[OASIS Issue Tracker] (ODATA-1096) 9.1.4 Response Code 204 No Content: rephrase second paragraph

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

Ralf Handl created ODATA-1096:
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             Summary: 9.1.4 Response Code 204 No Content: rephrase second paragraph
                 Key: ODATA-1096
                 URL: https://issues.oasis-open.org/browse/ODATA-1096
             Project: OASIS Open Data Protocol (OData) TC
          Issue Type: Bug
          Components: Protocol
    Affects Versions: V4.01_CSD02
            Reporter: Ralf Handl
             Fix For: V4.01_CS01


The second paragraph of section 9.1.4 is a quote from RFC7231 and somewhat hard to parse. Replace it with text that expresses its intention: send an ETag only if the client can reasonably "know" the current entity representation that has not been sent in the response:

(1) For a PUT request: if the response body of a corresponding 200 response would have been identical to the request body, i.e. no server-side modification of values sent in the request body, no "calculated" values. 

(2) We could extend this to PATCH requests and if a corresponding 200 response would have consisted of
- values sent in PATCH request body, plus 
- server-side values corresponding to ETag sent in If-Match header of PATCH request (for values not sent in PATCH request body)



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