How can app handle unrelased release date in metada

[ghost]

I've noticed that some app developers use a metadata file to prepare release notes for versions that have not yet been released.

      <release version="3.1.0" date="2023-12-XX">
        <description translatable="no">
          <p>This is a minor release of Impression with a few small improvements.</p>
        </description>
      </release>

Of course, appstreamcli can't validate these dates.

W: @app-id@:68: invalid-iso8601-date 2023-12-XX
   The AppStream specification requires a complete, ISO 8601 date string with at least
   day-granularity to denote dates. Please ensure the date string is valid.

Could you offer me a way that developers can use a metadata file to prepare release notes without breaking validation?

[ximion]

We can potentially ignore the date requirement if the release type is snapshot, so if that is set, people can just leave out the date and add it once the release is ready...