The XSD file describes the XML-format that the MDR understand. You can create catalogs using this XML format and upload them on the MDR.
Here is a small example catalog:
<?xml version="1.0" encoding="UTF-8"?> <catalog> <definitions> <definition language="en"> <designation>Example catalog</designation> <text>A simple example catalog</text> </definition> </definitions> <code code="m" isValid="true"> <definitions> <definition language="en"> <designation>male</designation> <text>Specifies the gender as male.</text> </definition> </definitions> </code> <code code="f" isValid="true"> <definitions> <definition language="en"> <designation>female</designation> <text>Specifies the gender as female.</text> </definition> </definitions> </code> <code code="u" isValid="true"> <definitions> <definition language="en"> <designation>unknown</designation> <text>Specifies the gender as unknown.</text> </definition> </definitions> </code> </catalog>