Traces

    Distributed traces are used to capture transactions flowing through a system. Traces are made of spans, which represent the units of work within a distributed trace.

    CICS Transaction Gateway Spans

    Semantic conventions for CTG request and response spans captured on a CTG server or CTG client. The span.kind is client for spans captured on a CTG client and is server for spans captured on a CTG server. This applies to both the request and the response.

    CTG supports different request types, such as ECI, ESI, or EPI. The call type and response codes have different semantics depending on the request type. Furthermore, some fields are only populated for some request types.

    Request

    Request spans have attributes conforming to the following table:

    Attribute
    Type
    Description
    Examples
    cics.transaction.user_id
    string
    experimental
    The user ID of the user who triggered this transaction.
    USER1; anon
    ctg.request.call_type
    long
    experimental
    Integer representing the call type of the CTG GatewayRequest. The set of possible values varies per request type. 1
    2
    ctg.request.commarea_length
    long
    experimental
    Length of the COMMAREA. Only set when the request type is ECI.
    0
    ctg.request.extend_mode
    long
    experimental
    Integer representing the extended mode of the CTG GatewayRequest. Only set when the request type is ECI. 2
    11
    ctg.request.flow_type
    long
    experimental
    Integer representing the flow type of the CTG GatewayRequest. 3
    5
    ctg.request.gateway_url
    string
    experimental
    URL of the gateway. Only set on client-side spans.
    tcp://1.2.3.4:5678/
    ctg.request.object_name
    string
    experimental
    Name of the request object. Only set when the request type is ADMIN.
    ctg.request.server_id
    string
    experimental
    ID of the server. Not set for all request types.
    IPICTEST
    ctg.request.term_id
    string
    experimental
    Name of the terminal resource. Only set when the request type is EPI.
    CN02
    ctg.request.type
    string
    experimental
    Type of the CTG GatewayRequest.
    BASE
    ibm.cics.program
    string
    resource experimental
    The name of the CICS program.
    EDUCHAN
    network.transport
    string
    tcp; udp
    server.address
    string
    stable
    Logical server hostname, matches server FQDN if available, and IP or socket address if FQDN is not known.
    example.com
    server.port
    long
    stable
    Logical server port number.
    65123; 80
    server.resolved_ips
    ipAddress[]
    stable
    A list of IP addresses that are the result of DNS resolution of server.address.
    [194.232.104.141, 2a01:468:1000:9::140]
    zos.transaction.id
    string
    experimental
    The ID of this transaction.
    CEMT; DTAX; IVTNO
    3

    The values are defined in the IBM CTG API source code.

    ctg.request.type MUST be one of the following:

    Value
    Description
    ADMIN
    Admin request.
    AUTH
    Authentication request.
    BASE
    Base. A base GatewayRequest without a further subtype. 1
    ECI
    External Call Interface. Enables a client application to call a CICS program synchronously or asynchronously. 2
    EPI
    External Presentation Interface. Enables a user application to install a virtual IBM 3270 terminal into a CICS server. 3
    ESI
    External Security Interface. Enables user applications to perform security-related tasks. 4
    XA
    CICS Request Exit. It can be used for request retry, dynamic server selection, and rejecting non-valid requests. 5

    network.transport has the following list of well-known values. If one of them applies, then the respective value MUST be used, otherwise a custom value MAY be used.

    Value
    Description
    inproc
    In-process communication. 1
    other
    Something else (non-IP-based).
    pipe
    Named or anonymous pipe.
    tcp
    TCP
    udp
    UDP
    unix
    Unix domain socket.
    1

    Signals that there is only in-process communication not using a "real" network protocol in cases where network attributes would typically be expected. Usually, all other network attributes can be left out.

    Response

    Response spans have attributes conforming to the following table:

    Attribute
    Type
    Description
    Examples
    ctg.request.type
    string
    experimental
    Type of the CTG GatewayRequest.
    BASE
    ctg.response.code
    long
    experimental
    CTG response code. The set of possible values varies per request type. 1
    -23

    ctg.request.type MUST be one of the following:

    Value
    Description
    ADMIN
    Admin request.
    AUTH
    Authentication request.
    BASE
    Base. A base GatewayRequest without a further subtype. 1
    ECI
    External Call Interface. Enables a client application to call a CICS program synchronously or asynchronously. 2
    EPI
    External Presentation Interface. Enables a user application to install a virtual IBM 3270 terminal into a CICS server. 3
    ESI
    External Security Interface. Enables user applications to perform security-related tasks. 4
    XA
    CICS Request Exit. It can be used for request retry, dynamic server selection, and rejecting non-valid requests. 5

    Custom Services

    Custom service spans represent entry points into a service or entry points to specific components within a larger application. OneAgent Code Modules can create custom service spans via automatic instrumentation rules or directly by OneAgent SDK APIs.

    Attribute
    Type
    Description
    Examples
    custom_service.method
    string
    experimental
    The service method of a custom service. This field only exists if a custom service was created via Dynatrace OneAgent SDK.
    startTask; run; authenticate
    custom_service.name
    string
    experimental
    The name of a custom service. This field only exists if a custom service was created via Dynatrace OneAgent SDK.
    MyCustomService; AuthenticationComponent
    supportability.custom_service.rule_id
    uid
    experimental
    The ID of a custom service configuration rule. This field is only present if a custom service was configured as an automatic instrumentation rule in Dynatrace.
    4d76194c11a9426197a9062548f9e66e

    Database Client Spans

    Semantic conventions for database client spans. The span.kind for database client spans is client.

    A span representing a database client operation might include the operation itself and the following result processing (for example, fetch from SQL result set, MongoDB cursor operations, etc.). Besides, several similar db operations might be aggregated into a single span for efficiency.

    The aggregation attributes provide information on how many db operations have been aggregated.

    The db.result.* attributes represent the details of the result processing.

    Attribute
    Type
    Description
    Examples
    db.affected_item_count
    long
    experimental
    The number of items (rows, documents,…) affected.
    32
    db.collection.name
    string
    stable
    The name of a collection (table, container) within the database.
    customers; public.users
    db.cosmosdb.request_charge
    double
    experimental
    The cost of the request in Azure Cosmos DB request units (RU).
    4.95; 2.0
    db.dynamodb.table_names
    string[]
    experimental
    The list of tables the request targets.
    [Cats, Dogs]
    db.namespace
    string
    stable
    The name of the database, fully qualified within the server address and port.
    customers; test.users
    db.operation.name
    string
    stable
    The name of the operation or command executed, for example the MongoDB command name, SQL keyword, Redis command name,… 1
    drop; findAndModify; SELECT; PREPARE; GetItem; set; LPUSH; mutateIn; ReadItems
    db.query.parameters
    record[]
    experimental
    The query parameters used in db.query.text represented as a key and value map. For database systems without named keys, the map key is the string representation of the index starting with 0. Several database requests may get aggregated into a single span. Each entry in the array holds the bind parameters for one database request.
    Tags: sensitive-spans
    [{'name': 'paul', 'age': '23'}, {'name': 'mary', 'age': '32'}]; [{'0': 'paul', '1': '23'}, {'0': 'mary', '1': '32'}]
    db.query.text
    string
    stable
    The database query being executed. 2
    SELECT * FROM wuser_table; SET mykey "WuValue"
    db.result.duration_max
    duration
    experimental
    The maximum duration in nanoseconds used for fetching the result.
    345
    db.result.duration_min
    duration
    experimental
    The minimum duration in nanoseconds used for fetching the result.
    123
    db.result.duration_sum
    duration
    experimental
    The total duration in nanoseconds used for fetching the result.
    234
    db.result.exception_count
    long
    experimental
    The number of exceptions encountered while fetching the result.
    2
    db.result.execution_count
    long
    experimental
    The number of operations executed on the result (for example, fetches from SQL result set, MongoDB cursor operations).
    12
    db.result.roundtrip_count
    long
    experimental
    The number of round-trips triggered by fetching the result.
    2
    db.system
    string
    experimental
    An identifier for the database management system (DBMS) product being used. See below for a list of well-known identifiers.
    mongodb; mysql
    network.transport
    string
    tcp; udp
    server.address
    string
    stable
    Logical server hostname, matches server FQDN if available, and IP or socket address if FQDN is not known.
    example.com
    server.port
    long
    stable
    Logical server port number.
    65123; 80
    server.resolved_ips
    ipAddress[]
    stable
    A list of IP addresses that are the result of DNS resolution of server.address.
    [194.232.104.141, 2a01:468:1000:9::140]
    1

    Depending on the data provided on ingest, this attribute may be derived by e.g., parsing db.query.text. Parsing might fail, or the result might be inaccurate.

    2

    The value may be sanitized to exclude sensitive information.

    db.system has the following list of well-known values. If one of them applies, then the respective value MUST be used, otherwise a custom value MAY be used.

