XSD Basic Help Needed -- Namespaces in Schemas?

I've got something like the following XML file.

<credits>
    <property name="tag">
        <item>v0003</item>
    </property>
    <property
        name="tag">
        <item>mhma03h</item>
    </property>
</credits>

First requirement is that this XML cannot change no matter what. Please don't suggest doing that below.

I need to write a schema that validates this. And Java code that does the validation.

I am completely stuck and I have no idea really what is going on.

What's a schema like this look like? I've gotten one but it's so bad I'm not going to bother posting. :P I don't want to have to append a namespace to the XML elements. They're set in stone.^_^

How do I just make it so all of these elements are just "found" by the parser? Can I just tell it ignore all this namespace nonsense. With this application of validating against a schema, namespace conflicts are simply impossible.

I've tried putting

<xsd:schema xmlns:xsd="http://w开发者_运维问答ww.w3.org/2001/XMLSchema" xmlns="books" elementFormDefault="unqualified">

for my namespace info and

UPDATE: I've updated what I'm doing to reflect the answers given so far! :)

XSD

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="property">
    <xs:complexType>
        <xs:sequence>
            <xs:element ref="item"/>
        </xs:sequence>
        <xs:attribute name="name" use="required">
            <xs:simpleType>
                <xs:restriction base="xs:string">
                    <xs:enumeration value="tag"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:attribute>
    </xs:complexType>
  </xs:element>
  <xs:element name="item">
    <xs:simpleType>
        <xs:restriction base="xs:string">
            <xs:enumeration value="mhma03h"/>
            <xs:enumeration value="v0003"/>
        </xs:restriction>
    </xs:simpleType>
  </xs:element>
  <xs:element name="credits">
    <xs:complexType>
        <xs:sequence>
            <xs:element ref="property" maxOccurs="unbounded"/>
        </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

XML v0003

Code to load and validate yes. Before you ask, the files are able to be loaded. I've checked like 20 times. :P

SAXParserFactory factory = SAXParserFactory.newInstance();

        SchemaFactory schemaFactory = 
            SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema");

        factory.setSchema(schemaFactory.newSchema(
            new Source[] {new StreamSource("small.xsd")}));


        javax.xml.parsers.SAXParser parser = factory.newSAXParser();

        org.xml.sax.XMLReader reader = parser.getXMLReader();
        reader.setFeature("http://xml.org/sax/features/validation", true);
        reader.setFeature("http://apache.org/xml/features/validation/schema", true);
 reader.parse(new InputSource("small.xml"));

Here is a schema that corresponds to the XML file you posted:

<?xml version="1.0" encoding="UTF-8"?>
<!--W3C Schema generated by XMLSpy v2011 sp1 (http://www.altova.com)-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="property">
    <xs:complexType>
        <xs:sequence>
            <xs:element ref="item"/>
        </xs:sequence>
        <xs:attribute name="name" use="required">
            <xs:simpleType>
                <xs:restriction base="xs:string">
                    <xs:enumeration value="tag"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:attribute>
    </xs:complexType>
  </xs:element>
  <xs:element name="item">
    <xs:simpleType>
        <xs:restriction base="xs:string">
            <xs:enumeration value="mhma03h"/>
            <xs:enumeration value="v0003"/>
        </xs:restriction>
    </xs:simpleType>
  </xs:element>
  <xs:element name="credits">
    <xs:complexType>
        <xs:sequence>
            <xs:element ref="property" maxOccurs="unbounded"/>
        </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

This may not correctly capture the requirements for each element and attribute (check that the min/max occurs, required/optional proprerties, etc... are set correctly) but it should get you started on working with an XML schema that will validate correctly. The schema does not define a target namespace so you won't have to worry about modifying the existing XML to add in namespace prefixes to your existing elements.

You need to find a way to tell the XML processor to use your namespace as the default when it is processing a document without an explicit namespace. Most processors have a way to do this, IIRC there is a method named setNoNamespaceSchema or something similar. You would write an XML schema with a namespace and tell the processor (validator, whatever) to use your namespace for documents that do not have an explicit namespace.