[OASIS Issue Tracker] (ODATA-798) Semantic Key or Alternate Key for entity types

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

     [ https://issues.oasis-open.org/browse/ODATA-798?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ralf Handl updated ODATA-798:
-----------------------------

    Resolution: https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/vocabularies/Org.OData.Core.V1.xml?op=diff&rev=943

> Semantic Key or Alternate Key for entity types
> ----------------------------------------------
>
>                 Key: ODATA-798
>                 URL: https://issues.oasis-open.org/browse/ODATA-798
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Improvement
>          Components: OData CSDL, OData URL Conventions
>    Affects Versions: V4.0_ERRATA02
>         Environment: New Query Capabilities
>            Reporter: Ralf Handl
>            Assignee: Ralf Handl
>              Labels: Extension
>             Fix For: V4.01_WD01
>
>
> Sometimes an entity type has a technical unique key, e.g. a sequence number or a guid, as well as one or more "semantic" or "alternate" keys, e.g. a User could be identified via a UserID or alternatively via an EmailAddress, or a Person could be identified via a Country+PassportNumber combination or a Country+SSN combination.
> These "semantic" or "alternate" keys may include nullable properties (you may not know a person's SSN, but if you know it, it identifies the person), and there could be more than one of them, each consisting of a different set of properties.



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