Dear all, this is a brief question with which I hope to get a clearer picture of the original intention behind the new built-in function fn:put() that has been added to the current XQuery Update Facility draft. In 2.5.1., the draft says: ''[fn:put($node as node(), $uri as xs:string)] stores a document or element to the location specified by an xs:anyURI. This function is normally invoked to create a resource on an external storage system such as a file system or a database.'' What's the intended interpretation of 'external' in the above? At least two interpretations come to mind: (1) The node (and its descendants) are serialized/packaged up/encoded and then submitted to an *external system* ('external' in the sense of, e.g. 'remote, different host on a network'), maybe even via an HTTP PUT command (this is what the name fn:put() could suggest). (2) The node (and its descendants) are serialized/packaged up/encoded in such a way that a system *external to the core query processor* (e.g., an underlying database back-end) can receive it and then store it for later access). In both interpretations it is conceivable that an fn:doc() call using the same URI used during the fn:put() invocation can retrieve the node and its descendants. (Please note that I realize that the interpretation of the URI used in fn:put() is implementation-defined and configurable such that, at the end of the day, I can realize both above interpretations and several more. I am asking for the original intention that led to the proposal of fn:put().) Thanks and cheers, --Torsten -- | Prof. Dr. Torsten Grust grust@in.tum.de | | http://www-db.in.tum.de/~grust/ | | Database Systems - Technische Universität München (Germany) |Received on Tuesday, 8 August 2006 13:46:50 UTC
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