Property talk:P4953

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Library of Congress Genre/Form Terms ID
ID in the Library of Congress controlled vocabulary for genres and forms

Represents	Library of Congress Linked Data Service (Q17109002)
Associated item	Library of Congress (Q131454)
Applicable "stated in" value	Library of Congress Genre/Form Terms (Q47537953)
Data type	External identifier
Allowed values	gf\d{10}
Example	rock opera (Q253137) → gf2017026056 (RDF) cookbook (Q605076) → gf2011026169 (RDF) ghazal (Q281111) → gf2014026355 (RDF) radio comedy (Q1748941) → gf2011026490 (RDF)
Source	http://id.loc.gov/authorities/genreForms.html
Formatter URL	https://id.loc.gov/authorities/genreForms/$1
Related to country	United States of America (Q30) (See 762 others)
See also	Library of Congress authority ID (P244), Art & Architecture Thesaurus ID (P1014), Newspaper Genre List ID (P9648), OLAC video game genre vocabulary ID (P6352)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other external identifier Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Mix'n'match (Report) Database reports/Constraint violations/P4953 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 1,977 Main statement 1,936 out of 2,667 (73% complete) 97.9% of uses Qualifier 4 0.2% of uses Reference 37 1.9% of uses
Search for values

[create Create a translatable help page (preferably in English) for this property to be included here]

Single value: this property generally contains a single value. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: catalogue (Q2352616)
List of violations of this constraint: Database reports/Constraint violations/P4953#Single value, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: Q186424, Q6585139, Q103076, Q2743287, Q9748, Q779024, Q47009776, Q1341051, Q197949, Q3919251, Q1338914, Q8274, Q470137, Q16363676, Q121608810, Q121608489, Q121662778, Q2155304, Q121664244, Q121663256, Q121664731, Q121665191
List of violations of this constraint: Database reports/Constraint violations/P4953#Unique value, SPARQL (every item), SPARQL (by value)

Format “gf(19|20)\d{8}”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P4953#Format, hourly updated report, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P4953#Entity types

Scope is as main value (Q54828448), as reference (Q54828450): the property must be used by specified way only (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P4953#Scope, SPARQL

Qualifiers “subject named as (P1810), reason for deprecated rank (P2241), alternative name (P4970), mapping relation type (P4390), reason for preferred rank (P7452), scope note (P9570), broader concept (P4900), identifier shared with (P4070), has characteristic (P1552)”: this property should be used only with the listed qualifiers. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P4953#allowed qualifiers, SPARQL

Progress

I've started trying to match entries to items using OpenRefine. So far I've gone through the machine-suggested matches; I'm now working through the rest, to see what I can match manually. (I'm currently working through 'music').

See

• Property talk:P4953/entries

for a hierarchical listing of all of the entries in the thesaurus, with matched entries linked to corresponding items.

As a caution, be aware that some of the matches I've made so far may be quite loose -- ie the nearest item that seemed to me relevant, so in some cases mapping relation type (P4390) = rather than related match (Q39894604) rather than exact match (Q39893449) or even close match (Q39893184).

I intend to mark these up as such once I've completed the initial matching pass; and along the way also add qualifiers like subject named as (P1810) and mapping relation type (P4390), and broader concept (P4900) to reflect the structure of the external thesaurus. Jheald (talk) 17:50, 21 March 2018 (UTC)

Distinct Value?

I don't think this should be a distinct value. Isn't it meant to be used to identify Rock operas, not just as an identifier under Rock opera? For instance, Tommy would get the code showing it to be a rock opera. Dbigwood (talk) 16:40, 26 June 2020 (UTC)

OK now I understand better. There needs to be a new Property Library of Congress Genre/Form Terms ID (works and editions). Just as there is Library of Congress Classification and Library of Congress Classification (works and editions)