add optional configuration for prometheus exporter

CHANGELOG.md

@@ -48,6 +48,8 @@ release.
   ([#3761](https://github.com/open-telemetry/opentelemetry-specification/pull/3761))
 - Clarifications and flexibility in Exemplar speicification.
   ([#3760](https://github.com/open-telemetry/opentelemetry-specification/pull/3760))
+- Add optional configuration for Prometheus exporters to optionally remove unit and type suffixes
+  ([#3777](https://github.com/open-telemetry/opentelemetry-specification/pull/3777))
 
 ### Logs
 

specification/metrics/sdk_exporters/prometheus.md

@@ -31,3 +31,9 @@ By default, it MUST NOT add any resource attributes as metric attributes.
 The configuration SHOULD allow the user to select which resource attributes to copy (e.g.
 include / exclude or regular expression based). Copied Resource attributes MUST NOT be
 excluded from target_info.
+
+A Prometheus Exporter MAY support a configuration option to produce metrics without a [unit suffix](../../compatibility/prometheus_and_openmetrics.md#metric-metadata)
+or UNIT metadata. The option MAY be named `without_units`, and MUST be `false` by default.
+
+A Prometheus Exporter MAY support a configuration option to produce metrics without a [type suffix](../../compatibility/prometheus_and_openmetrics.md#metric-metadata).
+The option MAY be named `without_type_suffix`, and MUST be `false` by default.