They[0] should be saving the documents in a free format, despite the closed source software. Office supports .odf files or some other free format, does it not?

They[0] should be saving the documents in a free format, despite the closed source software. Office supports .odf files or some other free format, does it not? [0] By "they" I mean the persons who created the documents, not the ones who try to edit them using Gnu/Linux...