Dublin Core isFormatOf

I am creating an XML doc that references other documents that contain the 
same intellectual content but is presented in a different format. I also 
need to explicitly state what this other format is. I have decided to use 
the dublin core dcterms:isFormatOf format to represent this:

<dcterms:isFormatOf rdf:resource="/path.mpg">
  <dc:format>
    <dcterms:IMT rdf:value="video/mpg" rdfs:label="MPEG video"/>
  </dc:format>
</dcterms:isFormatOf>

Can anyone suggest if this is a standard way to do this or if there is a 
better way.

Thanks
Tom

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