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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Fast text output from SAX?
 > You're mixing apples and oranges. Schema validation (even DTD > validation) is explicitly optional in XML. Furthermore you can > process an invalid document. That is definitely not true of a > malformed document. Failing to check well-formedness is not an option. Agreed, well-formednes must be checked. But surely it doesn't need to be checked every time a document is parsed (if it is unchanged). I think there is definitely room for a parser that can emit SAX events (or something) without bogging down in Wellformedness checks. For example, if a document is received from a partner, wellformedness is checked, and then pushed into a database text field for later processing, there is no need to recheck wellformedness. In fact, when it is parsed again later, there is no need to do a lot of things-- like check end tags-- if wellformedness is known a priori the start tag can be pushed onto a stack, and popped when </ is read. Then the "parser" can simply skip the length of the end tag. There are lots of savings like this-- duplicate attribute checking for example can be costly-- but would be unnecessary if wfness was assumed. All the best, Jeff Rafter 
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