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

[ http://tools.oasis-open.org/issues/browse/ODATA-126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=32830#action_32830 ] 

Ralf Handl commented on ODATA-126:
----------------------------------

The current model (picture and edmx) are checked into SVN:
- https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/examples/MetadataService/MetaModel.edmx?sc=1 (V3 format :-)
- https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/examples/MetadataService/EntityDesignerDiagram.png?op=dl&rev=0&isdir=0

ToDo:
- Convert Edmx to V4 format (could someone write an XSL translation for that?) 
- Transform entity types AnnotationsElement and ParameterType into complex types and targeting navigation properties into complex properties
- Add Documentation complex property type to all approprioate entity types

Feedback is highly welcome!


> 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
>            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
>  - ValueAnnotation
>  - ...
> Entity sets
>  - EntitySets
>  - EntityTypes
>  - Properties
>  - VallueAnnotations
>  - ...
> 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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