Filter XML with XSD

[Guru.RoT]

I've got an XML and its XSD file. So, the XSD says which are the required fields of the XML and I need to extract just them - basically a new XML with only the required fields (frankly, I need the nodes which have \[code\]minOccurs='1'\[/code\] in the XSD). I am aware that I need XSLT for this but is there any way/application to generate an XSLT which will only extract the nodes that have \[code\]minOccurs='1'\[/code\] in the XSD file.