    Value
    Description
    adabas
    Adabas (Adaptable Database System)
    cache
    InterSystems Caché
    cassandra
    Apache Cassandra
    clickhouse
    ClickHouse
    cloudscape
    Cloudscape
    cockroachdb
    CockroachDB
    coldfusion
    ColdFusion IMQ
    cosmosdb
    Microsoft Azure Cosmos DB
    couchbase
    Couchbase
    couchdb
    CouchDB
    db2
    IBM Db2
    derby
    Apache Derby
    dl/i
    IBM DL/I
    dynamodb
    Amazon DynamoDB
    edb
    EnterpriseDB
    elasticsearch
    Elasticsearch
    filemaker
    FileMaker
    firebird
    Firebird
    firstsql
    FirstSQL
    geode
    Apache Geode
    h2
    H2
    hanadb
    SAP HANA
    hbase
    Apache HBase
    hive
    Apache Hive
    hsqldb
    HyperSQL DataBase
    informix
    Informix
    ingres
    Ingres
    instantdb
    InstantDB
    interbase
    InterBase
    mariadb
    MariaDB
    maxdb
    SAP MaxDB
    memcached
    Memcached
    mongodb
    MongoDB
    mssql
    Microsoft SQL Server
    mssqlcompact
    Microsoft SQL Server Compact
    mysql
    MySQL
    neo4j
    Neo4j
    netezza
    Netezza
    opensearch
    OpenSearch
    oracle
    Oracle Database
    other_sql
    Some other SQL database. Fallback only. See notes.
    pervasive
    Pervasive PSQL
    pointbase
    PointBase
    postgresql
    PostgreSQL
    progress
    Progress Database
    redis
    Redis
    redshift
    Amazon Redshift
    spanner
    Cloud Spanner
    sqlite
    SQLite
    sybase
    Sybase
    teradata
    Teradata
    vertica
    Vertica

    network.transport has the following list of well-known values. If one of them applies, then the respective value MUST be used, otherwise a custom value MAY be used.

    Value
    Description
    inproc
    In-process communication. 1
    other
    Something else (non-IP-based).
    pipe
    Named or anonymous pipe.
    tcp
    TCP
    udp
    UDP
    unix
    Unix domain socket.
    1

    Signals that there is only in-process communication not using a "real" network protocol in cases where network attributes would typically be expected. Usually, all other network attributes can be left out.

    Fields for dli database

    Attribute
    Type
    Description
    Examples
    db.dli.pcb
    string
    experimental
    The name of the program communication block associated with this DL/I method.
    3; MYPCBNAM
    db.dli.segment_name
    string
    experimental
    The name of the last segment that was matched or returned.
    PARTROOT
    db.dli.segment_level
    string
    experimental
    The hierarchical level of the segment that was matched or returned.
    3; 24
    db.dli.processing_options
    string
    experimental
    The PCB processing options.
    GR
    db.dli.terminal_name
    string
    experimental
    The DL/I database or logical terminal name associated with this DL/I method.
    HWSAM5ZD; 10505
    db.dli.status_code
    string
    experimental
    The DL/I status code.
    QC
    db.dli.pcb_type
    string
    experimental
    The PCB type.
    DC; DL/I; F/P

    db.dli.pcb_type MUST be one of the following:

    Value
    Description
    DC
    Data communications.
    DL/I
    DL/I db.
    F/P
    Fast Path.

    Dynatrace Span

    The semantic conventions for the Dynatrace span and the fields the user can expect.

    Hierarchical Attributes

    The following hierarchical attributes are mandatory.

    Attribute
    Type
    Description
    Examples
    span.alternate_parent_id
    uid
    experimental
    The alternative span.id of this span's parent span. If a trace is monitored by more tracing systems (for example, OneAgent and OpenTelemetry), there might be two parent spans. If the two parent spans differ, span.parent_id holds the ID of the parent span originating from same tenant of the span while span.alternate_parent_id holds the other parent span ID. The span.alternate_parent_id is an 8-byte ID and hex-encoded if shown as a string.
    f76281848bd8288c
    span.id
    uid
    stable
    A unique identifier for a span within a trace. The span.id is an 8-byte ID and hex-encoded if shown as a string.
    f76281848bd8288c
    span.is_subroutine
    boolean
    experimental
    If set to true, it indicates that this span is a subroutine of its parent span. The spans represent functions running on the same thread on the same call stack.
    span.kind
    string
    stable
    Distinguishes between spans generated in a particular context.
    server
    span.parent_id
    uid
    stable
    The span.id of this span's parent span. The span.parent_id is an 8-byte ID and hex-encoded if shown as a string.
    f76281848bd8288c
    trace.id
    uid
    stable
    A unique identifier for a trace. The trace.id is a 16-byte ID and hex-encoded if shown as a string.
    357bf70f3c617cb34584b31bd4616af8

    Timing Attributes

    Attributes start_time, end_time and duration are mandatory for all spans. The attributes in the span.timing namespace are optional and represent measurements provided by the OneAgent.

    Attribute
    Type
    Description
    Examples
    duration
    duration
    stable
    The difference of start_time and end_time in nanoseconds.
    42
    end_time
    timestamp
    stable
    End time of a data point. Value is a UNIX Epoch time in nanoseconds and greater or equal to the start_time.
    1649822520123123165
    span.timing.cpu
    duration
    stable
    The overall CPU time spent executing the span, including the CPU times of child spans that are running on the same thread on the same call stack.
    span.timing.cpu_self
    duration
    stable
    The CPU time spent exclusively on executing this span, not including the CPU times of any children.
    start_time
    timestamp
    stable
    Start time of a data point. Value is a UNIX Epoch time in nanoseconds and less or equal to the end_time.
    1649822520123123123

    Aggregation Attributes

    OneAgent might aggregate spans having the same parent span into a single one. The aggregated span contains attributes to indicated that aggregation happened and to allow to reconstruct details.

    For aggregated spans the start_time holds the earliest start_time and end_time holds the latest end_time of all aggregated spans. Like for non aggreated spans duration is the difference between start_time and end_time which might differ from aggregation.duration_sum because aggregated spans were executed in parallel or there were gaps between the spans.

    Attribute
    Type
    Description
    Examples
    aggregation.count
    long
    stable
    The number of spans aggregated into this span. Because this span represents multiple spans, the value is >1.
    3
    aggregation.duration_max
    duration
    stable
    The duration in nanoseconds for the longest aggregated span.
    482
    aggregation.duration_min
    duration
    stable
    The duration in nanoseconds for the shortest aggregated span.
    42
    aggregation.duration_samples
    duration[]
    stable
    Array of reservoir sampled span durations of the aggregated spans. The duration samples can be used to estimate a more accurate duration distribution of aggregated spans rather than the average value.
    [42, 482, 301]
    aggregation.duration_sum
    duration
    stable
    The duration sum in nanoseconds for all aggregated spans.
    123
    aggregation.exception_count
    long
    stable
    The number of aggregated spans that included an exception.
    0; 6
    aggregation.parallel_execution
    boolean
    stable
    true indicates that aggregated spans may have been executed in parallel. Therefore, start_time + duration_sum may exceed end_time.

    Sampling Attributes

    If the span does not represent a single span, it can have attributes to support extrapolation of its values.

    Attribute
    Type
    Description
    Examples
    sampling.threshold
    long
    experimental
    The sampling probability is encoded as sampling.threshold with respect to a 56-bit random integer rv. A span is sampled if rv >= sampling.threshold; the sampling threshold acts as a rejection threshold and can be interpreted as the number of spans discarded out of 2^56. The attribute is only available if the sampling.threshold is not 0, and therefore sampling happened. The relationship between sampling probability and threshold is sampling probability = (2^56-sampling.threshold) * 2^(-56). Hence, sampling.threshold=0 means 100% sampling probability (collect all data), sampling.threshold=2^55 corresponds to a sampling probability of 50%, sampling.threshold=2^54 corresponds to a sampling probability of 75%.
    36028797018963968
    supportability.alr_sampling_ratio
    long
    experimental
    The denominator of the sampling ratio of the Dynatrace cluster, the attribute is only set if Adaptive Load Redution (ALR) is active on the Dynatrace cluster. A numerator is not specified, as it's always 1. If, for example, the Dynatrace cluster samples with a probability of 1/8 (12,5%), the value of supportability.alr_sampling_ratio would be 8 and the numerator is 1.
    8
    supportability.atm_sampling_ratio
    long
    experimental
    The denominator of the sampling ratio of an Adaptive Traffic Management (ATM) aware sampler. The attribute is always present if an ATM-aware sampler is active (this applies, for example, to Dynatrace OneAgent). A numerator is not specified, as it is always 1. If, for example, Dynatrace OneAgent samples with a probability of 1/16 (6,25%), the value of supportability.atm_sampling_ratio would be 16 and the numerator is 1.
    16

    Currently sampling can happen two stages in the data processing. Independend where sampling happens the span has the sampling.threshold for calculation of the combined (effective) sample rate. Supportability attributes help the understand the sampling on the different stages.

    • OneAgent: If the OneAgent has enabled adaptive traffic management (ATM), the agent samples PurePaths and the attribute supportability.atm_sampling_ratio is added to all effected spans.
    • Dynatrace Cluster: If the Dynatrace cluster is overloaded, it starts adaptive load reduction (ALR) and samples PurePaths. The attribute supportability.alr_sampling_ratio is added to all effected spans.

