RELAX NG

Assembling the Parts

You have seen the different bits and pieces needed to define and reference patterns. It’s time to put them all together and create a complete schema. The first exercise is to define a DTD-like RELAX NG schema that defines each element and its own named pattern.

The full schema might look like this:

<?xml version="1.0" encoding="UTF-8"?> <grammar xmlns="http://relaxng.org/ns/structure/1.0"> <start> <ref name="element-library"/> </start> <define name="element-library"> <element name="library"> <oneOrMore> <ref name="element-book"/> </oneOrMore> </element> </define> <define name="element-book"> <element name="book"> <attribute name="id"/> <attribute name="available"/> <ref name="element-isbn"/> <ref name="element-title"/> <oneOrMore> <ref name="element-author"/> </oneOrMore> <zeroOrMore> <ref name="element-character"/> </zeroOrMore> </element> </define> <define name="element-isbn"> <element name="isbn"> <text/> </element> </define> <define name="element-title"> <element name="title"> <attribute name="xml:lang"/> <text/> </element> </define> <define name="element-author"> <element name="author"> <attribute name="id"/> <ref name="element-name"/> <optional> <ref name="element-born"/> </optional> <optional> <ref name="element-died"/> </optional> </element> </define> <define name="element-name"> <element name="name"> <text/> </element> </define> <define name="element-born"> <element name="born"> <text/> </element> </define> <define name="element-died"> <element name="died"> ...