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‎develop-docs/sdk/telemetry/spans/span-protocol.mdx‎

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@@ -4,64 +4,191 @@ title: Span Protocol
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<Alert level="info">
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This document uses key words such as "MUST", "SHOULD", and "MAY" as defined in [RFC 2119](https://www.ietf.org/rfc/rfc2119.txt) to indicate requirement levels.
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Furthermore, this is work in progress and does not represent the final state.
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</Alert>
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The SDK must implement a new "span" envelope item, which is used to emit an entire span tree (one root span and its children).
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The payload of each envelope item follows the [OpenTelemetry Protocol](https://opentelemetry.io/docs/specs/otel/protocol/).
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The SDK must implement a new "span v2" envelope item, which is used to emit spans to Sentry.
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```
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{
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"event_id":"9ec79c33ec9942ab8353589fcb2e04dc"
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}
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{
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"type": "span"
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}
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{
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"traceId": "32d3c7cb501fbddbe3ce1016a72d50b5",
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"spanId": "e91d37480970523b",
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"name": "GET /",
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"startTime": "1544712660",
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"endTime": "1544712680",
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"attributes": [
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{
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"key": "sentry.op",
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"value": {
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"stringValue": "http.sever",
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}
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},
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{
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"key": "http.response.status_code",
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"value": {
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"intValue": "200",
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}
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}
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]
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}
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## Span v2 Envelope Item Header
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The envelope item header must contain the following properties:
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```json
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{
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"type": "span"
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"type": "span",
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"item_count": 2,
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"content_type": "application/vnd.sentry.items.span.v2+json"
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}
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```
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## Span v2 Envelope Item Payload
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The envelope item payload must contain an `items` array with span one and up to 1000 span objects:
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```json
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{
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"traceId": "32d3c7cb501fbddbe3ce1016a72d50b5",
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"spanId": "6b22b3af586e777a",
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"parentSpanId": "e91d37480970523b",
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"name": "UserMiddleware",
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"startTimeUnix": "1544712665",
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"endTimeUnix": "1544712675",
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"attributes": [
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{
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"key": "sentry.op",
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"value": {
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"stringValue": "middleware.handle",
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}
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},
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{
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"key": "user.email",
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"value": {
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"stringValue": "[email protected]",
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}
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}
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]
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"items": [
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{
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"trace_id": "6cf173d587eb48568a9b2e12dcfbea52",
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"parent_span_id": null,
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"span_id": "438f40bd3b4a41ee",
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"name": "GET /users",
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"status": "ok",
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"is_remote": true,
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"kind": "server",
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"start_timestamp": 1742921669.158209,
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"end_timestamp": 1742921669.180536,
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"attributes": {
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"sentry.release": {
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"type": "string",
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"value": "1.0.0"
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},
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"sentry.environment": {
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"type": "string",
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"value": "local"
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},
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"sentry.platform": {
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"type": "string",
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"value": "php"
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},
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"sentry.sdk.name": {
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"type": "string",
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"value": "sentry.php"
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},
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"sentry.sdk.version": {
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"type": "string",
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"value": "4.10.0"
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},
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"sentry.transaction_info.source": {
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"type": "string",
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"value": "route"
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},
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"sentry.origin": {
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"type": "string",
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"value": "auto"
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},
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"server.address": {
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"type": "string",
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"value": "127.0.0.1"
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},
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"http.response.status_code": {
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"type": "integer",
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"value": 200
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},
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"links": [
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{
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"span_id": "6c71fc6b09b8b716",
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"trace_id": "627a2885119dcc8184fae7eef09438cb",
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"sampled": true,
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"attributes": {
