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feat(om2): expand Number description with float64 and NaN details #2928

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feat(om2): expand Number description with float64 and NaN details #2928

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4 changes: 3 additions & 1 deletion docs/specs/om/open_metrics_spec_2_0.md
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Expand Up @@ -130,7 +130,9 @@ Metric values in OpenMetrics MUST be either Number or CompositeValue.

##### Number

Number value MUST be either floating point or integer. Note that ingestors of the format MAY only support float64. The non-real values NaN, +Inf and -Inf MUST be supported. NaN value MUST NOT be considered a missing value, but it MAY be used to signal a division by zero.
Number value MUST be either floating point or integer.

Note that ingestors of the format MAY only support float64, for example Go's `float64` which is an IEEE 754-2008 double-precision (binary64) floating-point number with approximately 15–17 significant decimal digits of precision. The non-real values NaN, +Inf and -Inf MUST be supported. NaN value MUST NOT be considered a missing value, but it MAY be used to signal a division by zero or any other mathematical operation that yields an undefined or indeterminate result.

Booleans MUST be represented as a Number value where `1` is true and `0` is false.

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