CSCI E-153
Web Development Using XML
Harvard Extension School 2009
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Schema Features
Document Type Definition (DTD)
History in SGML
Many mature XML applications defined in DTD
Format not intuitive
Limited constructs
Not natively namespace aware
W3C XML Schema
XML format
Data-types
Namespace aware
W3C "way" to define XML applications
RELAX NG (RNG)
XML format and "compact" format
Data-types
Namespace aware
Schematron
rules based, expressed through XPath
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Copyright © 2002-2009 David P. Heitmeyer