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Subject: Possible Catalog Issues for DocBook 4/5: Missing 'www' in System Identifier?
Hi, not sure if this can be considered as a "bug", but I've stumpled over an entry in the catalog files, both for DocBook 4 and 5. Maybe someone can clarify it. For a long time, the DocBook schema has got two official _system_(!) identifiers: the one from OASIS and the docbook.org domain. That's the reason why you can find in the DocBook 4.5 catalog file[1] two entries to access the DocBook 4.5 DTD: <system systemId="http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" uri="docbookx.dtd"/> <system systemId="http://docbook.org/xml/4.5/docbookx.dtd" uri="docbookx.dtd"/> Well, I had always the (wrong?) impression, that the system identifier for the docbook.org domain contains a "www". Using a Web browser to access the URL is usually not a problem (as both URLs work, with and without "www"). However, an XML catalog resolver wants the *exact* string. If someone tries to use such a system identifier, he will get into problems. For example, oXygen 15 creates a DocBook file which contains the "www". However, they also use the above catalog file. I guess, this problem hasn't occured yet as all the XML tools try to find the public identifier first. Assuming there is a correct entry in the XML catalog, the system identifier never gets resolved (and doesn't need to). Is this ambiguous? I would say yes. Or at least confusing. What would the experts recommend here? Thanks! ---- Reference [1] http://www.docbook.org/xml/4.5/catalog.xml -- Gruß/Regards, Thomas Schraitle
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