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Dear Stuart,

About your first point: For whatever it is worth, the Ngā Ūpoko Tukutuku is part of the list of subject heading "sources:" http://www.loc.gov/standards/sourcelist/subject.html

And that list, like the list of classification sources, would similarly be a candidate for inclusion in ID.LOC.GOV, for the same reasons.

To your second point, if added to ID.LOC.GOV, the entries of each source list would be converted to RDF and published as linked data.  The code would be noted, of course, but the URI should be used to refer to the concept.

Yours,
Kevin


> -----Original Message-----
> From: Bibliographic Framework Transition Initiative Forum
> [mailto:[log in to unmask]] On Behalf Of Stuart Yeates
> Sent: Tuesday, July 22, 2014 9:59 PM
> To: [log in to unmask]
> Subject: Re: [BIBFRAME] Deproliferation of Predicates
> 
> I have a healthy distrust of such lists, for two reasons.
> 
> Firstly they never seem to include local things I care about, such as
> http://mshupoko.natlib.govt.nz/mshupoko/index.htm (Interestingly,
> subject headings like that become much more interesting in the linked data
> world, but that's another story.)
> 
> Secondly because in a linked data world, abbreviated codes that stand for
> something we will already have URIs for is a redundant source of confusion.
> By all means use the abbreviated codes for human-readable mnemonics, but
> use the full URI for data matching and semantics and make it clear that it's
> the URI not the abbreviated code that carries meaning.
> 
> cheers
> stuart
> 
> On 07/23/2014 09:53 AM, Ford, Kevin wrote:
> > I just wanted to chime in two things here:
> >
> > 1) I want to acknowledge my agreement with the below but also add that
> > this is one of those areas that I believe requires a greater education
> > effort (on all of our parts).  We need to communicate how other
> > communities/implementers can do this responsibly; and
> > 2) A hybrid solution is not only possible but a reality if you consider
> contemporary MARC practice.
> >
> > More about two: We already maintain a healthy list of classification
> > "sources:" http://www.loc.gov/standards/sourcelist/classification.html
> >
> > The codes are meant to be used in MARC Bib 084 $2.
> >
> > Although we never formally published it, we actually turned that list into
> RDF and added it to ID.LOC.GOV.  We didn't bring it to completion because
> we noted there were two distinct ways to publish the list with respect to
> possible use and never quite resolved that question before our attentions
> were turned to bigger things.  Regardless, the point being is this: we could
> actually leverage a fair amount of existing work to create a solid base set of
> URIs to unambiguously identify the "source" of the classification.  So not just
> a few big ones could be immediately covered, but many smaller ones too
> (there are at least 149 entries on that list).
> >
> > Yours,
> > Kevin
> >
> > p.s.  Nate, before someone else points this out :) , and do know I actually
> wasn't looking for it (it was news to me), but the Chinese library classification
> (code: clc) is actually on the list!
> >
> >
> >
> >> -----Original Message-----
> >> From: Bibliographic Framework Transition Initiative Forum
> >> [mailto:[log in to unmask]] On Behalf Of [log in to unmask]
> >> Sent: Tuesday, July 22, 2014 5:13 PM
> >> To: [log in to unmask]
> >> Subject: Re: [BIBFRAME] Deproliferation of Predicates
> >>
> >> Although the question was addressed to Rob Sanderson, I'm going to
> >> take the liberty of opining:
> >>
> >> Let's invent a local scheme:
> >>
> >> local:ScientificDataSetClassification rdfs:subClassOf bf:Classification .
> >>
> >> local:EnvironmentalScienceDataSet a skos:Concept ;
> >>     skos:inScheme local:ScientificDataSetClassification .
> >>
> >> local:PhysicsDataSet a skos:Concept ;
> >>     skos:inScheme local:ScientificDataSetClassification .
> >>
> >> and so forth. With that published, we can use it in Linked Data.
> >> Kevin Ford made the point in another thread that it's often a good
> >> practice to use local URIs for things about which you want to make
> >> assertions, but which you don't "own" yourself. Here's an example of
> >> why. If Bibframe were to adopt and support a new
> >> bf:DataSetClassification corresponding to the above, we could switch
> >> over to using it, and we could republish the RDF with the first statement
> replaced:
> >>
> >> local:ScientificDataSetClassification owl:sameAs bf:DataSetClassification .
> >>
> >> but we wouldn't have to completely rework all of our metadata to
> >> respond to a shift in Bibframe. From my perspective, the move here is
> >> to shift the evolution of such entities (classification schemes and
> >> identifiers are good
> >> examples) out of our metadata and into the community that supports
> >> it, while at the same time reaping the benefits that come with having
> >> identifiers and not labels (literals) as values in our metadata. When
> >> anyone can publish a new classification scheme (for example) without
> >> disrupting other people using Bibframe, space is opened up for that
> >> kind of evolution in a healthy way, without losing the benefits of a
> >> controlled process for the evolution of core ideas (which, in this
> >> example, would be the generic notion of a classification scheme).
> >> (For example, if I worked at a small public library that couldn't
> >> care less about scientific data sets, I'm not called upon at any
> >> point in the above-imagined process to do anything to my metadata.) At
> the same time, the shared model grows no more than is really needed.
> >>
> >> ---
> >> A. Soroka
> >> The University of Virginia Library
> >>
> >> On Jul 22, 2014, at 4:47 PM, "Trail, Nate" <[log in to unmask]> wrote:
> >>
> >>> Rob,
> >>>
> >>> Well, we seem to have a list of a handful of the big classification
> >>> schemes
> >> (in the current bibliocentric world), but nothing from China or from
> >> some new data format or wherever else; what do we do with their
> >> schemes when we express their data in our systems, before they become
> >> so generally accepted in BIBFRAME that they get their own? How do we
> >> express a local classification scheme?
> >>>
> >>> Nate
> >>>
> >>> From: Bibliographic Framework Transition Initiative Forum
> >> [mailto:[log in to unmask]] On Behalf Of Robert Sanderson
> >>> Sent: Tuesday, July 22, 2014 4:33 PM
> >>> To: [log in to unmask]
> >>> Subject: Re: [BIBFRAME] Deproliferation of Predicates
> >>>
> >>>
> >>> Hi Nate,
> >>>
> >>> -------------------------------------
> >>> However, even better given the query optimization scenario would be:
> >>>      _:x bf:classification [ a bf:NlmClassification ; value "123" ]
> >>> -------------------------------------
> >>> Haven't you gone here from deproliferating properties to
> >>> proliferating
> >> classes?  If we did this, wouldn't we also have to have these classes:
> >>>
> >>> I have, yes :) But at the same time, getting rid of the string
> >>> literals in
> >> scheme, and indeed, the scheme property all together.  So a net
> >> reduction in the model, and a net increase in simplicity and ease of
> querying.
> >>>
> >>> and you'd still probably need the generic bf:Classification and a
> >>> way to say
> >> what scheme it represents, as we develop or accept new mechanisms to
> >> organize new types of material that don't rise yet to the level of
> >> having their own class?
> >>>
> >>> I don't follow that, I'm afraid. Why wouldn't we (the community)
> >>> give new
> >> Classification types their own subclass?
> >>>
> >>> Rob
> >>>
> >