XML_Schema_Notes (1)

XML_Schema_Notes (1) - XML Schema XML Schema Validation...

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Unformatted text preview: XML Schema XML Schema Validation Validating Your Documents To validate your XML Schema documents and instance files you can use the Multi-Schema Validator which we have been using to validate our Relax NG documents and instance files. This, however, is not a very strict validation. A better means of validating your XML Schema documents and instance files is to use Altovas XMLSPY which does a very strict validation. To obtain a 30 day trial copy of XMLSPY, go to: http://www.altova.com/download_spy_home.html DOWN LOAD XML Schema Making the Link The First Step After creating the XML Schema document, you must the begin the instance document as you normally would with the XML processing instruction and appropriate root element: <?xml version=1.0?> <root_element> <!- statements go here --> </root_element> The Second Step After including the XML PI (processing instruction) and root element, you must then specify the XML Schema namespace using the xmlns attribute along with a prefix ( xsi in our case) so you can borrow elements and attributes from that namespace: <?xml version=1.0?> <root_element xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance > <!- statements go here --> </root_element> The Third Step Next you will include the noNamespaceSchemaLocation attribute from the XML Schema namespace along with the prefix that you previously declared ( xsi ) and include the name of the XML Schema document you created: <?xml version=1.0?> <root_element xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance xsi:noNamespaceSchemaLocation=filename.xsd > <!- statements go here --> </root_element> XML Schema Getting Started The First Step When creating a XML Schema document, you must begin the document with the XML processing instruction and specify the version of XML that the document is based on: <?xml version=1.0?> <!- statements go here --> The Second Step After including the XML PI (processing instruction), you must then initiate the XML schema document using the <schema> element. The remainder of the document will be encased inside this element. <?xml version=1.0?> <schema xmlns="http://www.w3.org/2001/XMLSchema"> <!- statements go here --> </schema> The Third Step Including the <schema> element as we have done is fine but in the case of adding additional namespaces to the document, we need to expand the notation and specify the use of the XML Schema namespace so there is no confusion within the document: <?xml version=1.0?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <!- statements go here --> </xsd:schema> XML Schema Defining the Root Element Defining the Root Element Within the <schema> element, the Root Element of the Schema (Grammar) is defined....
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XML_Schema_Notes (1) - XML Schema XML Schema Validation...

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