(PHP 5 >= 5.2.0)
XMLReader::setSchema — Validate document against XSD
Use W3C XSD schema to validate the document as it is processed. Activation is only possible before the first Read().
The filename of the XSD schema.
TRUE on success or
FALSE on failure.
E_WARNING if libxml was built without schema
support, the schema contains errors or if
XMLReader::read() has already been called.
This function is only available when PHP is compiled against libxml 20620 or later.