XML Schema Validation Issue

Question

I'm trying to validate an XML file against XSD Schema that I've written before. The java code to validate my xml file is shown below. When I try to validate the XML, I always get an error like : "Cannot find declaration of the root element".

Could you help me to solve this problem?

XML file

<?xml version="1.0" encoding="UTF-8"?>
<AllBooks xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://myNameSpace.com"  
        schemaLocation="http://myNameSpace.com book.xsd">
    <book>
        <id>1</id>
        <title>aşk ve gurur</title>
        <author>james brown</author>
        <category>science</category>
        <availablity>100</availablity>
        <price>5000</price>
    </book>
    <book>
        <id>2</id>
        <title>kskkdn</title>
        <author>mşlfke</author>
        <category>love</category>
        <availablity>50</availablity>
        <price>5000</price>
    </book>
</AllBooks>

Schema file

<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 
        targetNamespace="http://www.w3schools.com" 
        xmlns="http://www.w3schools.com" elementFormDefault="qualified">

    <xs:element name="AllBooks">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="book" maxOccurs="unbounded">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="id" type="xs:integer"/>
                            <xs:element name="title" type="xs:string"/>
                            <xs:element name="author" type="xs:string"/>
                            <xs:element name="category" type="xs:string"/>
                            <xs:element name="availability" type="xs:integer"/>
                            <xs:element name="price" type="xs:integer"/>
                        </xs:sequence>
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:complexType>
    </xs:element>

</xs:schema>

And java code

static boolean validateAgainstXSD(InputStream xml, InputStream xsd)
{
    try
    {
        SchemaFactory factory = 
        SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        Schema schema = factory.newSchema(new StreamSource(xsd));
        Validator validator = schema.newValidator();
        validator.validate(new StreamSource(xml));
        return true;
    }
    catch(Exception ex)
    {
        return false;
    }
}

Answer 1

Your namespaces do not match up between the XSD and XML files. Also, availability is misspelled as availablity in the XML file. Corrections follow...

Use this XSD:

<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 
           targetNamespace="http://myNameSpace.com"
           elementFormDefault="qualified">

  <xs:element name="AllBooks">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="book" maxOccurs="unbounded">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="id" type="xs:integer"/>
              <xs:element name="title" type="xs:string"/>
              <xs:element name="author" type="xs:string"/>
              <xs:element name="category" type="xs:string"/>
              <xs:element name="availability" type="xs:integer"/>
              <xs:element name="price" type="xs:integer"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

Then this fixed XML instance document will be valid:

<?xml version="1.0" encoding="UTF-8"?>
<AllBooks xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns="http://myNameSpace.com"  
             xsi:schemaLocation="http://myNameSpace.com book.xsd">
    <book>
        <id>1</id>
        <title>aşk ve gurur</title>
        <author>james brown</author>
        <category>science</category>
        <availability>100</availability>
        <price>5000</price>
      </book>
    <book>
        <id>2</id>
        <title>kskkdn</title>
        <author>mşlfke</author>
        <category>love</category>
        <availability>50</availability>
        <price>5000</price>
    </book>
</AllBooks>