    If for example OneAgents samples with a probability of 25% the spans would contain the attributes sampling.threshold=54043195528445952 and supportability.atm_sampling_ratio=4.

    Details about adaptive traffic management for distributed tracing can be found in the documentation.

    Code Attributes

    When a span logically represents the execution of a function, it will have code.* attributes, describing that function.

    invoked.code.* attributes describe the function in which a span has been started, but not necessarily ended. It often represents the function that has been instrumented in order to start a span. These attributes are only populated, if they mismatch with code.*.

    Attribute
    Type
    Description
    Examples
    code.function
    string
    experimental
    The method or function name, or equivalent (usually the rightmost part of the code unit's name). Represents the name of the function that is represented by this span.
    serveRequest
    code.namespace
    string
    experimental
    The namespace within which code.function is defined. Usually, the qualified class or module name, such that code.namespace + some separator + code.function forms a unique identifier for the code unit.
    com.example.MyHttpService
    code.filepath
    string
    experimental
    The source code file name that identifies the code unit as uniquely as possible.
    /usr/local/MyApplication/content_root/app/index.php
    code.line.number
    long
    experimental
    The line number within the source code file.
    1337
    code.invoked.function
    string
    experimental
    Like code.function, only it represents the function that was active when a span has been started. Typically, it's the function that has been instrumented. The spans duration does not reflect the duration of this function execution. It should only be set if it differs from code.function.
    invoke
    code.invoked.namespace
    string
    experimental
    Like code.namespace, only it represents the namespace of the function that was active when a span has been started. Typically, it's the function that has been instrumented. It should only be set if it differs from code.namespace.
    com.sun.xml.ws.server.InvokerTube$2
    code.invoked.filepath
    string
    experimental
    Like code.filepath, only it represents the file path of the function that was active when a span has been started. Typically, it is the function that has been instrumented. It should only be set if it differs from code.filepath.
    /usr/local/MyApplication/content_root/app/index.php
    code.call_stack
    string
    experimental
    The call stack of the code.function. The call stack starts with the code.function, and the stack frames are separated by a line feed.
    com.example.SampleClass.doProcessing(SampleClass.java) com.example.SampleClass.doSomeWork(SampleClass.java) com.example.SampleClass.main(SampleClass.java)

    Events

    Attribute
    Type
    Description
    Examples
    span.events
    record[]
    stable
    A collection of events. An event is an optional time-stamped annotation of the span and consists of a name and key-value pairs.
    supportability.dropped_events_count
    long
    experimental
    The number of span events that were discarded on the source.
    1

    Span events have their own semantics defined here.

    Exception Events

    If the span was exited by an exception or contains other exception events, the following fields are available to provide a reference to the correct exception in the list of the span.events.

    Attribute
    Type
    Description
    Examples
    span.exit_by_exception_id
    uid
    stable
    The exception.id of the exception the its span.events with the current span exited. The referenced exception has set the attribute exception.escaped to true.
    span.is_exit_by_exception
    boolean
    stable
    Set to true if an exception exited the span. If set to false, the span has exception events, but none exited the span.
    Attribute
    Type
    Description
    Examples
    span.links
    record[]
    stable
    A collection of links. A link is a reference from this span to a whole trace or a span in the same or different trace.
    supportability.dropped_links_count
    long
    experimental
    The number of span links that were discarded on the source.
    1

    Span links have their own semantics defined here.

    Failure Detection

    Fields that can be expected for a failure detection on a Dynatrace span. Failure detection will be applied to spans that represent requests on endpoints and incoming Istio services mesh proxies. A request is considered failed if at least one failure reason is detected and no success forcing rule matches. The combined result (failure or success) will be stored in the attribute request.is_failed (see also Request). To modify failure detection behavior, modify its configuration.

    Attribute
    Type
    Description
    Examples
    dt.failure_detection.ruleset_id
    uid
    experimental
    The id of the failure detection rule set (failure detection v2) that was applied to that span (uid128).
    4d76194c11a9426197a9062548f9e66e
    dt.failure_detection.general_parameters_id
    uid
    experimental
    The id of the failure detection general parameters (failure detection v1) that were applied to that span (uid128).
    4d76194c11a9426197a9062548f9e66f
    dt.failure_detection.http_parameters_id
    uid
    experimental
    The id of the failure detection HTTP parameters (failure detection v1) that were applied to that span (uid128).
    4d76194c11a9426197a9062548f9e66a
    dt.failure_detection.global_rule_id
    uid
    experimental
    The id of the global failure detection rule (failure detection v1) that was applied to that span (uid128).
    This is always used in conjunction with the dt.failure_detection.global_parameters_id.
    4d76194c11a9426197a9062548f9e66b
    dt.failure_detection.global_parameters_id
    uid
    experimental
    The id of the global failure detection parameters (failure detection v1) that were applied to that span (uid128).
    This is always used in conjunction with the dt.failure_detection.global_rule_id.
    4d76194c11a9426197a9062548f9e66c
    dt.failure_detection.results
    record[]
    experimental
    A collection of individual failure detection reasons and verdicts for each applied matching rule. If no entries exist, no rules matched, and the attribute does not exist.

    Failure detection has its own semantics defined here.

    Server and client attributes

    These attributes may be used to describe the client and server in a connection-based network interaction where there is one side (the client) that initiates the connection. This covers all TCP network interactions since TCP is connection-based and one side initiates the connection (an exception is made for peer-to-peer communication over TCP where the "user-facing" surface of the protocol / API does not expose a clear notion of client and server). This also covers UDP network interactions where one side initiates the interaction, e.g. QUIC (HTTP/3) and DNS.

    In an ideal situation, not accounting for proxies, multiple IP addresses or host names, the server.* attributes are the same on the client and server span.

    Server attributes

    Attribute
    Type
    Description
    Examples
    server.address
    string
    stable
    Logical server hostname, matches server FQDN if available, and IP or socket address if FQDN is not known.
    example.com
    server.resolved_ips
    ipAddress[]
    stable
    A list of IP addresses that are the result of DNS resolution of server.address.
    [194.232.104.141, 2a01:468:1000:9::140]
    server.port
    long
    stable
    Logical server port number.
    65123; 80
    server.address

    For IP-based communication, the name should be a DNS host name of the service. On client side it matches remote service name, on server side, it represents local service name as seen externally on clients.

    When connecting to a URL https://example.com/foo, server.address matches "example.com" on both client and server side.

    On client side, it's usually passed in form of a URL, connection string, host name, etc. Sometimes host name is only available as a string which may contain DNS name or IP address.

    If network.transport is pipe, the absolute path to the file representing it is used as server.address.

    For Unix domain socket, server.address attribute represents the remote endpoint address on client side and local endpoint address on server side.

    Client attributes

    Attribute
    Type
    Description
    Examples
    client.ip
    ipAddress
    experimental
    The IP address of the client that makes the request. This may be IPv4 or IPv6.
    Tags: sensitive-spans
    194.232.104.141; 2a01:468:1000:9::140
    client.port
    long
    stable
    Client port number.
    65123; 80
    client.isp
    string
    experimental
    The name of the Internet Service Provider (ISP) associated with the client's IP address.
    Internet Service Provider Name
    client.ip.is_public
    boolean
    experimental
    Indicates whether IP is a public IP.
    true
    client.app.name
    string
    experimental
    The name of the client application used to perform the request.
    MS Outlook
    client.address
    string
    experimental
    Client address - domain name if available without reverse DNS lookup; otherwise, IP address or Unix domain socket name.
    client.example.com; 10.1.2.80; [local]

    Supportability Attributes

    Supportability attributes help to understand the characteristics of the span.

    Attribute
    Type
    Description
    Examples
    supportability.dropped_attributes_count
    long
    experimental
    The number of attributes that were discarded on the source. Attributes can be discarded because their keys are too long or because there are too many attributes.
    1
    supportability.non_persisted_attribute_keys
    string[]
    experimental
    A string array of attribute keys that were not stored as they were not allow-listed or were removed during the pipeline steps.
    ["my_span_attribute", "db.name"]
    trace.alternate_id
    uid
    experimental
    The preserved trace ID when OneAgent and other tracing systems monitor the same process and the trace ID from the other tracing system was replaced by the OneAgent trace ID. The trace.alternate_id is a 16-byte ID and hex-encoded if shown as a string.
    357bf70f3c617cb34584b31bd4616af8
    trace.state
    string
    experimental
    The trace state in the w3c-trace-context format.
    f4fe05b2-bd92206c@dt=fw4;3;abf102d9;c4592;0;0;0;2ee;5607;2h01;3habf102d9;4h0c4592;5h01;6h5f9a543f1184a52b1b744e383038911c;7h6564df6f55bd6eae,apmvendor=boo,foo=bar

    Requests

    Requests and Endpoints

    Requests are an important hierarchical grouping of spans within a trace. A request spawns all spans from the detected request root span until the service is left again. The grouping of spans into requests allows for very powerful queries and advanced analysis. Every request always has a request root span which is special as it is the trigger for detecting endpoints and hence defining the service API.

