I have not figured out any way to use a per-stylesheet catalog. 'm not use it's possible, as it appears as though libxslt will use only the global catalog. My particular application is an xslt filter for web servers. Any given web server may host multiple sites and have multiple DocumentRoots. I would like to be able to specify an include or import from a href starting with "http://thissite"; or "me://" or something, and have the filter add a "me://" -> "http://servername/"; rewrite rule, or similar, as needed for each individual site. The web server is threaded. If it were single-process, I could get away with using the global catalog, I think. With threads, one thread may be processing a request for servername A, while another is processing a request for servername B, meaning that if I set a global rewrite rule in the global catalog, it will probably not do the right thing. Using mutexes will kill throughput. I can specify full file:// URLs to the documentroot, but this requires knowing the documentroot for each webserver, and manually changing it in the include/import statements each time a file is relocated. It looks like I can add a local catalog to a document by using a parser context and calling xmlCatalogAddLocal (). This looked promising, other than having to specify a URI (and therefore create and write to disk a catalog file). However, xsltParseStylesheetDoc () takes an xmlDocPtr, not a parser context, and the local catalog(s) aren't used. I can add a working rule to the global catalog with xmlCatalogAdd(), but this does not achieve what I need -- a local mapping of some URI prefix to a different one, such that the webserver's threads won't trample each other. >From what I can see, this will require API additions. I hope someone has a simpler solution. source snippet: ctxt = xmlCreateFileParserCtxt("./main.xsl"); sdoc = ctxt->myDoc; ctxt->catalogs = xmlCatalogAddLocal(ctxt->catalogs,"./catalog.xml"); style = xsltParseStylesheetDoc(sdoc); xmlFreeParserCtxt(ctxt); catalog.xml: <?xml version="1.0"?> <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd";> <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"> <rewriteSystem systemIdStartString = "http://x/"; rewritePrefix = "http://kronk/"/> </catalog> main.xsl: <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0"> <xsl:output method="text"/> <xsl:include href="http://x/test.xsl"/> <xsl:template match="test"> This is 'test': <xsl:apply-templates/> </xsl:template> </xsl:stylesheet> -- Michael Rothwell e: rothwell at holly-springs.nc.us k: http://www.flyingbuttmonkeys.com/rothwell-public-key.txt
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