XML vs. SGML
SGML-Lite: ignores parts of SGML that no one uses
Focus on delivery of Web data/documents, not print
Goal of customized data retrieval from information databases via semantic tagging, rather than presentation of documents
XML allows for strict or less strict levels of conformance
- 'validity' (with DTD) vs. 'well-formedness’ (no DTD)
XML describes structured data, with no implied formatting; XML documents, like SGML documents, lend themselves to database publishing models