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"sentry.link.type": {
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"type": "string",
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"value": "previous_trace"
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}
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}
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}
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]
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},
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},
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{
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"trace_id": "6cf173d587eb48568a9b2e12dcfbea52",
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"parent_span_id": "438f40bd3b4a41ee",
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"span_id": "f1196292f76e45c0",
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"name": "app.handle",
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"status": "ok",
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"is_remote": false,
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"kind": "server",
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"start_timestamp": 1742921669.178306,
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"end_timestamp": 1742921669.180484,
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"attributes": {
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"sentry.origin": {
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"type": "string",
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"value": "auto"
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}
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}
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}
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]
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}
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```
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## Span v2 Protocol Properties
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### Envelope Item Header Properties
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| Property | Type | Required | Description |
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|----------|------|----------|-------------|
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| `type` | string | Yes | Must be set to `"span"` to identify this as a span envelope item |
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| `item_count` | integer | Yes | Number of span items in the payload |
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| `content_type` | string | Yes | Must be set to `"application/vnd.sentry.items.span.v2+json"` |
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### Span Properties
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| Property | Type | Required | Description |
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|----------|------|----------|-------------|
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| `trace_id` | string | Yes | 32-character hexadecimal string (a valid uuid4 without dashes) |
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| `span_id` | string | Yes | 16-character hexadecimal string (a valid uuid4 without dashes) |
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| `parent_span_id` | string | No | 16-character hexadecimal string (a valid uuid4 without dashes) |
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| `name` | string | Yes | A low cardinality description of what the span represents (e.g., "GET /users", "database.query") |
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| `status` | string | Yes | Status of the span operation. Either `"ok"` or `"error"` |
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| `is_remote` | boolean | Yes | Whether the SpanContext creating the span was received from somewhere else or locally generated |
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| `kind` | string | Yes | The kind of span. Values: `"server"`, `"client"`, `"producer"`, `"consumer"`, `"internal"` |
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| `start_timestamp` | number | Yes | Unix timestamp (with fractional microseconds) when the span was started |
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| `end_timestamp` | number | Yes | Unix timestamp (with fractional microseconds) when the span was ended |
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| `attributes` | object | No | Key-value pairs containing additional metadata about the span |
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| `links` | array | No | Array of links connecting this span to other spans or traces |
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### Attribute Object Properties
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Attributes are stored as key-value pairs where each value is an object with type information:
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| Property | Type | Required | Description |
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|----------|------|----------|-------------|
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| `type` | string | Yes | The data type of the attribute value. Values: `"string"`, `"integer"`, `"float"`, `"boolean"` |
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| `value` | any | Yes | The actual attribute value, must match the specified type |
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| `unit` | string | No | The unit of the attribute value. Example values: `"ms"`, `"s"`, `"bytes"`, `"count"`, `"percent"` |
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#### Common Attribute Keys
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| Attribute Key | Type | Description |
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|---------------|------|-------------|
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| `sentry.release` | string | The release version of the application |
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| `sentry.environment` | string | The environment name (e.g., "production", "staging", "development") |
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| `sentry.platform` | string | The platform/language (e.g., "php", "javascript", "python") |
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| `sentry.sdk.name` | string | Name of the Sentry SDK (e.g., "sentry.php", "sentry.javascript") |
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| `sentry.sdk.version` | string | Version of the Sentry SDK |
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See [Sentry Conventions](https://github.com/getsentry/sentry-conventions/) for a full list of supported attributes.
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### Link Object Properties
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Links connect spans to other spans or traces, enabling distributed tracing:
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| Property | Type | Required | Description |
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|----------|------|----------|-------------|
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| `span_id` | string | Yes | 16-character hexadecimal string (a valid uuid4 without dashes) |
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| `trace_id` | string | Yes | 32-character hexadecimal string (a valid uuid4 without dashes) |
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| `sampled` | boolean | No | Whether the linked trace was sampled |
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| `attributes` | object | No | Additional metadata about the link relationship |
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#### Link Attribute Keys
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| Attribute Key | Type | Description |
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|---------------|------|-------------|
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| `sentry.link.type` | string | Type of link relationship (e.g., "previous_trace", "child_of", "follows_from") |
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## Data Types and Formats
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### Timestamp Format
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Timestamps use Unix time with fractional microseconds as a floating-point number:
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```
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1742921669.158209
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```
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### ID Formats
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- **Trace ID**: 32-character (128 bits) lowercase hexadecimal string (a valid uuid4 without dashes)
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- **Span ID**: 16-character (64 bits) lowercase hexadecimal string (a valid uuid4 without dashes)
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Example:
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```
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trace_id: "6cf173d587eb48568a9b2e12dcfbea52"
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span_id: "438f40bd3b4a41ee"
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```

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