[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Document function -- document may not exist
At 2002-07-03 15:44 -0500, mjyoungblut@xxxxxxx wrote:
I was wondering if there is a way of getting around the exception that is thrown by most parsers if the document function is called for a file that does not exist. I would just like to continue on in the processing. For example, I would like to do something like the following: Is the above not working for you? When the document() function cannot find the document the recovery is to return an empty node-set. Since you are using the result in the <xsl:for-each>, if the result is empty then nothing happens. It seems to me what you have above should work just fine. I use this for the REST-based aggregation on my web site of the dates of the public courses of those licensees of mine who license our material for public deliveries: (1) - if I get a non-empty node set for the URL my licensee gives me, I synthesize a local backup copy of the document by using the processor extension to write out a node tree as XML (2) - if I get an empty node set for the URL my licensee gives me, I pass the local backup copy of the document to the document() function so at least I have the latest information that was available from my licensee the last time it was successful This means that whenever I build my schedule page listing all of my licensees, I can build all of the information from the most recent successful non-empty return value from the document() function, even if at that point in time there is some reason I cannot reach the private web page on my licensee's site. This model has made the aggregation of information from multiple sources using XSLT really straightforward and resilient. I hope this helps. .............. Ken
G. Ken Holman mailto:gkholman@xxxxxxxxxxxxxxxxxxxx Crane Softwrights Ltd. http://www.CraneSoftwrights.com/s/ Box 266, Kars, Ontario CANADA K0A-2E0 +1(613)489-0999 (Fax:-0995) ISBN 0-13-065196-6 Definitive XSLT and XPath ISBN 1-894049-08-X Practical Transformation Using XSLT and XPath ISBN 1-894049-07-1 Practical Formatting Using XSLFO XSL/XML/DSSSL/SGML/OmniMark services, books (electronic, printed), articles, training (instructor-live,Internet-live,web/CD,licensed) Next public training: 2002-08-05,26,27,09-30,10-03 XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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