[OASIS Issue Tracker] (ODATA-1291) ETags for Collections

Ralf Handl created ODATA-1291:
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             Summary: ETags for Collections
                 Key: ODATA-1291
                 URL: https://issues.oasis-open.org/browse/ODATA-1291
             Project: OASIS Open Data Protocol (OData) TC
          Issue Type: Improvement
          Components: JSON Format, Vocabularies
    Affects Versions: V4.01_CS01
            Reporter: Ralf Handl
             Fix For: V4.01_CS02


With ODATA-981 we clarified that collections can also have ETags and clients must specify {{if-match}} when posting to the collection.

What's missing is
* an annotation in $metadata to tell clients up-front which collections, especially collection-valued navigation properties, use optimistic concurrency control
* a way to transport ETags for collection-valued navigation properties in responses to the "container" entity




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