Convert sxml to xml, and back

Hi,
I dont know where to post this, so just post in here.

We use translation software here (Trados) to translated documents. Normally this documents are from framemaker, but his application can also take other formats as html, xml, etc.

Now, a new possible client want to know if we can translate a manual that is currently in sxml format (meeting in 1 hour, so did not see the file yet).

I figured Trados does not accept sxml format. But seems that one should be able to convert xml to sxml, and back, if I look at the syntax of it.

Does anyone know if this is possible, and if so , how?

Google did not get me much so far (but then, the internet is really bad here since the darn earthquake in taiwan)