half-baked parsers vs binary XML
I have been thinking about optimal XML parsing, partly as a result of the binary XML discussion. Right now the world of XML parsers is divided into well-formedness and validating. Another type being discussed is binary. I'd like to propose another, the half-baked parser. This parser is mentioned in the notes for section 5.1 of the annotated XML spec (not in a positive light :-). The half-baked parser can only process XML documents that don't have a prologue. This makes its memory footprint and execution path much smaller and faster respectively. Unfortunately, it isn't a legal XML parser anymore. This can be addressed by having a modular parser architecture that would be optimistic and try the half-baked parser first. If it encountered a prologue, it could load either a WF parsing module or a validating parsing module. I think that a highly tuned half-baked parser in combination with an optional stream-oriented compression scheme would address many of the concerns that something like binary XML is intended to deal with in both the transmission, storage and execution speed dimensions. A great discussion of modular layered parsing can be found on Simon St. Laurent's web site (www.simonstl.com). Gabe Beged-Dov www.jfinity.com 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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