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Subject: [OASIS Issue Tracker] Updated: (ODATA-126) Metadata as an OData service


     [ http://tools.oasis-open.org/issues/browse/ODATA-126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ralf Handl updated ODATA-126:
-----------------------------

      Proposal: 
Define CSDL schema for CSDL and allow application/atomsvc+xml and application/json as additional representations of ~/$metadata/, returning an Atom or JSON service document for accessing the metadata of the service.

~/$metadata/$metadata will return the constant schema for CSDL, and we should end the recursion there.

Chapter 15 of https://www.oasis-open.org/committees/download.php/49309/odata-v4.0-wd02-part3-csdl-2013-05-22.docx

CSDL: https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/schemas/MetadataService.edmx

Diagram: https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/examples/MetadataService/EntityDesignerDiagram.png?op=dl&rev=0&isdir=0

Accepted: https://www.oasis-open.org/committees/download.php/49325/odata-meeting-38_on-20130523-minutes.html#odata-126

  was:
Define CSDL schema for CSDL and allow application/atomsvc+xml and application/json as additional representations of ~/$metadata/, returning an Atom or JSON service document for accessing the metadata of the service.

~/$metadata/$metadata will return the constant schema for CSDL, and we should end the recursion there.

Chapter 15 of https://www.oasis-open.org/committees/download.php/49309/odata-v4.0-wd02-part3-csdl-2013-05-22.docx

CSDL: https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/schemas/MetadataService.edmx

Diagram: https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/examples/MetadataService/EntityDesignerDiagram.png?op=dl&rev=0&isdir=0

    Resolution: 
https://www.oasis-open.org/committees/download.php/49309/odata-v4.0-wd02-part3-csdl-2013-05-22.docx
https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/schemas/MetadataService.edmx

> Metadata as an OData service
> ----------------------------
>
>                 Key: ODATA-126
>                 URL: http://tools.oasis-open.org/issues/browse/ODATA-126
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: New Feature
>          Components: OData CSDL, OData Protocol , OData URL Conventions 
>    Affects Versions: V4.0_WD01
>         Environment: [Proposed]
>            Reporter: Ralf Handl
>            Assignee: Ralf Handl
>             Fix For: V4.0_WD01
>
>
> Instead of a monolithic XML metadata document the metadata could be made available as an OData service with a fixed schema:
> Entity types
>  - EntitySet
>  - EntityType
>  - Property
>  - Annotation
>  - ...
> Entity sets
>  - EntitySets
>  - EntityTypes
>  - Properties
>  - Annotations
>  - ...
> This meta-service could be accessed via a canonical URL, ideally ~/$metadata/ with $format=atom/json or a corresponding Accept header.
> This would allow accessing only parts of the metadata document the client is interested in and simplify parsing for clients: they only need to know how to interpret "normal" OData feed and entity response payloads without needing a separate metadata format.
> It would also conveniently provide a JSON format for metadata.
> Accepted: https://www.oasis-open.org/committees/download.php/48097/odata-meeting-23_on-20130130_31-F2F-minutes.html#odata-126

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