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Now, we want the "root" element to contain a list of three integers. We will define a general list (element "list") of integers and then restrict it (element "restriction") to have exact length (element "length") of three items.
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Valid document <root xsi:noNamespaceSchemaLocation="correct_0.xsd" xmlns="" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" >0 0 1</root> Invalid document <root xsi:noNamespaceSchemaLocation="correct_0.xsd" xmlns="" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" >0 0 1 1</root> Invalid document <root xsi:noNamespaceSchemaLocation="correct_0.xsd" xmlns="" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" >0, 0, 1</root> |
Correct XML Schema (correct_0.xsd) <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" > <xsd:element name="root"> <xsd:simpleType> <xsd:restriction base="myList"> <xsd:length value="3"/> </xsd:restriction> </xsd:simpleType> </xsd:element> <xsd:simpleType name="myList"> <xsd:list itemType="xsd:integer"/> </xsd:simpleType> </xsd:schema> |
We will use the "list" type and an "integer" type (the latter borrowed from XML Schema datatypes).
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Valid document <root xmlns="">0 0 1</root> Invalid document <root xmlns="">0 0 1 1</root> Invalid document <root xmlns="">0, 0, 1</root> |
Correct Relax NG schema (correctRelax_0.rng) |