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Increase metric name maximum length from 63 to 255 characters #3648

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merged 5 commits into from
Aug 10, 2023
Merged

Increase metric name maximum length from 63 to 255 characters #3648

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dd4145c
Increase metric name maximum length from 63 to 255 characters
trask Aug 8, 2023
414e6d0
Update PR #
trask Aug 9, 2023
a7a7efc
Merge branch 'main' into increase-metric-name-size-limit
trask Aug 9, 2023
f594ed1
Merge branch 'main' into increase-metric-name-size-limit
reyang Aug 10, 2023
0bbc3d5
Move change log entry to unreleased
trask Aug 10, 2023
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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -23,6 +23,8 @@ release.
([#3613](https://github.com/open-telemetry/opentelemetry-specification/pull/3613))
- Refine `MetricProvider.ForceFlush` and define `ForceFlush` for periodic exporting MetricReader.
([#3563](https://github.com/open-telemetry/opentelemetry-specification/pull/3563))
- Increase metric name maximum length from 63 to 255 characters.
([#9999](https://github.com/open-telemetry/opentelemetry-specification/pull/9999))
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### Logs

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4 changes: 2 additions & 2 deletions specification/metrics/api.md
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Expand Up @@ -202,7 +202,7 @@ The instrument name syntax is defined below using the [Augmented Backus-Naur
Form](https://tools.ietf.org/html/rfc5234):

```abnf
instrument-name = ALPHA 0*62 ("_" / "." / "-" / ALPHA / DIGIT)
instrument-name = ALPHA 0*254 ("_" / "." / "-" / ALPHA / DIGIT)

ALPHA = %x41-5A / %x61-7A; A-Z / a-z
DIGIT = %x30-39 ; 0-9
Expand All @@ -213,7 +213,7 @@ DIGIT = %x30-39 ; 0-9
* The first character must be an alphabetic character.
* Subsequent characters must belong to the alphanumeric characters, '_', '.',
and '-'.
* They can have a maximum length of 63 characters.
* They can have a maximum length of 255 characters.

#### Instrument unit

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