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Google Wave Data Model and Client-Server Protocol ‎(Google Wa...

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Saved by 3 people (0 private), first by anonymouse user on 2009-05-30


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Stand-off annotations are pointers into the XML document

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Documents form a tree

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independent of the XML document structure

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Stand-off annotations are pointers into the XML document and are independent of the XML document structure. They are used to represent text formatting, spelling suggestions and hyper-links.

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There are currently two types of documents: text documents, used to represent the rich text messages in a wavelet (casually known as blips), and data documents which are typically invisible to the user (for example, tags).

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text documents

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represent the rich text messages in a wavelet (casually known as blips)

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are typically invisible

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data documents

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for example, tags

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The unit of sharing is a wavelet. In the first version of this protocol, all participants on a wavelet have full access to modify the contents and participant list of that wavelet.

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Heterogeneous sharing within a wave is achieved by having differing participant lists on wavelets within the wave. Currently, the two primary uses of this are user-data and private replies.

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the wavelet state to be consistent throughout the system

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The client is responsible for ordering the operations that were received from the server before applying them to its local copy of the wavelet copy.

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according to a version number provided by the server.

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wavelets are grouped into a "wave-view", which is the set of wavelets on a wave visible to a given user.

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A snapshot - the serialized state of the wavelet

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When client-server communications fail, the client and server need to agree on a common state of the wavelet upon reconnecting.

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