XML Concepts (2)

XML Schemas

• Allow constraints to be applied on XML attributes
• Express shared vocabularies and allow machines to carry out rules made by people
• Richer than DTDs
• See <http://www.w3.org/XML/Schema>

XSLT

• A language for transforming XML from one DTD to another, or to another format (e.g. PDF)
• Written in XML
• Knows about XML (e.g. tree structures, etc.)
• See <http://www.xslt.com/>

Data Formats