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   Parsing XML->DOM and XSL querying optimising

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  • From: "Tony McDonald" <tony.mcdonald@ncl.ac.uk>
  • To: "xml-dev" <xml-dev@ic.ac.uk>
  • Date: Fri, 19 Mar 1999 06:35:09 +0000

Hi all,

I have an application that consists of 140+ XML documents, roughly 100k
bytes each that I want to be able to query (using XSL pattern matching at
present) and output to XML/HTML and RTF format. This will happen in real
time (if at all possible).

Additionally, I'd like to be able to search/query the entire repository of
documents and return a composite XML/HTM or RTF document from these.

At the moment, I'm experimenting with the DOM parser in Python and finding
that a DOM parse takes about 4 seconds, whilst an XSL query takes about 1.8

I reckon that a user could wait the 1.8 seconds for a query, but might start
to get fidgety after almost 6 seconds (how transient we are!).

What strategies have people got for limiting the DOM parsing time?

My own thoughts are that I load up all 140 documents at server-startup time,
parse them into DOM[0]...DOM[139], store them into memory and then query
each one in turn in the case of a simple query, and query all the DOM
objects in the case of a full query across all XML documents.

Is this sensible? practical? stupid?

any thoughts on this would be appreciated,

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