I have the XML:
<?xml version="1.0" encoding="utf-8"?>
<song id="id1" 
          xmlns="urn:Test:Song:1.0" 
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
          xsi:schemaLocation="urn:Test:Song:1.0 song.xsd">
  <name>name1</name>
</song>
It fails to validate against the XSD:
<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns="urn:Test:Song:1.0" 
               targetNamespace="urn:Test:Song:1.0" 
               xmlns:xs="http://www.w3.org/2001/XMLSchema" >
  <xs:element name="song">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="name" type="xs:string" minOccurs="0" />
    </xs:sequence>
    <xs:attribute name="id" type="xs:string" />
  </xs:complexType>
  </xs:element>
</xs:schema>
in Eclipse and Visual Studio. In Eclipse the error is: cvc-complex-type.2.4.a: Invalid content was found starting with element 'name'. One of '{name}' is expected.
Validation succeeds for the XML:
<?xml version="1.0" encoding="utf-8"?>
<song id="id1" 
          xmlns="urn:Test:Song:1.0" 
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
          xsi:schemaLocation="urn:Test:Song:1.0 song.xsd">
  <name xmlns="">name1</name>
</song>
The only difference is xmlns="" on the name element. Is there a way to make validation succeed on the first without the use of "no namespace"? What exactly is causing the first XML to fail?