I noticed somewhat of a hole in XQuery ... hoping I am wrong.
I can find no way to set the base URI of a constructed document e.g
document { <root/> }
such that fn:document-uri() would return it.
It seem this is one of those properties that must come from the outside
environment.
I know if I were to store the document to a file then re-read it, likely the
XML processor would pick it up ... I also know how to do this programmatically
in API's like say Saxon.
But it seems missing from XQuery itself. My guess is that since XQuery doesnt
support storing documents it was thought unimportant to set the document URI.
Why I ask ?
I'm still looking at Streaming XDM formats, including pure in-memory streaming.
But it seems like I cannot directly encode and pass on a document (or base) URI
through XQuery by itself to the output. So any constructed documents would
have none or undefined URI's to the receiver. this leads me to think I need a
meta encoding for XDM much like proposed at Balisage (XDML). basically
passing the URI information as seperate XDM values and a convention for
interpreting them. This seems like it could not be done in pure XQuery however
because the target even if it got say a sequence ( "uri" , document ) has no
way to apply the uri to the document using XQuery so it must be done by
external code.
Thanks for any commentary.
-David
----------------------------------------
David A. Lee
[email protected]<mailto:[email protected]>
http://www.xmlsh.org
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