As per the recent specs change : * Increase max instrument name length from 63 to 255: https://github.com/open-telemetry/opentelemetry-specification/pull/3648 * Instrument names can have "/" character: https://github.com/open-telemetry/opentelemetry-specification/pull/3684 Then update spec compliance matrix https://github.com/open-telemetry/opentelemetry-specification/blob/main/spec-compliance-matrix.md