# OpenTracing

LLMS index: [llms.txt](/llms.txt)

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## OpenTracing Attributes

Attributes used by the OpenTracing Shim layer.

**Attributes:**

| Key | Stability | Value Type | Description | Example Values |
| --- | --- | --- | --- | --- |
| <a id="opentracing-ref-type" href="#opentracing-ref-type">`opentracing.ref_type`</a> | ![Development](https://img.shields.io/badge/-development-blue) | string | Parent-child Reference type [1] | `child_of`; `follows_from` |

**[1] `opentracing.ref_type`:** The causal relationship between a child Span and a parent Span.

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`opentracing.ref_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 | Stability |
| --- | --- | --- |
| `child_of` | The parent Span depends on the child Span in some capacity | ![Development](https://img.shields.io/badge/-development-blue) |
| `follows_from` | The parent Span doesn't depend in any way on the result of the child Span | ![Development](https://img.shields.io/badge/-development-blue) |