XML Schema and Structure

• DTD

  • Original schema representation, defines structural rules for a class of XML documents.

• XML Schema http://www.w3.org/XML/Schema

  • Also sets out standardized structure for class of XML documents. Is coded in XML, can be parsed and edited with standard software. Two separate parts: structures and datatypes.

• Namespaces http://www.w3.org/TR/REC-xml-names/

  • Allows developers to qualify element and attribute names with unique URIs, avoids recognition errors.

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