How to perform XML Schema validation with sax\Writer.java provided in the Apache Xerces package?

You can perform XML Schema validation with the sax\Writer.java program provided in the Apache Xerces package as shown below.

Run the sax\Writer.java program with "-v -s" option to turn on XML Schema validation. If the input XML file does not meet the requirements of its Schema, you will see validation errors:

\fyicenter\xerces-2_11_0\samples>\fyicenter\jdk-1.8.0\bin\java 
   -cp .;..\xercesImpl.jar sax.Writer -v -s UserXsdError.xml

<?xml version="1.0" encoding="UTF-8"?>
<fyi:User xsi:schemaLocation="http://fyicenter.com User.xsd">
    <fyi:ID>ONE[Error] UserXsdError.xml:6:25: cvc-datatype-valid.1.2.1: 
  'ONE' is not a valid value for 'integer'.
    [Error] UserXsdError.xml:6:25: cvc-type.3.1.3: The value 
  'ONE' of element 'fyi:ID' is not valid.
</fyi:ID>
    <fyi:Name>Frank Y. Ivy</fyi:Name>
    <fyi:BirthDate>1970-01-01+00:01[Error] UserXsdError.xml:8:52: 
  cvc-datatype-valid.1.2.1: '1970-01-01+00:01' is not a valid value for 'dateTime'.
   [Error] UserXsdError.xml:8:52: cvc-type.3.1.3: The value '1970-01-01+00:01' 
   of element 'fyi:BirthDate' is not valid.
</fyi:BirthDate>
    <fyi:Sex>Male</fyi:Sex>
</fyi:User>

The XML file used in the above test is, UserXsdError.xml:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!-- Copyright (c) 2017 FYIcenter.com -->
<fyi:User xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:fyi="http://fyicenter.com"
  xsi:schemaLocation="http://fyicenter.com User.xsd">
    <fyi:ID>ONE</fyi:ID>
    <fyi:Name>Frank Y. Ivy</fyi:Name>
    <fyi:BirthDate>1970-01-01+00:01</fyi:BirthDate>
    <fyi:Sex>  Male</fyi:Sex>
</fyi:User>

The XML Schema file used in the above test is, User.xsd:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!-- Copyright (c) 2017 FYIcenter.com -->
<xsd:schema
   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
   xmlns:fyi="http://fyicenter.com"
   targetNamespace="http://fyicenter.com"
   elementFormDefault="qualified">

  <xsd:element name="User">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element name="ID" type="xsd:integer"/>
        <xsd:element name="Name" type="xsd:string"/>
        <xsd:element name="BirthDate" type="xsd:dateTime"/>
        <xsd:element name="Sex" type="fyi:sexType"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

  <xsd:simpleType name="sexType">
    <xsd:restriction base="xsd:NMTOKEN">
      <xsd:enumeration value="Male"/>
      <xsd:enumeration value="Femal"/>
    </xsd:restriction>
  </xsd:simpleType>
</xsd:schema>

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