John,
I guess I did not read the Final Report that carefully, since I'm not
sure what the difference is between aggregating expressions/works and
aggregate expressions/works.
I'm not surprised. We had a long and difficult time on this list working
out the difference. Have a look at these posts (all rather longish, I'm
afraid):
http://www.mail-archive.com/rda-l@listserv.lac-bac.gc.ca/msg06461.html
http://www.mail-archive.com/rda-l@listserv.lac-bac.gc.ca/msg06491.html
http://www.mail-archive.com/rda-l@listserv.lac-bac.gc.ca/msg06494.html
http://www.mail-archive.com/rda-l@listserv.lac-bac.gc.ca/msg06501.html
What we do in Virtua is allow you to have a Manifestation, which
contains separate Works, linked to multiple Expressions/Works,
including an Expression/Work for the Manifestation (an aggregate). I
think Figure 3 in the Final Report illustrates the process very well.
If I understand you correctly, you have implemented the left-hand side
of figure 3 (which is rather straightforward), and you have also
implemented entities for what is shown on the right-hand side. Now the
question remains what sort of information is stored there. If, for
example, you have a selected works edition and you store the title of
this edition (something like "Selected works of ...") in the record for
the work entity, then I'd say it looks rather like an aggregate work and
not an aggregating work. That's why I'd be interested in some more
details, e.g. an example record.
You can see a powerpoint presentation on our RDA/FRBR implementation at
http://www.vtls.com/products/virtua
and click on the hyperlink at the bottom of the page:
Insights and Processes from VTLS's 8 Years of Experience with FRBR and
RDA
<http://www.vtls.com/sites/vtls.com/files/products/media/RDA2010Julweb.pdf>
It is a couple of years old now, but it still illustrates the system okay,
It gives a very good idea of the way Virtua handles FRBR for ordinary
works, but unfortunately there is no example for an aggregate manifestation.
Heidrun
--
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Prof. Heidrun Wiesenmueller M.A.
Stuttgart Media University
Faculty of Information and Communication
Wolframstrasse 32, 70191 Stuttgart, Germany
www.hdm-stuttgart.de/bi
