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Subject: Re: SAX 2.0 enhancement proposal
James Clark wrote: To: Rob Lugt <roblugt@elcel.com>; <xml-dev@lists.xml.org> Cc: <entity-resolution-comment@lists.oasis-open.org> Sent: 14 June 2001 06:18 Subject: Re: SAX 2.0 enhancement proposal > > In my view, an improved EntityResolver interface (perhaps for SAX 3.0) > would > > be : > > > > interface EntityResolver > > { > > public InputSource resolveEntity( > > java.lang.String name, > > java.lang.String publicId, > > java.lang.String systemId, > > java.lang.String baseUri) > > throws SAXException, java.io.IOException; > > } <snip/> > > I think it's generally a good idea for XML parsers to pass applications both > the system id and the base URI: it provides a little bit more flexibility. > The interfaces to both expat and XP do this. > > If you change this, you also need to change DTDHandler to pass a baseURI and > the system ID. This would align better with the infoset > > http://www.w3.org/TR/xml-infoset/#infoitem.entity.unparsed > Yes, I agree the proposal should be extended to include the methods on DTDHandler for consistency. > > I propose a simple extension to SAX 2.0 in > > the guise of a new standard feature: > > http://xml.org/sax/features/absolutize-system-identifiers. The default > > value could be "true" to maintain compatibility with existing systems. > > Applications could set it to "false" when they want a conforming catalog > > processor. > > You need both the base URI and the unabsolutized system ID. I would use a > hack like having the systemId arg contain both the base URI and the system > ID separated by some character that is not allowed in XML (such as '\0'). > You are right. When I penned this proposal the XML Catalog draft spec had no need for the baseURI but I think the next draft will do. Your suggestion works for me. This is probably easier that other alternatives, such as creating a SAX property to hold the current baseURI. Thanks for your input. Regards Rob Lugt ElCel Technology
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