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Expat

Expat

Expat is a stream-oriented XML 1.0 parser library, written in C. Expat was one of the first open source XML parsers and has been incorporated into many open source projects, including the Apache HTTP Server, Mozilla, Perl, Python and PHP.

James Clark released version 1.0 in 1998 while serving as technical lead on the XML Working Group at the World Wide Web Consortium. Clark released two more versions, 1.1 and 1.2, before turning the project over to a group led by Clark Cooper, Fred Drake and Paul Prescod in 2000. The new group released version 1.95.0 in September 2000 and continues to release new versions to incorporate bug fixes and enhancements. Expat is hosted as a SourceForge project. Versions are available for most major operating systems.

To use the Expat library, programs first register handler functions with Expat. When Expat parses an XML document, it calls the registered handlers as it finds relevant tokens in the input stream. These tokens and their associated handler calls are called events. Typically, programs register handler functions for XML element start or stop events and character events. Expat provides facilities for more sophisticated event handling such as XML Namespace declarations, processing instructions and DTD events.

Expat's parsing events are similar to the events defined in the Simple API for XML (SAX), but Expat is not a SAX-compliant parser. Projects incorporating the Expat library often build SAX and DOM parsers on top of Expat.

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MS 진영의 XML 파서는 MSXML SDK 가 가장 많이 쓰이겠지만, 리눅스 계열 혹은 OpenSource 진영에서의 XML 파서는 Expat 이 일통한 듯 보임.
파이선의 기본 XML 파서로 채택되어 이용되고 있다. 정직 형님의 강력 추천에도 불구 MS 계열의 개발자는 좀 꺼리는 듯 하다. ㅡ.ㅡ;; (사람은 익숙해지면 못버린다. ㅋㅋ)
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