Quoting John Attig <jx...@psu.edu>:
On 11/9/2011 2:43 PM, Karen Coyle wrote:
If we truly move into an entity-relationship model for our data, . . .
You could equally have same "if we truly move into a linked-data
model for our data". My understanding is that an indispensable
piece of any linked data specification is the predicate -- which is
the relationship designator turned into a verb.
Yes, I think that for this discussion this is true. There are
differences, like: E-R doesn't require the use of identifiers, but LD
does. FRBR defines an E-R model, which is kind of a precursor to
linked data, and at this date, linked data is the direction folks are
going in.
On the other hand, you don't have to use the most specific
relationship designator available. I suspect that many will be
satisfied with "creator" and "contributor" and avoid being more
specific. Because there are well-defined hierarchies, this
difference in granularity shouldn't be an obstacle to
interoperability.
I agree. The RDA definition of "contributor" is:
"A person, family, or corporate body contributing to the realization
of a work through an expression. Contributors include editors,
translators, arrangers of music, performers, etc. " (from the
registry, not the toolkit text)
So use of this term depends entirely on its acceptance as part of the
RDA standard, and the development of "best practices" as we go forward.
There are many levels of granularity, such as:
1. Contributor
1.1 Composer (Expression)
1.11 Composer of Music for Silent Film (Expression)
1.11 Composer of Music for Sound Film (Expression)
I don't know if RDA gives any advice about moving up and down the
granularity tree when assigning roles, but presumably few data
producers are expected to provide the lowest level of detail.
Note that in the registry[1] the hierarchy of roles is coded although
it isn't easily visible (we need a good visualization, to say the
least) but every Composer (Expression) is a Contributor, and by
inference so are the ones marked 1.11, so it should be correct to use
"Contributor" for all of these. Communities should be able to provide
the level of granularity that they find useful, and others can treat
the data with less (but not more) granularity if they so wish.
kc
[1] http://metadataregistry.org/schemaprop/list/schema_id/4.html
John
--
Karen Coyle
kco...@kcoyle.net http://kcoyle.net
ph: 1-510-540-7596
m: 1-510-435-8234
skype: kcoylenet
