Hello and my apologies for a question that has surely been asked and answered. I searched the archive but couldn't find my answer, so here is my question: My librarian would like to create a finding aid for her entire library, and this would include content found in other finding aids. A meta-finding aid, if you will. I am just the computer programmer, but it's been left up to me to encode everything and format the xml, so I am bumbling through as best as I can. She'd like to make the container type = 'shelf' I'm unable to find documentation that this is a valid attribute. It isn't disallowed though. What are your thoughts? Thanks!