On Sat, Apr 6, 2013 at 3:35 AM, C. M. Sperberg-McQueen
<cmsmcq@blackmesatech.com> wrote:
I'm experimenting with the construction of secondary documents which
contain information about my primary documents. I won't go into
details, but it would not be too far off to think of them as user-created
indices -- my goal is to pre-calculate some information I expect to want
often in queries, to see if using such secondary documents produces
faster responses than running the original queries on the original
documents. It would be handy to be able to point from my secondary
documents to specific nodes (in my case, always elements, at least at
the moment) of the primary documents.
The same desire arises when I try to build text search interfaces that
return hits with a small amount of context; I want to be able to provide
links that point to an appropriate ancestor element, so the user can
see more context if desired.
One way to handle this desire would be to take the base URI of the node,
and the path from the root to the element and point to elements using
XPointer element() expressions of the form
collection/docname.xml#element(1/2/4/1/1)
(A function for fast resolution of XPointer element() expressions
would be a nice thing to have, by the way.)
In some XQuery implementations, I believe there are functions
which return some sort of internal identifier for element nodes,
and other functions which take that identifier as an argument and
quickly return that node. (Or perhaps I am just remembering a
facility from the first SGML database I used intensively.) Such functions,
if they exist, seem likely to be faster than resolution of element()
expressions.
Is there anything like that in BaseX?
Thanks!
--
****************************************************************
* C. M. Sperberg-McQueen, Black Mesa Technologies LLC
* http://www.blackmesatech.com
* http://cmsmcq.com/mib
* http://balisage.net
****************************************************************
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