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uwlib-cams / MARC2RDA

mapping between MARC21 and RDA-RDF
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052 geographic classification #84

Open CECSpecialistI opened 2 years ago

CECSpecialistI commented 2 years ago

https://github.com/uwlib-cams/MARC2RDA/blob/main/Working%20Documents/0XX.csv

pennylenger commented 11 months ago

@CECSpecialistI Hi, I still cannot figure out how to do apply following format or structure into mapping. [Work] → has subject place → [Place] (if source is identified by first indicator, try to look up URI from source). Should I construct a structure like [work] + has subject place +[place] in Transformation Notes, and how I can look up URI for Code source # - Library of Congress Classification 1 - U.S. Dept. of Defense Classification. And where should I put subfield like Geographic classification area code (NR) into this structure?

is above for element has subject place and following for identifier :

If no URI for [Place] Then [Place] → has nomen for place → [Nomen] [Nomen] → has nomen string → [code] [Nomen] → has scheme of nomen → [URI for code source specified in 1st indicator or $2 if 1st indicator is 7] I am also not clear about how to map identifier with above structure.

CECSpecialistI commented 11 months ago

Hi Penny,

Transformation notes don't have a pre-defined structure, and are just meant to be human-readable for the folks writing the transform. Accounting for the basic structure of [work] has subject place [place] is a great start, and indicating the structure for when there is or is not a URI that can be looked up for the place can be done either through a similar shorthand or could be written out. Let's walk through it when we meet later today.

cspayne commented 2 months ago

Hi @pennylenger, Gordon's document indicates that there was no usage of $0 or $1 in the classification fields. Should I still follow the mapping $0 in the Google Sheet in this case?

cspayne commented 2 months ago

It also looks like the $b value indicates multiple places when repeated, so should each $b value result in a new place minted where the nomen string for the identifier is $a + $b?

pennylenger commented 2 months ago

Hi @pennylenger, Gordon's document indicates that there was no usage of $0 or $1 in the classification fields. Should I still follow the mapping $0 in the Google Sheet in this case?

I don't think so. Can we change $0 and $1 to not mapped?

pennylenger commented 2 months ago

It also looks like the $b value indicates multiple places when repeated, so should each $b value result in a new place minted where the nomen string for the identifier is $a + $b?

I think so. It is better to mint a new place for different $a + $b.

cspayne commented 2 months ago

Is $d also minted as a separate place from $a and $b?

pennylenger commented 2 months ago

not necessary

GordonDunsire commented 2 months ago

@pennylenger, @cspayne: Confirming that the combination of subfield $a + $b for each $b is a distinct place.

cspayne commented 1 month ago

@AdamSchiff @GordonDunsire Does the U.S. Dept. of Defense Classification have a code or IRI? I cannot locate one in LoC's Classification Schemes. If not, should we use the whole name as the source part of the IRI?

AdamSchiff commented 1 month ago

I don't see one listed at https://id.loc.gov/vocabulary/classSchemes.html Classification Schemes - LC Linked Data Service: Authorities and Vocabularies | Library of Congresshttps://id.loc.gov/vocabulary/classSchemes.html Classification Schemes contains a list of classification schemes and assigns a URI to each scheme. The purpose of these properties is to permit users to associate classification numbers with the appropriate classification scheme. An individual URI has been assigned for each edition of Dewey. id.loc.gov

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GordonDunsire commented 1 month ago

@cspayne: I think that 'U.S. Department of Defense Classification' is a subset of 'Superintendent of Documents Classification' (see the Wikipedia article) so it is safe to use the IRI http://id.loc.gov/vocabulary/classSchemes/sudocs as the class scheme.