CouchDB and MongoDB both store documents in JSON format, where JSON is a format originally designed for representing JavaScript objects, but now available in many languages.

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It natively handles JSON, XML, and plain text, and a plug-in architecture allows you to add support for other document types.

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Similarly, MongoDB queries are JSON documents, specifying fields and values to match, and query results can be processed by a built in MapReduce.

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Any document can contain any set of keys, and any key can be associated with an arbitrarily complex value that is itself a JSON document.

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The Activity Streams Project is being implemented in two ways: by extending the Atom Syndication format and by adding a JSON-based format to the Open Social 2.0 standards.

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Each tweet is a JSON file, containing an immense amount of metadata in addition to the contents of the tweet itself: date and time, number of followers, account creation date, geodata, and so on.

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For example, if your business infrastructure requires XML or JSON data formats, or an API to extract office data and transmit it to the field, then make sure you inquire with the mobile App vendor to see what they can offer.

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