Active document; AXML
Active XML documents (AXML documents, for short) are XML documents  that may include embedded calls to Web services . Hence, AXML documents are a combination of regular “extensional” XML data with data that is defined “Intentionally,” i.e., as a description that enables obtaining data dynamically (by calling the corresponding service).
AXML documents evolve in time when calls to their embedded services are triggered. The calls may bring data once (when invoked) or continually (e.g., if the called service is a continuous one, such as a subscription to an RSS feed). They may even update existing parts of the document (e.g., by refreshing previously fetched data).
The AXML language was originally proposed at INRIA around 2002. Work around AXML has been going there in the following years. A survey of the research on AXML is given in . The software, primarily under the form of an AXML system, is available as open...
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