Web Development
Web Developer Guidelines
Visual Design Recommendations

Checkpoint 2.8 - XML/XSLT

Content is chunked into reasonable sizes and logical structures

XML Accessibility Guidelines

Guideline 2: Create semantically-rich languages

Chunking of information based on element structures gives logic to resulting documents that allow both CSS and XSLT to style content for presentation in alternate formats and allows the structures to be aggregated and quickly navigated by assistive technologies.

Requirement

Create the schema or DTD to allow content to be chunked into reasonable size and structured using a logical hierarchy of elements

Techniques

In this XML Schema example, a document is broken up into a number of sections, and a sequence of nest-able sections with a consistent structure may be used for both navigation and the automated generation of a table of contents to whatever level. 


<xsd:schema xmlns="http://www.motoring.org"
   xmlns:xsd="http://www.w3.org/2000/10/XMLSchema">
   <xsd:element name="automobile">
      <xsd:complexType>
         <xsd:sequence>
            <xsd:element ref="engine"/>
            <xsd:element ref="chassis"/>
         </xsd:sequence>
      </xsd:complexType>
    </xsd:element>
    <xsd:element name="engine" type="xsd:string">
     <xsd:annotation>
       <xsd:documentation>Engine Specs</xsd:documentation>
     </xsd:annotation>
    </xsd:element>
    <xsd:element name="chassis">
      <xsd:complexType>
         <xsd:sequence>
            <xsd:element ref="frame"/>
            <xsd:element ref="components"/>
            <xsd:element ref="wheels" maxOccurs="4"/>
         </xsd:sequence>
      </xsd:complexType>
  </xsd:element>
  <xsd:element name="wheels" type="xsd:string"/>
</xsd:schema>

Information Source

The original source of this information is located on the W3C web site  (www.w3.org/TR/xag#cp2_5)

 

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