Howdy - Mrs. Maus is currently working on a project where the client has given her SGML documents to work with (she's an editor), and wants the final versions to still be SGML, naturally. She's fine working with them in MSWord, but I'm wondering if there's maybe some kind of free/cheap software that'll let her work on them with the tags hidden, or something that is at least somewhat better for SGML.
Any ideas? If Adobe FrameMaker was cheaper I'd be tempted by it. Also, is SGML similar enough to XML that I could simply be looking for an XML tool instead?