    Attribute
    Type
    Description
    Examples
    dt.endpoint_detection.rule_id
    uid
    experimental
    The ID of the endpoint detection rule that was applied to that span.
    4d76194c11a9426197a9062548f9e66e
    endpoint.name
    string
    stable
    The endpoint name is derived from endpoint detection rules and uniquely identifies one endpoint of a particular service. Endpoint names are usually technology-specific and should be defined by attributes with low cardinality, like http.route or rpc.method. Endpoints are exclusively detected on request root spans.
    GET /; PUT /users/:userID?; GET /productpage; Reviews.GetReviews
    request.is_failed
    boolean
    experimental
    Indicates that the request is considered failed according to the failure detection rules. Only present on the request root span.
    request.is_root_span
    boolean
    experimental
    Marks the root of a request. It's the first span and starts the request within a service.

    Request Attributes

    Request attributes allow you to enrich spans collected by OneAgents with deep-insight data which is not captured on trace data by default. They are modelled as:

    • Captured attributes, which represent the raw value as reported by the OneAgent.
    • Request attributes, which represent the normalized value along a complete request

    The names of request and captured attributes are composed of the prefixes "captured_attribute" and "request_attribute" and the name given in the configuration by the user:

    Attribute
    Type
    Description
    Examples
    captured_attribute.__attribute_name__
    array
    stable
    Contains the span scoped raw values that were captured under the name __attribute_name__ defined by the request attribute configuration. The values are mapped as an array according to the type of the captured attributes, so either boolean, double, long, or string. If the captured attributes have mixed types (e.g. long and string, or double and long, etc.), all attributes are converted to string and stored as string array.
    [42]; ['Platinum']; [32, 16, 8]; ['Special Offer', '1702']; ['18.35', '16']
    request_attribute.__attribute_name__
    array
    stable
    Contains the request scoped reconciled values of the attribute named __attribute_name__ defined by the request attribute configuration. The data type of the value depends on the request attribute definition.
    Tags: sensitive-spans
    42; Platinum; ['Product A', 'Product B']; ['Special Offer', '1702']

    Size of a span

    The calculated sizes of a span in bytes. The dt.ingest.size is calculated when the span is ingested while the dt.retain.size is calculated before the span gets stored.

    Attribute
    Type
    Description
    Examples
    dt.ingest.size
    long
    stable
    The size of the ingested data point in bytes.
    2005
    dt.retain.size
    long
    stable
    The size of the retained data point in bytes.
    2005

    Status

    A span contains a status consisting of a code and an optional descriptive message. The status is especially relevant if there is a known error in the application code, such as an exception in which case the span status can be set to error. The span status is only present if it is explicitly set to error or ok.

    Attribute
    Type
    Description
    Examples
    span.status_code
    string
    stable
    Defines the status of a span, predominantly used to indicate a processing error. This field is absent if the reported span status is unset.
    error
    span.status_message
    string
    experimental
    An optional text that can provide a descriptive error message in case the span.status_code is error.
    Connection closed before message completed; Error sending request for url

    Error status reasons

    The following reasons cause the span.status_code to be error:

    • If the span was exited by an exception, i.e. the attribute span.is_exit_by_exception is set to true.
    • HTTP spans:
      • General: For http.response.status_code values in the 5xx range.
      • If span.kind is client: For http.response.status_code values in the 4xx range.
    • gRPC spans:
      • If span.kind is client: For all rpc.grpc.status_code values except OK (0).
      • If span.kind is server: For rpc.grpc.status_code values UNKNOWN (2), DEADLINE_EXCEEDED (4), UNIMPLEMENTED (12), INTERNAL (13), UNAVAILABLE (14), DATA_LOSS (15).

    Additional Attributes

    Beside the attributes listed above, arbitrary other attributes are allowed on a span.

    Dynatrace Span Events

    Semantic conventions for span events on Dynatrace spans.

    Common

    In general, a span event does not need to follow specific semantics, but typically, span events have the following common attributes.

    Attribute
    Type
    Description
    Examples
    span_event.name
    string
    stable
    Some span events have a defined semantics based on the name of the span event.
    exception
    supportability.dropped_attributes_count
    long
    experimental
    The number of attributes that were discarded on the source. Attributes can be discarded because their keys are too long or because there are too many attributes.
    1
    supportability.non_persisted_attribute_keys
    string[]
    experimental
    A string array of attribute keys that were not stored as they were not allow-listed or were removed during the pipeline steps.
    ["my_span_attribute", "db.name"]
    timestamp
    timestamp
    stable
    The time (UNIX Epoch time in nanoseconds) when the event originated, typically when the source created it. If no original timestamp is available, it will be populated at ingest time and required for all events. In the case of a correlated event (for example, ITIL events), this time could be different from the event.start time, as this time represents the actual timestamp when the "update" for the event was created.
    1649822520123123123

    Besides the common attributes, any arbitrary attributes are allowed for span events.

    Exception

    If exceptions happen and are captured during a span, they're available as span events. Exceptions events have the span_event.name set to exception. Besides the following exception event-specific attributes, all semantics of the common section apply.

    Attribute
    Type
    Description
    Examples
    exception.caused_by_id
    uid
    stable
    The exception.id of the exception the current exception was caused by.
    exception.escaped
    boolean
    stable
    true indicates that the exception was recorded at a point where it is known that the exception escaped the scope of the span.
    exception.id
    uid
    stable
    The identifier of an exception. It should be unique within a list of exceptions. The identifier is used to reference the exception.
    exception.is_caused_by_root
    boolean
    stable
    Is set to true if the exception is the first exception caused by the chain.
    exception.message
    string
    stable
    A message that describes the exception.
    Division by zero
    exception.stack_trace
    string
    experimental
    The stack trace of the exception. The format depends on the technology and source. While OneAgent formats stack traces to unify them across technologies, stack traces from an OpenTelemetry source are in the format they were sent to Dynatrace.
    @https://www.foo.bar/path/main.js:59:26 e@https://www.foo.bar/path/lib/1.1/lib.js:2:30315
    exception.type
    string
    stable
    The type of the exception, for example its fully-qualified class name.
    java.net.ConnectException; OSError
    span_event.name
    string
    stable
    Is set to exception for exception events.
    exception

    Feature Flag Evaluation

    A flag evaluation SHOULD be recorded as an event on the span during which it occurred. Feature flag events have the span_event.name set to feature_flag.

    Attribute
    Type
    Description
    Examples
    feature_flag.key
    string
    experimental
    The unique identifier of the feature flag.
    logo-color
    feature_flag.provider_name
    string
    experimental
    The name of the service provider that performs the flag evaluation.
    Flag Manager
    feature_flag.variant
    string
    experimental
    SHOULD be a semantic identifier for a value. If one is unavailable, a stringified version of the value can be used. 1
    red; true; on
    span_event.name
    string
    stable
    Is set to feature_flag for feature flag events.
    feature_flag
    1

    A semantic identifier, commonly referred to as a variant, provides a means for referring to a value without including the value itself. This can provide additional context for understanding the meaning behind a value. For example, the variant red maybe be used for the value #c05543.

    A stringified version of the value can be used in situations where a semantic identifier is unavailable. The implementer should determine the string representation of the value.

    Business Events

    If a span is related to a business event, the IDs of the business events are available as span events. The span events have the span_event.name set to bizevent.

    Attribute
    Type
    Description
    Examples
    event.id
    string
    stable
    Unique identifier string of an event; is stable across multiple refreshes and updates.
    5547782627070661074_1647601320000
    span_event.name
    string
    stable
    Is set to bizevent for bizevent events.
    bizevent

    Semantic conventions for well known span links.

    By Span and Trace Id

    A span link by span.id and trace.id references to a target span on a different trace.

    Attribute
    Type
    Description
    Examples
    span.id
    uid
    stable
    A unique identifier for a span within a trace. The span.id is an 8-byte ID and hex-encoded if shown as a string.
    f76281848bd8288c
    supportability.dropped_attributes_count
    long
    experimental
    The number of attributes that were discarded on the source. Attributes can be discarded because their keys are too long or because there are too many attributes.
    1
    supportability.non_persisted_attribute_keys
    string[]
    experimental
    A string array of attribute keys that were not stored as they were not allow-listed or were removed during the pipeline steps.
    ["my_span_attribute", "db.name"]
    trace.alternate_id
    uid
    experimental
    The preserved trace ID when OneAgent and other tracing systems monitor the same process and the trace ID from the other tracing system was replaced by the OneAgent trace ID. The trace.alternate_id is a 16-byte ID and hex-encoded if shown as a string.
    357bf70f3c617cb34584b31bd4616af8
    trace.id
    uid
    stable
    A unique identifier for a trace. The trace.id is a 16-byte ID and hex-encoded if shown as a string.
    357bf70f3c617cb34584b31bd4616af8
    trace.state
    string
    experimental
    The trace state in the w3c-trace-context format.
    f4fe05b2-bd92206c@dt=fw4;3;abf102d9;c4592;0;0;0;2ee;5607;2h01;3habf102d9;4h0c4592;5h01;6h5f9a543f1184a52b1b744e383038911c;7h6564df6f55bd6eae,apmvendor=boo,foo=bar

    Besides the attributes listed above, arbitrary other attributes are allowed on a generic span link.

