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BIBFRAME  December 2017

BIBFRAME December 2017

Subject:

Re: 600 field with $t: what does the $0 represent?

From:

Mary Mastraccio <[log in to unmask]>

Reply-To:

Bibliographic Framework Transition Initiative Forum <[log in to unmask]>

Date:

Thu, 7 Dec 2017 11:43:24 -0600

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (117 lines)

Karen,

There was a paper put out some time ago that discussed "subfield sequencing" as an option. I don't think it applied to a name/title situation (although it could be argued that it is as valid as a name/topic with free-floating subdivisions). The idea was that if each piece of the string could be linked to an authority then the $0 could come immediately after the part it validated.

650 $a topic $0 topic authority $z geographic subdivision $0 geographic authority

I can't find the document now. As early as 2010-DP02 references are made to subfield sequencing so it is possible the paper I saw pre-dates that.

Mary L. Mastraccio
Director of Cataloging and Authorities
MARCIVE, Inc.
San Antonio, TX 78265
800-531-7678
www.marcive.com

  

-----Original Message-----
From: Bibliographic Framework Transition Initiative Forum [mailto:[log in to unmask]] On Behalf Of Karen Coyle
Sent: Thursday, November 30, 2017 3:50 AM
To: [log in to unmask]
Subject: Re: [BIBFRAME] 600 field with $t: what does the $0 represent?

I have this vague recollection of discussions regarding the $0 that it
could be repeatable, and that the $0 would refer to the immediately
preceding subfields. Something like:

600 $a author $0 author authority $t title

There is precedent for interpreting MARC subfields based on their
position within the field. I can't find this within the proposals and
discussion papers, however. (Nor am I saying that it would be a good
solution. I can see advantages and disadvantages.)

Unfortunately, I don't see anything in the MARC documentation that
states that the $0 refers to the entire field and all of its subfields,
nor that it is always placed after all of the a-z subfields. If that is
the intention it would be good to state that where the $0 is defined.[1]

kc
[1] http://www.loc.gov/marc/bibliographic/ecbdcntf.html

On 11/28/17 2:44 AM, Osma Suominen wrote:
> Hi Steven!
>
> Thanks for your excellent answer! This was really helpful.
>
> Steven Michael Folsom kirjoitti 27.11.2017 klo 22:39:
>> I informally polled the PCC URIs in MARC Task Group, and those that
>> responded agreed:
>>
>> - With the presence of a $t, the $0 should refer to a Work. (The
>> converter is working as expected.*)
>> o This would go for 700 $a$t and other fields as well.
>
> That's what I suspected. Thanks for confirming.
>
>> - There should not be a URI for the Author in that field as the author
>> alone does not represent the entire subject of the work as defined by
>> the cataloger.  [The Task Group would like to promote a practice of
>> not including $0 URIs that represent different objects from the
>> (albeit implicit) objects of the "triple" in MARC. There's a subgroup
>> working on making clearer when certain subfields trigger different
>> types of resources.]
>> o Just to be clear, if the text was about the Author (without a $t), a
>> $0 for the Author would be advisable.
>> o If there are not URIs for the Work, there should not be $0 in the
>> field. That shouldn't stop the converter from creating one, but I
>> think we can all agree stable/canonical Work URIs would be great. (
>
> Right. I agree, this sounds sensible. So we should just strip the $0
> subfields (with author id's) from the x00 records with $t that currently
> have them.
>
> Unfortunately this means that, since we don't have work IDs yet, we
> don't have any ID to place instead in those x00 $0 subfields and the
> work/author combination is only identified by the work title and the
> author name, but without specifying the author ID. I can live with that
> but it means I have to do some post-processing to merge these authors
> with the ones that do have IDs. I've already implemented that in my
> processing pipeline [1] but it means I have to rely on matching names
> even though I could in theory have used person IDs instead.
>
>> - *With respect to converters, perhaps when there is a URI in the $0,
>> the converter should not assert a type on the resource. Rather, the
>> RDF generated from the converter could just link to the resource, and
>> not try to further describe it. In theory, the RDF description of the
>> resource will include its own type assertions.
>> o This assumes (as a colleague put it) the resource description isn't
>> too skimpy.
>> o I'm not sure if this is true, but would this complicate your work to
>> use the BF converter output as an intermediary to create schema.org
>> data? For things that already have URIs, are you creating schema
>> assertions about them that require knowing, for example, that
>> something from the converter is a bf:Work?
>
> Not sure this would be helpful. If there are reasonable conventions in
> action here, I think the converter should also assert the type of the
> resource, as it already does. So 600 with $t should become a Work and
> 600 without $t should become a Person. I think types like this are
> helpful, and I use them as "anchors" for my conversion to Schema.org, so
> losing them would make the conversion much more difficult. In many cases
> I don't have any more information about those identifiers, so extracting
> as much as possible from the MARC record is good. I think not asserting
> the types would probably complicate other applications too.
>
> -Osma
>
> [1] https://github.com/NatLibFi/bib-rdf-pipeline/issues/77
>

--
Karen Coyle
[log in to unmask] http://kcoyle.net
m: +1-510-435-8234
skype: kcoylenet/+1-510-984-3600

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