| Microsoft Codename Quot;astoriaquot; |
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| CATEGORIES ABOUT MICROSOFT CODENAME QUOT;ASTORIAQUOT; | |
| windows live | |
| microsoft software | |
| data management | |
| web services | |
| ado.net data access technologies | |
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OVERVIEW Astoria Data Services exposes data, represented as Entity Data Model (EDM) objects, via web services accessed over HTTP . The data can be addressed using a REST -like URI . The Astoria service, when accessed via the HTTP GET method with such an URI, will return the data. The web service can be configured to return the data in either plain XML , JSON or RDF+XML . In the initial release, formats like RSS and ATOM are not supported, though they may be in the future. In addition, using other HTTP methods like PUT, POST or DELETE, the data can be updated as well. POST can be used to create new entities, PUT for updating an entity, and DELETE for deleting an entity. The URIs representing the data will contain the physical location of the service, as well as the service name. In addition, it will also need to specify an EDM Entity-Set or a specific entity instance, as in respectively or The former will list all entities in the ''Collection'' set whereas the latter will list only for the entity which is indexed by ''SomeArtist''. In addition, the URIs can also specify a traversal of a relationship in the Entity Data Model. For example, traverses the relationship ''Genre'' (in SQL parlance, joins with the ''Genre'' table) and retrieves all instances of ''Genre'' that are associated with the entity ''SomeSong''. Simple predicates can also be specified in the URI, like will fetch the items that are indexed by ''SomeArtist'' and had their ''release'' in ''2006''. Filtering and partition informationcan also be encoded in the URL as REFERENCES EXTERNAL LINKS |
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