    A span link by dt.tracing.custom_link.id references another span with a span link to the same dt.tracing.custom_link.id. This span link is used for technologies where full context propagation with span ID and trace ID is not possible, and only a limited amount of information can be propagated between tiers.

    The dt.tracing.link.direction defines the hierarchy between two spans having span links with the same dt.tracing.custom_link.id.

    Attribute
    Type
    Description
    Examples
    dt.tracing.custom_link.id
    uid
    experimental
    The custom link ID to identify spans calling each other. The ID is derived from the custom link bytes.
    736bd2684696c4a8
    dt.tracing.custom_link.original_bytes
    binary
    experimental
    The original binary data of the custom link.
    ycXlxUBAQEDee9lm8pBcA8nF5cVAQEBA3nvZZvKQXAPee9lm8s4SAQ==
    dt.tracing.custom_link.transformed_bytes
    binary
    experimental
    The transformed binary data of the custom link. Only available if a mapping was applied.
    ycXlxUBAQEDee9lm8pBcA8nF5cVAQEBA3nvZZvKQXAPee9lm8s4SAQ==
    dt.tracing.custom_link.type
    string
    experimental
    The type of the custom link defines if a mapping of the dt.tracing.custom_link.original_bytes to the dt.tracing.custom_link.transformed_bytes was applied.
    generic
    dt.tracing.link.direction
    string
    experimental
    The direction of the span link to define the correct order between spans.
    outgoing
    dt.tracing.link.is_sync
    boolean
    experimental
    true indicates that the caller waits on the response. Only available on span links with dt.tracing.link.direction set to outgoing.
    timestamp
    timestamp
    stable
    The time (UNIX Epoch time in nanoseconds) when the span was propagated. Only available on span links with dt.tracing.link.direction set to outgoing.
    1649822520123123123

    A Dynatrace link provides additional details regarding the parent and child timing on top of span.parent_id. This data is optional and not provided by all span data sources.

    Attribute
    Type
    Description
    Examples
    dt.tracing.link.direction
    string
    experimental
    The direction of the span link to define the correct order between spans.
    outgoing
    dt.tracing.link.id
    uid
    experimental
    Unique identifier for a Dynatrace link.
    dt.tracing.link.is_sync
    boolean
    experimental
    true indicates that the caller waits on the response. Only available on span links with dt.tracing.link.direction set to outgoing.
    timestamp
    timestamp
    stable
    The time (UNIX Epoch time in nanoseconds) when the span was propagated. Only available on span links with dt.tracing.link.direction set to outgoing.
    1649822520123123123

    A span link by dt.tracing.foreign_link refers to an upstream transaction. This could be a cross-environment link or a cross-product link to a distributed trace in the legacy AppMon product. Depending on whether the link information was received in binary or text, either dt.tracing.foreign_link.bytes or dt.tracing.foreign_link.text will be set, respectively.

    Attribute
    Type
    Description
    Examples
    dt.tracing.foreign_link.bytes
    binary
    experimental
    An incoming foreign link (cross-environment or cross-product).
    00000004000000010000000200000003000000040000002300000001
    dt.tracing.foreign_link.text
    string
    experimental
    An incoming foreign link (cross-environment or cross-product).
    FW4;129;12;-2023406815;4539717;0;17;66;c511;2h02;3h12345678;4h676767; FW1;129;4711;59959450;-1859959450;3;17;0

    By Response Headers

    A span link by dt.tracing.response.headers refers to a downstream transaction. This could be a cross-environment link.

    Attribute
    Type
    Description
    Examples
    dt.tracing.response.headers
    record
    experimental
    A collection of key-value pairs containing received response headers related to tracing from an outgoing call. There may be multiple values for each header. Used for cross-environment linking.
    {'traceresponse': ['00-7b9e3e4068167838398f50017bfad358-d4ffc7e33530967a-01'], 'x-dt-tracestate': ['9651e1a8-19506b7c@dt']}

    ESB Spans

    Semantic conventions for ESB (Enterprise Service Bus) spans. An ESB span holds information about the realm in which the span is produced. This metadata includes, for example, the workflow in which the span is placed and the application or library to which the workflow belongs.

    Attributes

    The workflow name is mandatory information and contributes the most to identifying where this span comes from. The application and library provide a high-level view of which deployment the span belongs to. It's also worth mentioning that application and library are typically seen as mutually exclusive, although this is not enforced in any way."

    Attribute
    Type
    Description
    Examples
    esb.application.name
    string
    resource experimental
    The name of the application that owns the current workflow.
    myBusinessApp; YourServiceApp; any_work
    esb.library.name
    string
    resource experimental
    The name of the library that owns the current workflow.
    myWebServicesLib; YourMessagingLibrary; any_tools
    esb.vendor
    string
    resource experimental
    The name of vendor of the ESB technology of the current workflow.
    ibm; tibco
    esb.workflow.is_subprocess
    boolean
    experimental
    Defines whether the provided workflow is a subprocess or not.
    false
    esb.workflow.name
    string
    resource experimental
    The label of the current workflow.
    myMessageFlow; YourBusinessWorkflow; any_flow

    Failure Detection Result

    Record containing fields that can be expected for a failure detection result. These results are part (as a record array) of a set of fields used by the failure detection feature and are referenced there via failure_detection.results. This record relates to failure detection v1 and v2.

    • Failure detection v1 will produce only one result in the array.
    • Failure detection v2 might produce multiple failure reasons. Each matching rule of a failure detection rule set will produce a single result.

    Fields

    Attribute
    Type
    Description
    Examples
    custom_rule_name
    string
    experimental
    Name of the custom rule that caused this result. Uniquely identifies the rule within a failure detection v2 rule set. Related to the custom_rule reason.
    Fail on my.failure.attribute==failed
    exception_ids
    uid
    experimental
    IDs of the exceptions that caused this rule result (more on exceptions).
    [123423523456, 523463467234]
    reason
    string
    experimental
    All possible failure detection reasons that caused a verdict.
    exception
    request_attribute_name
    string
    experimental
    Name of the request attribute that caused this result. Related to a custom error rule in a failure detection v1 configuration and the custom_error_rule reason.
    my special method count RA
    verdict
    string
    experimental
    All possible failure detection verdicts.
    failure

    reason MUST be one of the following:

    Value
    Description
    custom_error_rule
    Verdict is caused by a custom error rule (request attribute). Applicable in failure detection v1.
    This reason always comes together with the request_attribute_name field.
    custom_rule
    Verdict is caused by a custom rule. Applicable in failure detection v2.
    This reason always comes together with the custom_rule_name field.
    exception
    Verdict is caused by an exception. Applicable in failure detection v1 and v2.
    grpc_code
    Verdict is caused by the GRPC response code. Applicable in failure detection v2.
    http_code
    Verdict is caused by the HTTP response code. Applicable in failure detection v1 and v2.
    span_status
    Verdict is caused by the span status attribute. Applicable in failure detection v1 and v2.

    verdict MUST be one of the following:

    Value
    Description
    failure
    Indicates that the rule failed.
    success
    Indicates that the rule was successful.

    Function as a Service (FaaS)

    Fields that can be expected from serverless functions or Function as a Service (FaaS) on various cloud platforms. There are general attributes and attributes specific to incoming FaaS invocations (server side) and outgoing invocations (FaaS function as client calling out).

    General Attributes

    Attribute
    Type
    Description
    Examples
    azure.class_name
    string
    resource experimental
    The fully qualified name of the class executing an Azure function.
    Host.Functions
    azure.site_name
    string
    resource experimental
    Globally unique deployment information about an Azure function.
    dt-function-scripted
    cloud.account.id
    string
    resource stable
    The cloud account ID to which the resource is assigned.
    111111111111; opentelemetry
    cloud.platform
    string
    resource stable
    The cloud platform in use. 1
    alibaba_cloud_ecs
    cloud.provider
    string
    resource experimental
    Name of the cloud provider.
    alibaba_cloud
    cloud.region
    string
    resource stable
    Identifier of the cloud vendor's data center geographic region.
    us-east-1
    cloud.resource_id
    string
    resource stable
    Cloud provider-specific native identifier of the monitored cloud resource (for example, an ARN on AWS, a fully qualified resource ID on Azure, or a complete resource name on GCP).
    arn:aws:lambda:REGION:ACCOUNT_ID:function:my-function; //run.googleapis.com/projects/PROJECT_ID/locations/LOCATION_ID/services/SERVICE_ID; /subscriptions/<SUBSCIPTION_GUID>/resourceGroups/<RG>/providers/Microsoft.Web/sites/<FUNCAPP>/functions/<FUNC>
    faas.max_memory
    long
    resource experimental
    The amount of memory available to the serverless function in Bytes.
    faas.name
    string
    resource experimental
    The name of the single function that this runtime instance executes. 2
    my-function; myazurefunctionapp/some-function-name; test_function
    faas.version
    string
    resource experimental
    The immutable version of the function being executed. 3
    14; 254
    1

    The prefix of the service matches the one specified in cloud.provider.

