[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Well-formed vs. valid
Simon St.Laurent wrote: > > Big question: can I plug someone else's SAX parser into your scanner, and > then have your validation component work on my SAX events? While it's > unlikely that I'd want to plug a different SAX parser in, it's quite > possible that I'd want to work with the SAX events (transforming with XT, > for instance) before performing validation. Well, Sun's current package (released today with source :-) has some infrastructure along those lines ... but it's a bit more integrated with the DOM than with the SAX bits. That's to keep apps from needing to do the sort of tree structure tracking that DOM already does. Since it's in the DOM side, you can plug any SAX parser in to it. Specifically, when DOM nodes are plugged into the tree there are certain clearly defined callbacks which are made: the "XmlReadable" interface. When those callbacks are made, the "parent" context is visible as a DOM tree that doesn't fully correspond to the input document. It seems that one of the more popular methods is doneParse(), called when the last of an element's children is parsed. Also startParse() gets used to do resolution of relative URLs (e.g. in external entities). Those callbacks are intended for performing various application level work such as integrity checks. Applications can provide diagnostics with the same level of specificity (line, file, etc) as the parser itself; in some cases such diagnostics will be reported directly through the SAX error handler used by the parser. - Dave xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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