Declaring Elements

In W3C XML Schema terminology, elements and attributes are declared. Both elements and attributes can occur in an instance document.

Listing 19.1 shows a simple example of an XML instance document. Listing 19.2 shows a W3C XML Schema document against which Listing 19.1 can be validated.

Listing 19.1. BasicDocument.xml: A Short XML Instance Document
<?xml version="1.0"?> 
<basicDocument> 
Some text content. 
</basicDocument> 
Listing 19.2. BasicDocument.xsd: A Schema for Listing 19.1
					<?xml version='1.0'?> 
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"> 
<xsd:element name="basicDocument" type="xsd:string" /> 
</xsd:schema> 

The indicative namespace prefix in the W3C XML Schema document is xsd. The namespace declaration ...

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