    2

    This is the name of the function as configured/deployed on the FaaS platform and is usually different from the name of the callback function (which may be stored in the code.namespace/code.function span attributes).

    3

    Value of the field depends on a cloud provider. This field is not set for Azure.

    Incoming Invocations

    This section describes incoming FaaS invocations as they are reported by the FaaS instance itself. For incoming FaaS spans, the span.kind is either server or consumer.

    Attribute
    Type
    Description
    Examples
    aws.request_id
    string
    experimental
    The AWS request ID (e.g., value of x-amzn-requestid, x-amzn-request-id, or x-amz-request-id HTTP header, awsRequestId field in AWS lambda context object).
    0e7bc729-a468-57e8-8143-98f2eec5c925
    aws.xray.trace_id
    string
    experimental
    Contains the AWS X-Ray trace id (e.g., value of the x-amzn-trace-id HTTP header, _X_AMZN_TRACE_ID environment variable on AWS lambda)
    Root=1-63441c4a-abcdef012345678912345678; Self=1-63441c4a-12456789abcdef012345678;Root=1-67891233-abcdef012345678912345678
    faas.coldstart
    boolean
    experimental
    A boolean that is true if the serverless function is executed for the first time (aka cold-start).
    faas.document.collection
    string
    experimental
    The table/collection name on which the operation above was executed. 1
    my-coll-name
    faas.document.name
    string
    experimental
    The identifier for the specific item that changed after executing the operation above. 2
    my-file.jpg; 63eeb6e7d418cd98afb1c1d7
    faas.document.operation
    string
    experimental
    Relevant only for "datasource" trigger. The operation type which triggered the function invocation.
    delete
    faas.document.time
    string
    experimental
    The UTC ISO-8601 timestamp of the operation above. 3
    2020-03-08T00:30:12.456Z
    faas.event.__key__
    string
    stable
    Faas event attribute, the __key__ attribute in a Faas event represents the precise attribute name as received in the event. For example, it might be "faas.event.StackId" for the "StackId" attribute in an AWS CloudFormation event or "faas.event.IdentityPoolId" for the "IdentityPoolId" attribute in an AWS Cognito event. The value of this attribute is identical to the value received in the event.
    arn:aws:cloudformation:us-west-2:123456789012:stack/MyStack/1a2b3c4d-5678-90ab-cdef-EXAMPLE11111; eu-west-1:12345678-1234-1234-1234-123456789012
    faas.event_name
    string
    experimental
    The API action that triggered the faas event. 4
    ObjectCreated:Put (aws:s3); INSERT (aws:dynamodb)
    faas.event_source
    string
    experimental
    The cloud service that originated the event.
    aws:cloudwatch; aws:cloudformation
    faas.trigger
    string
    experimental
    Type of the trigger which caused this function invocation.
    datasource
    1

    Relevant only for faas.trigger=datasource trigger

    2

    Relevant only for faas.trigger=datasource trigger

    3

    Relevant only for faas.trigger=datasource trigger

    4

    The value of this attribute is specific to the service that generated the event.

    Outgoing Invocations

    This section describes outgoing FaaS invocations as they are reported by a client calling a FaaS instance. For outgoing FaaS spans, the span.kind is either client or producer.

    Attribute
    Type
    Description
    Examples
    aws.request_id
    string
    experimental
    The AWS request ID (e.g., value of x-amzn-requestid, x-amzn-request-id, or x-amz-request-id HTTP header, awsRequestId field in AWS lambda context object).
    0e7bc729-a468-57e8-8143-98f2eec5c925
    aws.xray.trace_id
    string
    experimental
    Contains the AWS X-Ray trace id (e.g., value of the x-amzn-trace-id HTTP header, _X_AMZN_TRACE_ID environment variable on AWS lambda)
    Root=1-63441c4a-abcdef012345678912345678; Self=1-63441c4a-12456789abcdef012345678;Root=1-67891233-abcdef012345678912345678
    faas.invoked_name
    string
    experimental
    The name of the invoked function.
    my-function
    faas.invoked_provider
    string
    experimental
    The cloud provider of the invoked function. Will be equal to the invoked function's cloud.provider resource attribute.
    alibaba_cloud
    faas.invoked_region
    string
    experimental
    The cloud region of the invoked function. 1
    eu-central-1
    1

    Will be equal to the invoked function's cloud.region resource attribute.

    HTTP Spans

    Semantic conventions for HTTP client and server spans. They can be used for HTTP and HTTPS schemes and various HTTP versions like 1.1, 2, and SPDY.

    Common fields

    The common fields listed in this section apply to both HTTP clients and servers in addition to the specific fields listed in the HTTP client and HTTP server sections below.

    Attribute
    Type
    Description
    Examples
    http.request.body.size
    long
    stable
    The size of the request payload body in bytes. This is the number of bytes transferred excluding headers and is often, but not always, present as the Content-Length header. For requests using transport encoding, this should be the compressed size.
    3495
    http.request.header.__key__
    string
    stable
    HTTP request headers, __key__ being the lowercase HTTP header name, for example "http.request.header.accept-encoding". The value is a string. If multiple headers have the same name or multiple header values, the values will be comma-separated into a single string.
    Tags: sensitive-spans
    https://www.foo.bar/; gzip, deflate, br; 1.2.3.4, 1.2.3.5
    http.request.method
    string
    stable
    HTTP request method.
    GET; POST; HEAD
    http.response.body.size
    long
    stable
    The size of the response payload body in bytes. This is the number of bytes transferred excluding headers and is often, but not always, present as the Content-Length header. For requests using transport encoding, this should be the compressed size.
    3495
    http.response.header.__key__
    string
    stable
    HTTP response headers, __key__ being the lowercase HTTP header name, for example, "http.response.header.content-type". The value is a string. If multiple headers have the same name or multiple header values, the values will be comma-separated into a single string.
    909; text/html; charset=utf-8; abc, def
    http.response.status_code
    long
    200
    network.protocol.name
    string
    stable
    OSI Application Layer or non-OSI equivalent.
    amqp; http; mqtt
    network.protocol.version
    string
    experimental
    Version of the application layer protocol used.
    1.1; 3.1.1

    HTTP client

    This span type represents an outbound HTTP request.

    For an HTTP client span, span.kind is client.

    Attribute
    Type
    Description
    Examples
    server.address
    string
    stable
    Host identifier of the "URI origin" HTTP request is sent to.
    example.com
    server.port
    long
    stable
    Port identifier of the "URI origin" HTTP request is sent to.
    65123; 80
    server.resolved_ips
    ipAddress[]
    stable
    A list of IP addresses that are the result of DNS resolution of server.address.
    [194.232.104.141, 2a01:468:1000:9::140]
    url.full
    string
    stable
    Absolute URL describing a network resource according to RFC3986.
    Tags: sensitive-spans
    https://www.foo.bar/docs/search?q=OpenTelemetry#SemConv

    HTTP server

    This span type represents an inbound HTTP request.

    For an HTTP server span, span.kind MUST be server.

    Attribute
    Type
    Description
    Examples
    client.ip
    ipAddress
    experimental
    IP address of the original client (IPv4 or IPv6) making the request. This request might have passed several proxies or load balancers. The client IP is the result of resolving the socket connection, X-Forward-For, and other headers.
    Tags: sensitive-spans
    194.232.104.141; 2a01:468:1000:9::140
    http.route
    string
    stable
    The matched route (path template in the format used by the respective server framework).
    /users/:userID?; Home/Index/{id?}
    server.address
    string
    stable
    Name of the local HTTP server that received the request.
    example.com
    server.port
    long
    stable
    Logical server port number.
    65123; 80
    url.path
    string
    stable
    The URI path component.
    /docs/search
    url.query
    string
    stable
    The URI query component.
    Tags: sensitive-spans
    q=OpenTelemetry
    url.scheme
    string
    stable
    The URI scheme component identifying the used protocol.
    https; ftp; telnet

    Messaging Spans

    Common attributes

    Attribute
    Type
    Description
    Examples
    messaging.batch.message_count
    long
    experimental
    The number of messages sent, received, or processed in the scope of the batching operation.
    1; 2; 3
    messaging.client.id
    string
    experimental
    A unique identifier for the client that consumes or produces a message.
    aclient; myhost@68d46b89c9-c29qc
    messaging.message.body.size
    long
    experimental
    The (uncompressed) size of the message payload in bytes.
    2738
    messaging.message.conversation_id
    string
    experimental
    The conversation ID identifying the conversation to which the message belongs, represented as a string. Sometimes called "Correlation ID".
    MyConversationId
    messaging.message.header.__key__
    record
    experimental
    The message headers, __key__ being the message header/attribute name, for example, "messaging.message.header.ExtendedPayloadSize". The data type of the value depends on the attribute.
    1024, "my-eu-bucket-3", ["a", "b"]
    messaging.message.id
    string
    experimental
    A value used by the messaging system as an identifier for the message, represented as a string.
    452a7c7c7c7048c2f887f61572b18fc2
    messaging.operation.type
    string
    experimental
    A string identifying the kind of messaging operation. 1
    peek
    messaging.system
    string
    experimental
    An identifier for the messaging system. See below for a list of well-known identifiers.
    kafka; rabbitmq
    network.protocol.name
    string
    stable
    OSI Application Layer or non-OSI equivalent.
    amqp; http; mqtt
    network.transport
    string
    inproc
    server.address
    string
    stable
    Logical server hostname, matches server FQDN if available, and IP or socket address if FQDN is not known. 3
    example.com
    server.port
    long
    stable
    Logical server port number.
    65123; 80
    server.resolved_ips
    ipAddress[]
    stable
    A list of IP addresses that are the result of DNS resolution of server.address.
    [194.232.104.141, 2a01:468:1000:9::140]
    1

    If a custom value is used for messaging.operation.type, it MUST be of low cardinality.

