repository/conf/sample/synapse_sample_7.xml

<?xml version="1.0" encoding="UTF-8"?>
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  ~  KIND, either express or implied.  See the License for the
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<!-- Introduction to local Registry entries and using Schema validation -->
<definitions xmlns="http://ws.apache.org/ns/synapse"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://ws.apache.org/ns/synapse http://synapse.apache.org/ns/2010/04/configuration/synapse_config.xsd">

    <sequence name="main">
        <in>
            <validate>
                <schema key="validate_schema"/>
                <on-fail>
                    <!-- if the request does not validate againt schema throw a fault -->
                    <makefault response="true">
                        <code xmlns:tns="http://www.w3.org/2003/05/soap-envelope" value="tns:Receiver"/>
                        <reason value="Invalid custom quote request"/>
                    </makefault>
                </on-fail>
            </validate>
        </in>
        <send/>
    </sequence>

    <localEntry key="validate_schema">
        <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
                   xmlns="http://services.samples" elementFormDefault="qualified"
                   attributeFormDefault="unqualified" targetNamespace="http://services.samples">
            <xs:element name="getQuote">
                <xs:complexType>
                    <xs:sequence>
                        <xs:element name="request">
                            <xs:complexType>
                                <xs:sequence>
                                    <xs:element name="stocksymbol" type="xs:string"/>
                                </xs:sequence>
                            </xs:complexType>
                        </xs:element>
                    </xs:sequence>
                </xs:complexType>
            </xs:element>
        </xs:schema>
    </localEntry>

</definitions>