...but that depends on the structure of the XML file. By its very nature, XML files are customised, which is why it's impossible to give you a general answer.
does anybody know if it possible to import a xml file (glossary) to Trados 7?
Can you be more precise? Would you like to import it into MultiTerm?
Would it be possible to convert it to a txt format?
Possibly - after all, XML files are text files (just open the file in a text editor). The question is what text format you need...