    2

    Only necessary when the server.* attributes don't apply.

    3

    This should be the IP/hostname of the broker (or other network-level peer) this specific message is sent to/received from.

    messaging.operation.type has the following list of well-known values. If one of them applies, then the respective value MUST be used, otherwise a custom value MAY be used.

    Value
    Description
    peek
    A message is received from a destination by a message consumer/server but left there.
    process
    A message previously received from a destination is processed by a message consumer/server.
    publish
    A message is sent to a destination by a message producer/client.
    receive
    A message is received from a destination by a message consumer/server.

    messaging.system has the following list of well-known values. If one of them applies, then the respective value MUST be used, otherwise a custom value MAY be used.

    Value
    Description
    activemq
    ActiveMQ
    artemis
    ActiveMQ Artemis
    aws_eventbridge
    Amazon EventBridge
    aws_sns
    Amazon Simple Notification Service (SNS)
    aws_sqs
    Amazon Simple Queue Service (SQS)
    azure_eventgrid
    Azure Event Grid
    azure_eventhubs
    Azure Event Hubs
    azure_servicebus
    Azure Service Bus
    gcp_pubsub
    Google Cloud Pub/Sub
    hornetq
    HornetQ
    jms
    Java Message Service
    kafka
    Apache Kafka
    mqseries
    IBM MQ
    msmq
    MSMQ
    rabbitmq
    RabbitMQ
    rocketmq
    Apache RocketMQ
    sag_webmethods_is
    Software AG, webMethods Integration Server
    tibco_ems
    Tibco EMS
    weblogic
    Oracle WebLogic
    websphere
    IBM WebSphere Application Server

    network.transport has the following list of well-known values. If one of them applies, then the respective value MUST be used, otherwise a custom value MAY be used.

    Value
    Description
    inproc
    In-process communication. 1
    other
    Something else (non-IP-based).
    pipe
    Named or anonymous pipe.
    tcp
    TCP
    udp
    UDP
    unix
    Unix domain socket.
    1

    Signals that there is only in-process communication not using a "real" network protocol in cases where network attributes would typically be expected. Usually, all other network attributes can be left out.

    Producer spans

    A producer of a message should set the span kind to producer unless it synchronously waits for a response; then it should use client.

    The following additional attributes describe message producer operations.

    Attribute
    Type
    Description
    Examples
    messaging.destination.kind
    string
    experimental
    The kind of message destination
    queue; topic
    messaging.destination.manager_name
    string
    experimental
    The destination's manager name 1
    MyBroker
    messaging.destination.name
    string
    experimental
    The message destination name 2
    MyQueue; MyTopic
    messaging.destination.temporary
    boolean
    experimental
    A boolean that is true if the message destination is temporary and might not exist anymore after messages are processed.
    1

    Manager name SHOULD uniquely identify the broker.

    2

    Destination name SHOULD uniquely identify a specific queue, topic or other entity within the broker.

    messaging.destination.kind MUST be one of the following:

    Value
    Description
    queue
    A message sent to a queue
    topic
    A message sent to a topic

    Consumer spans

    The consumer of a message should set the span kind to consumer unless it consistently sends back a reply that is directed to the producer of the message (as opposed to e.g., a queue on which the producer happens to listen): then it should use server.

    The following additional attributes describe message consumer operations.

    Attribute
    Type
    Description
    Examples
    messaging.source.kind
    string
    experimental
    The kind of message source
    queue; topic
    messaging.source.manager_name
    string
    experimental
    The source's manager name 1
    MyBroker
    messaging.source.name
    string
    experimental
    The message source name 2
    MyQueue; MyTopic
    messaging.source.temporary
    boolean
    experimental
    A boolean that is true if the message source is temporary and might not exist anymore after messages are processed.
    1

    Manager name SHOULD uniquely identify the broker.

    2

    Source name SHOULD uniquely identify a specific queue, topic, or other entity within the broker.

    messaging.source.kind MUST be one of the following:

    Value
    Description
    queue
    A message received from a queue
    topic
    A message received from a topic

    Akka Messaging

    Akka Producer

    Sender side via ActorRef.tell() or ActorSelection.tell() is represented by a span, with span.kind set to producer.

    Attribute
    Type
    Description
    Examples
    messaging.akka.actor.path
    string
    experimental
    Path to actor inside actor system.
    /system/log1-Logging$DefaultLogger; /remote/akka.tcp/RequesterSystem@localhost:52133/user/requestActor/$a
    messaging.akka.actor.system
    string
    experimental
    Name of the actor system.
    RequesterSystem; ResponseSystem
    messaging.akka.message.type
    string
    experimental
    Fully qualified type name of the message.
    java.lang.String; akka.event.Logging$Info2; com.acme.twosuds.ResponseActor$RequestMessage
    messaging.message.body.size
    long
    experimental
    The (uncompressed) size of the message payload in bytes.
    2738
    server.address
    string
    stable
    Logical server hostname, matches server FQDN if available, and IP or socket address if FQDN is not known.
    example.com
    server.port
    long
    stable
    Logical server port number.
    65123; 80
    server.resolved_ips
    ipAddress[]
    stable
    A list of IP addresses that are the result of DNS resolution of server.address.
    [194.232.104.141, 2a01:468:1000:9::140]

    Akka Consumer

    The receiver side via ActorCell.invoke() (inproc) or Actor.receive() (tcp) is represented by a span, with span.kind set to consumer.

    Attribute
    Type
    Description
    Examples
    messaging.akka.actor.kind
    string
    experimental
    Name of the top-level actor. See The Akka actor hierarchy 1
    system; user
    messaging.akka.actor.path
    string
    experimental
    Path to actor inside actor system. 2
    /system/log1-Logging$DefaultLogger; /remote/akka.tcp/RequesterSystem@localhost:52133/user/requestActor/$a
    messaging.akka.actor.system
    string
    experimental
    Name of the actor system. 3
    RequesterSystem; ResponseSystem
    messaging.akka.actor.type
    string
    experimental
    Fully qualified type name of actor. 4
    com.acme.RespondingActor
    messaging.akka.message.type
    string
    experimental
    Fully qualified type name of the message.
    java.lang.String; akka.event.Logging$Info2; com.acme.twosuds.ResponseActor$RequestMessage
    messaging.message.body.size
    long
    experimental
    The (uncompressed) size of the message payload in bytes.
    2738
    network.transport
    string
    stable
    For Akka local, network.transport is set to inproc; for Akka remoting, it's set to tcp.
    inproc; tcp
    server.address
    string
    stable
    Logical server hostname, matches server FQDN if available, and IP or socket address if FQDN is not known. 5
    example.com
    server.port
    long
    stable
    Logical server port number. 6
    65123; 80
    1

    Unavailable in case of network.transport = tcp

    2

    Unavailable in case of network.transport = inproc

    3

    Unavailable in case of network.transport = inproc

    4

    Unavailable in case of network.transport = tcp

    5

    Unavailable in case of network.transport = inproc

    6

    Unavailable in case of network.transport = inproc

    network.transport has the following list of well-known values. If one of them applies, then the respective value MUST be used, otherwise a custom value MAY be used.

    Value
    Description
    inproc
    In-process communication. 1
    other
    Something else (non-IP-based).
    pipe
    Named or anonymous pipe.
    tcp
    TCP
    udp
    UDP
    unix
    Unix domain socket.
    1

    Signals that there is only in-process communication not using a "real" network protocol in cases where network attributes would typically be expected. Usually, all other network attributes can be left out.

    Kafka Messaging

    This convention extends the default semantic convention for messaging systems.

    Kafka Producer

    Attribute
    Type
    Description
    Examples
    messaging.destination.partition.id
    string
    experimental
    String representation of the partition ID the message is sent to or received from.
    1
    messaging.kafka.message.key
    string
    experimental
    The key property of the message.
    mykey
    messaging.kafka.message.tombstone
    boolean
    experimental
    A boolean that is true if the message is a tombstone. 1
    true
    messaging.kafka.offset
    long
    experimental
    The offset of the message.
    42
    1

    If the message is a tombstone, the value is true. When missing, the value is assumed to be false.

