I've been trying figure out archival documents, and may have stumbled
on something:

I've been thinking of archival docs as items that have a relatedItem
"host" that is a collection.

I don't think this is right, however, and my hint at this came in
reading through the NISO Z39.29-200X spec, which has three levels:

        analytic
        monographic
        collective

I really dislike this model in general (the analytic/monographic
thing), but I do like collective, which is rather more general and
structural than series.

This brings me to my point: shouldn't relatedItem "series" really be
something like "collective"?

In that case, a manuscript in a collection and a book in a series both
share the same relatedItem structure? It never did make much sense to
me that collection is coded in an attribute value on typeOfResource.

Even if I'm wrong, I'd like some clarification so I can understand this
better.

Bruce