Extract XML from a Word document/Create XSD

Hi, I have a structured Word document that I want to convert to XML files to be used in a document management system workflow.
I have an XSD, but that is for an older version of the document. Could anyone advise on how I can extract the XML files? Also, possibly a new XSD needs to be written to match with the current Word doc, could you tell me how to go about this too? Thanks in anticipation!