January 2008
Intermediate to advanced
672 pages
14h 51m
English
book
PHP & MySQL® Web Development All-in-One Desk Reference for Dummies®
by Janet Valade, Tricia Ballad, Bill Ballad
Content preview from PHP & MySQL® Web Development All-in-One Desk Reference for Dummies®
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3.2. XML Validation Using Schema
Schema is the W3C standard for validating the structure and validity of XML documents. Creating a schema for your XML allows you to specify the structure of the document as a whole, as well as some data types for individual elements. Listing 3-1 shows a sample XML Schema document.
Example 3.1. A Sample XML Schema Document
<xsd:schema xmlns:xsd="http://www.w3.org/2000/08/XMLSchema">
<xsd:annotation>
<xsd:documentation>
Sample Newsletter schema
</xsd:documentation>
</xsd:annotation>
<xsd:element name="my_newsletter" type="NewsletterType"/>
<xsd:element name="comment" type="xsd:string"/>
<xsd:complexType name="NewsletterType">
<xsd:sequence>
<xsd:element ref="comment" minOccurs="0"/>
<xsd:element name="header" type="HeaderType"/>
<xsd:element name="section1" type="SectionType"/>
<xsd:element name="section2" type="SectionType"/>
</xsd:sequence>
<xsd:attribute name="volume" type="xsd:positiveInteger"/>
<xsd:attribute name="number" type="xsd:positiveInteger"/>
</xsd:complexType>
<xsd:complexType name="HeaderType">
<xsd:sequence>
<xsd:element name="long_title" type="xsd:string"/>
<xsd:element name="filename" type="xsd:string"/>
<xsd:element name="date" type="xsd:date"/>
<xsd:element name="meta_title" type="xsd:string"/>
<xsd:element name="meta_description" type="xsd:string"/>
<xsd:element name="meta_keywords" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="SectionType"> <xsd:sequence> <!-- every section must have a title ... |
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