Quoting Jonathan Rochkind <[email protected]>:

I think the nature of the problem you identify in your examples is not really with 'manifestation' as an entity, but with the lack of fleshing out of how to model "aggregations" in FRBR, a somewhat tricky problem.


I was informed off-list that what I described as a "Manifestation" with additional bits, like indices or bibliographies, would be considered an Expression in FRBR. Here's what FRBR says:

"The boundaries of the entity expression are defined, however, so as to exclude aspects of physical form, such as typeface and page layout, that are not integral to the intellectual or artistic realization of the work as such. When an expression is accompanied by augmentations, such as illustrations, notes, glosses, etc. that are not integral to the intellectual or artistic realization of the work, such augmentations are considered to be separate expressions of their own separate work(s)."

This then seems to me that there will be many expressions that each have only one manifestation.

But since I'm still trying to wrap my head around this, I went to the RDA registry and pulled off the data elements listed there, and divided into W E M I plus Group2 and Group 3. You can see these raw lists of elements linked at:
  http://kcoyle.net/rda/

It helps me understand just what goes into a WorK, Expression, etc. to see the list of data elements (since I guess that's how I think about things).

Note that there were three elements I wasn't sure of and I'm checking on those, plus there could easily have been flaws in my methodology, so if anyone sees problems in these lists please let me know.

This doesn't address the aggregate question that Jonathan speaks to here. I suspect that by some logic, aggregates are expressions... ? True?

kc

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Karen Coyle
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