to validate a WSDL is a valid one

do i just need

1) WSDL schema - http://schemas.xmlsoap.org/wsdl/
2) WSDL document

input these 2 document into a XML editor just like validate XML doc with
DTD?

since i never use a XML schema but only DTDs

should i cut and paste XML schema into same file as WSDL ? just like put DTD
into same file as an XML file ?

any tutorial on the web?

Thanks