I started to answer your question Suzanne, but then got confused and
thought I'd let someone else answer.  Since that didn't happen I'll
send this anyway...



> So, how do we stand on being able to pull out the data needed?
> If we use my poor beatles... whoopse I mean beetles.

Schematically, and following from the note yesterday, why not:

Record 1                Project as a whole (BCA)
        Record 2                Collection as a whole (the beetle stuff; in turn linked to 1)
                Records 3-6     Each separate volume (each linked to 2)
                        Records 7-???           Each separate part (each linked to their respective

Your example is tricky, because it is not a citation in the traditional
sense, which AFAIK always refer to a specific object rather than
everything in a collection.  If I have an edited book with individual
chapters, I would never cite the book and include each separate chapter
title in a single reference.  Instead I would have a series of entries
that each point to the main record.

But maybe your example here could be conceptualized in the same way as
a series of citations that look like one?

> _Insecta. Coleopter_. v. 4  _Rhynchophora_.  pt. 4_Curculionidae
> Curculionoidea._ G. C. Champion. (vii, 750 p., 35 plates) 1902-1906.
> (Volume
> 12 of the _Biologia Centrali-Americana_ F. D. Ducane and O. Salvin,
> 1879-1915) Smithsonian Institution Libraries, 2003.

*IF* I understand right, you are basically wanting a citation for the
collection as a whole, and then within that to insert the citationInfo
and record title of two additional records: one for volume 4, and
another for part 4 of volume 4.

In my edited book chapter example, I'd typically have:

Doe, J. (1973) "A Chapter Title," in The Book Title, pp34-52.

If I cited another chapter from the same book, it'd be a separate entry

Doe, J. (1973) "Another Chapter Title," in The Book Title, pp53-64.

So can we say the analog to your situation would thus be the following?

Doe, J. (1973) "A Chapter Title" (pp34-52), "Another Chapter Title"
(pp53-65) in The Book Title.

While this makes sense to me, I'm not sure how you'd write an XSLT file
to pull this all together properly (I bet it can be done; I just don't
have those kinds of skills).

I wonder if another analog is different expressions (in the language of
the FRBR, which I'm only just learning about) of the same work.  Can
MODS account for this with its related item element?  Could one have a
record for a Beethoven Symphony as an intellectual work, and then link
to different expressions (performances/recordings) records?