    Kafka Consumer

    Attribute
    Type
    Description
    Examples
    messaging.consumer.group.name
    string
    experimental
    The name of the consumer group with which a consumer is associated. 1
    my-group; indexer
    messaging.destination.partition.id
    string
    experimental
    String representation of the partition ID the message is sent to or received from.
    1
    messaging.kafka.message.key
    string
    experimental
    The key property of the message.
    mykey
    messaging.kafka.message.tombstone
    boolean
    experimental
    A boolean that is true if the message is a tombstone. 2
    true
    messaging.kafka.offset
    long
    experimental
    The offset of the message.
    42
    2

    If the message is a tombstone, the value is true. When missing, the value is assumed to be false.

    RPC Spans

    Fields that describe remote procedure calls (also called "remote method invocations" / "RMI") with spans.

    A remote procedure call is described by two separate spans, one on the client and one on the server side.

    For outgoing requests, the SpanKind MUST be set to client and for incoming requests to server.

    Common Fields

    Attribute
    Type
    Description
    Examples
    network.protocol.name
    string
    stable
    The protocol that is used in the remote procedure call or web service. It can be omitted if it matches with rpc.system. See below for a list of well-known identifiers.
    grpc; rest_http; soap; dotnet_remoting; hessian; java_rmi; json_rpc
    rpc.method
    string
    experimental
    The name of the (logical) method being called 1
    exampleMethod
    rpc.namespace
    string
    experimental
    The namespace of the method being called. In SOAP, it would be the XML namespace.
    tempuri.org
    rpc.service
    string
    experimental
    The full (logical) name of the service being called, including its package name, if applicable. 2
    myservice.EchoService
    rpc.system
    string
    experimental
    A string identifying the remoting system or framework. See below for a list of well-known identifiers.
    apache_cxf; dotnet_wcf; grpc; jax_ws
    server.address
    string
    stable
    Logical server hostname, matches server FQDN if available, and IP or socket address if FQDN is not known.
    example.com
    server.port
    long
    stable
    Logical server port number.
    65123; 80
    server.resolved_ips
    ipAddress[]
    stable
    A list of IP addresses that are the result of DNS resolution of server.address.
    [194.232.104.141, 2a01:468:1000:9::140]
    1

    This is the logical name of the method from the RPC interface perspective, which can be different from the name of any implementing method/function. The code.function attribute may be used to store the latter (e.g., method executing the call on the server side, RPC client stub method on the client side).

    2

    This is the logical name of the service from the RPC interface perspective, which can be different from the name of any implementing class. The code.namespace attribute may be used to store the latter (despite the attribute name, it may include a class name, e.g., class with method executing actually executing the call on the server side, RPC client stub class on the client side).

    RPC server

    This span type represents an inbound RPC request.

    For an RPC server span, SpanKind is Server.

    Attribute
    Type
    Description
    Examples
    code.function
    string
    experimental
    The method or function name, or equivalent (usually the rightmost part of the code unit's name). Represents the name of the function that is represented by this span. 1
    serveRequest
    code.invoked.function
    string
    experimental
    Like code.function, only it represents the function that was active when a span has been started. Typically, it's the function that has been instrumented. The spans duration does not reflect the duration of this function execution. It should only be set if it differs from code.function.
    invoke
    code.invoked.namespace
    string
    experimental
    Like code.namespace, only it represents the namespace of the function that was active when a span has been started. Typically, it's the function that has been instrumented. It should only be set if it differs from code.namespace.
    com.sun.xml.ws.server.InvokerTube$2
    code.namespace
    string
    experimental
    The namespace within which code.function is defined. Usually, the qualified class or module name, such that code.namespace + some separator + code.function forms a unique identifier for the code unit. 2
    com.example.MyHttpService
    network.transport
    string
    tcp; udp
    1

    In the case of RPC, code.function represents the handler function that processes the RPC.

    2

    In the case of RPC, code.namespace represents the namespace of the handler function that processes the RPC.

    gRPC

    Additional conventions for remote procedure calls via [gRPC][].

    rpc.framework and rpc.protocol MUST be set to "grpc".

    gRPC Attributes

    Attribute
    Type
    Description
    Examples
    rpc.grpc.status_code
    long
    experimental
    The numeric status code of the gRPC request.

    gRPC

    RMI

    Additional conventions for remote procedure calls via [RMI][].

    rpc.framework and rpc.protocol MUST be set to "java-rmi".

    RMI Fields

    Attribute
    Type
    Description
    Examples
    rpc.rmi.registry
    string
    experimental
    The URL of a rmi endpoint.
    Calculator

    RMI

    z/OS Connect EE Spans

    z/OS Connect EE (Enterprise Edition) is an IBM product that exposes applications and data in z/OS subsystems such as CICS, IMS, or MQ via a RESTful API. The z/OS Connect EE (v3.0) implementation is built on the WebSphere Application Server for the z/OS Liberty profile.

    Attribute
    Type
    Description
    Examples
    ibm.cics.program
    string
    resource experimental
    The name of the CICS program. 1
    EDUCHAN
    zosconnect.api.description
    string
    experimental
    The z/OS Connect API description.
    The API for the CICS catalog manager sample application.
    zosconnect.api.name
    string
    experimental
    The z/OS Connect API name.
    catalog
    zosconnect.api.version
    string
    experimental
    The z/OS Connect API version.
    1.0.0
    zosconnect.request.body.size
    long
    experimental
    The size of the request payload in bytes.
    234
    zosconnect.request.id
    long
    experimental
    The z/OS Connect request ID.
    2215
    zosconnect.request.type
    string
    experimental
    The type of the REST request. 2
    ADMIN
    zosconnect.response.body.size
    long
    experimental
    The size of the response payload in bytes.
    125
    zosconnect.service.description
    string
    experimental
    The z/OS Connect service description.
    EDUCHAN service using the CICS Service Provider
    zosconnect.service.name
    string
    experimental
    The z/OS Connect service name.
    placeOrder
    zosconnect.service.provider.name
    string
    experimental
    The service provider name.
    CICS-1.0
    zosconnect.service.version
    string
    experimental
    The z/OS Connect service version.
    2.0
    zosconnect.sor.identifier
    string
    experimental
    The system of record identifier. The format differs depending on the SOR type. 3
    localhost:8080
    zosconnect.sor.reference
    string
    experimental
    The system of record reference.
    cicsConn
    zosconnect.sor.resource
    string
    experimental
    Identifier for the resource invoked on the system of record. The format differs depending on the SOR type. 4
    01,DFH0XCMN
    zosconnect.sor.type
    string
    experimental
    The system of record type.
    CICS
    1

    Only applicable if zosconnect.sor.type is CICS

    zosconnect.request.type MUST be one of the following:

    Value
    Description
    ADMIN
    admin
    API
    api
    SERVICE
    service
    UNKNOWN
    unknown

    zosconnect.sor.type MUST be one of the following:

    Value
    Description
    CICS
    cics
    IMS
    ims
    MQ
    mq
    REST
    rest
    WOLA
    wola

    z/OS Spans

    The semantic conventions for z/OS client and server spans. You can use them for CICS and IMS schemes.

    Common Attributes

    The common attributes listed in this section apply to both CICS and IMS clients and servers, in addition to the specific attributes listed in the CICS common, CICS client, and CICS server sections below.

    Attribute
    Type
    Description
    Examples
    zos.transaction.call_type
    string
    experimental
    The type of transaction call that was invoked.
    CTG
    zos.transaction.job_name
    string
    experimental
    The jobname of the z/OS address space that the transaction executed in.
    CICSAOR0; CTGATM00; IMSCR15
    zos.transaction.lpar_name
    string
    experimental
    The name of the LPAR that the transaction executed on.
    S0W1; ABCD

    CICS common

    Attribute
    Type
    Description
    Examples
    cics.transaction.system_id
    string
    experimental
    The system ID of the CICS region that this transaction executed on.
    C259; CICS
    cics.transaction.task_id
    long
    experimental
    The CICS task ID of this transaction.
    1234

    CICS client

    This span type represents an outbound CICS request.

    For a CICS client span, span.kind is client.

    Attribute
    Type
    Description
    Examples
    cics.transaction.system_id
    string
    experimental
    The system ID of the server CICS region that will contain the started server transaction.
    C259; CICS
    zos.transaction.lpar_name
    string
    experimental
    The LPAR name that hosts the CICS region that will contain the started server transaction.
    S0W1; ABCD

    CICS server

    This span type represents an inbound CICS request.

    For a CICS server span, span.kind MUST be server.

    Attribute
    Type
    Description
    Examples
    cics.transaction.system_id
    string
    experimental
    The system ID of the client CICS region that triggered this transaction.
    C259; CICS
    zos.transaction.lpar_name
    string
    experimental
    The LPAR name that hosts the client CICS region.
    S0W1; ABCD