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docs: document single argument variant of tracingBaggageToTag #3247

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Sep 24, 2024
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docs: document single argument variant of tracingBaggageToTag #3247

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10 changes: 9 additions & 1 deletion docs/reference/filters.md
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Expand Up @@ -3303,11 +3303,19 @@ Syntax:
tracingBaggageToTag("<baggage_item_name>", "<tag_name>")
```

Example: If a trace consists of baggage item named `foo` with a value `bar`. Adding below filter will add a tag named `baz` with value `bar`
Example:

If a trace consists of a baggage item named `foo` with a value of `bar`,
then adding the filter below will add a tag named `baz` with the value `bar`:
```
tracingBaggageToTag("foo", "baz")
```

A single-argument variant uses the baggage item name as the tag name, i.e., it will add a tag named `foo` with the value `bar`:
```
tracingBaggageToTag("foo")
```

### stateBagToTag

This filter sets an opentracing tag from the filter context (state bag).
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