Loading schema...
'schema.xsd' => Loading 'schema.xsd' from disk
'included.xsd' => Loading 'included.xsd' from disk
'http://www.w3.org/2002/08/xhtml/xhtml1-transitional.xsd' => Fetching...
'http://www.w3.org/2001/xml.xsd' => Fetching...
Validating XML #1...
=> Valid!
Validating XML #2...
=> Invalid! unknown-137e570:0: Schemas validity error : Element '{http://www.example.com}world': The attribute 'foo' is required but missing.
Validating XML #3...
=> Invalid! unknown-137e570:0: Schemas validity error : Element '{http://www.w3.org/1999/xhtml}foo': This element is not expected. Expected is one of ( {http://www.w3.org/1999/xhtml}a, {http://www.w3.org/1999/xhtml}br, {http://www.w3.org/1999/xhtml}span, {http://www.w3.org/1999/xhtml}bdo, {http://www.w3.org/1999/xhtml}object, {http://www.w3.org/1999/xhtml}applet, {http://www.w3.org/1999/xhtml}img, {http://www.w3.org/1999/xhtml}map, {http://www.w3.org/1999/xhtml}iframe, {http://www.w3.org/1999/xhtml}tt ).