XML TutorialLesson 19Free preview

XML Schema

This lesson is part of XML · All levels

Summary

XML Schema (XSD) is a richer DTD substitute because it is written in XML format and supports data types such as integers, dates, and booleans. In addition to the structure, the Schema can set the range of values, maximum length, and number of appearances of the elements. Because of this capability, XSD became the standard of choice for describing modern XML data contracts.

Key points

XML Schema uses the .xsd extension and is written in XML format
XSD supports primitive data types such as xs:integer and xs:date
XSD sets the order, number, and mandatory absence of elements
The main components are xs:element, xs:attribute, and xs:sequence
XSD is more rigorous and descriptive than DTD

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