adding clayers

[jkrech]

@JonatanAntoni the failing schema check if for a pack that should not been in the public index as it has an incorrect version in the release history:

<release date="2022-09-26" version="1.9.9a" url="[https://github.com/GorgonMeducer/perf_counter/raw/77134b23f9259e3ec4215eb30096c3474ed1d01d/cmsis-pack/GorgonMeducer.perf_counter.1.9.9a.pack">](https://github.com/GorgonMeducer/perf_counter/raw/77134b23f9259e3ec4215eb30096c3474ed1d01d/cmsis-pack/GorgonMeducer.perf_counter.1.9.9a.pack%22%3E)
      - Improve the way to import systick wrapper
      - Add get_system_us to avoid 64bit integer divider.
      - Minor Update
    </release>

Need to investigate why this was not blocked by the importer but this should not block this PR.

[silviooliva]

Hello @jkrech, maybe the clayerselement should be also added to the list of the package child elements in the table here: https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/pdsc_package_pg.html#element_package

Also, in the table of the /package/clayers/clayer, I think that the Parent is clayers (not examples) and the Chain is /package/clayers.

As last thing, just for uniformity, maybe also the /package/clayers/clayer/description element should be described (and added to element list in the Usage and Description tab).

BR

[jkrech]

@silviooliva thanks a lot for the valuable feedback. I have created another PR https://github.com/Open-CMSIS-Pack/Open-CMSIS-Pack-Spec/pull/214

• adding clayers to table of package child elements
• correcting the parent of clayer from examples to clayers
• adding missing condition attribute in clayer element (@ReinhardKeil)

Regarding your suggestion to add 'description' to the layout for consistency, I have not done that, as we have not done this for child elements that are not of complex type. See e.g. examples does not have description listed either. Description is a simple element of type 'xs:string' and does not have sub elements itself.

[silviooliva]

@silviooliva thanks a lot for the valuable feedback. I have created another PR #214

@jkrech, thank you for the fix.

Regarding your suggestion to add 'description' to the layout for consistency, I have not done that, as we have not done this for child elements that are not of complex type. See e.g. examples does not have description listed either. Description is a simple element of type 'xs:string' and does not have sub elements itself.

Ok.