## Usage Information

In order to fully validate XML, a schema must be provided. The ValidateXML processor allows the schema to be specified in the property 'Schema File'. The following example illustrates how an XSD schema and XML data work together.

Example XSD specification

            <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://namespace/1" xmlns:tns="http://namespace/1" elementFormDefault="unqualified">
                <xs:element name="bundle" type="tns:BundleType"></xs:element>

                <xs:complexType name="BundleType">
                    <xs:sequence>
                        <xs:element name="node" type="tns:NodeType" maxOccurs="unbounded" minOccurs="0"></xs:element>
                    </xs:sequence>
                </xs:complexType>
                <xs:complexType name="NodeType">
                    <xs:sequence>
                        <xs:element name="subNode" type="tns:SubNodeType" maxOccurs="unbounded" minOccurs="0"></xs:element>
                    </xs:sequence>
                </xs:complexType>
                <xs:complexType name="SubNodeType">
                    <xs:sequence>
                        <xs:element name="value" type="xs:string"></xs:element>
                    </xs:sequence>
                </xs:complexType>
            </xs:schema>

Given the schema defined in the above XSD, the following are valid XML data.

            <ns:bundle xmlns:ns="http://namespace/1">
                <node>
                    <subNode>
                        <value>Hello</value>
                    </subNode>
                    <subNode>
                        <value>World!</value>
                    </subNode>
                </node>
            </ns:bundle>

            <ns:bundle xmlns:ns="http://namespace/1">
                <node>
                    <subNode>
                        <value>Hello World!</value>
                    </subNode>
                </node>
            </ns:bundle>

The following are invalid XML data. The resulting validatexml.invalid.error attribute is shown.

            <ns:bundle xmlns:ns="http://namespace/1">
                <node>Hello World!</node>
            </ns:bundle>

        validatexml.invalid.error: cvc-complex-type.2.3: Element 'node' cannot have character [children], because the type's content type is element-only.

            <ns:bundle xmlns:ns="http://namespace/1">
                <node>
                    <value>Hello World!</value>
                </node>
            </ns:bundle>

        validatexml.invalid.error: cvc-complex-type.2.4.a: Invalid content was found starting with element 'value'. One of '{subNode}' is expected.