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ODataScott Hanselman

Principal Program Manager LeadMicrosoft

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“ScottGu”

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“The Gu”

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“His Gu-ness”

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“Sir”

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“Master Chief Gu”

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Cost Cutting

in VS 2010

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Cost Cutting

in VS 2010

DrivingScott Gu 

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REST

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WS-*

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WCF Data

Services

WCF

Services

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WCF Data

Services

WCF

Services

WebClient

(for now)

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SOAP

WS-SecurityWS-*

REST

AtomPubOData

WCF Data

Services

WCF

Services

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Target Scenarios

HTML + Javascript

Data (XML,JSON,…)

DLL + XAML

Data (XML,JSON,…) Data (XML,JSON,…)

Mashup UI

Data

Feeds

AJAX

Apps

Silverlight

Apps

Online

Services

Mashups

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A RESTful Interface for DataJust HTTP

• Data as resources, HTTP methods to act on it

• Leverage caching, proxies, authentication, …

Uniform URL syntax

• Every piece of information is addressable

• Predictable and flexible URL syntax

Multiple representations

• Use regular HTTP content-type negotiation

• Atom*, JSON

• *full AtomPub protocol support

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Model and Operation SemanticsUnderlying data model- Entity Data Model

- Entities Resources

- Associations Links

Operation semantics- Mapping of HTTP methods

- GET retrieve resource

- POST create resource

- PUT update resource

- DELETE delete resource

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URL Conventions

• Addressing entities and sets

• Presentation options

Entity-set /Bookmarks

Single entity /Bookmarks(123)

Member access /Bookmarks(123)/Name

Link traversal /Bookmarks(123)/TagsDeep access /Bookmarks(123)/Tags('abc')/Name

Raw value access /Bookmarks(123)/Names/$value

Sorting /Bookmarks?$orderby=Name

Filtering /Bookmarks?$filter=Created gt '2007-05-07'

Paging /Bookmarks?$top=10&$skip=30

Inline expansion /Bookmarks?$expand=Tags

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Cost Cutting

in VS 2010

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Layoffs.

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Layoffs.

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Layoffs.

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Layoffs.

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Layoffs.

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