
This article is out of date and is provided for those still using older schemas. For information regarding the current XSD Schemas go here.
XML provides a syntactical foundation for creating labeled document structures in all kinds of styles and flavors. XML 1.0 came with a set of tools for describing those structures, Document Type Definitions (DTDs), but that set of tools both used its own syntax and didn't address the needs of data-centric fields into which XML quickly advanced. A new proposal, for XML Schemas, promises to use XML syntax, more precise data typing, and a mostly-object-oriented approach to describing structured types...
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