...
In addition, we wanted to review how many catalog records may relate to a temporal or geographic subject heading.
| Description | Number and filters |
|---|---|
| Catalog records with geographic subject heading | 3,220,876 (using field subject_geo_filing) |
| Catalog records with temporal subject heading | 959,900 (using field subject_era_filing) |
(* Note the numbers above were retrieved 02/03/2022)
...
- 1,340,603 distinct Wikidata entities which use an LOC identifier. (We used the property P244).
- 51,864 Wikidata entities pointing to an LOC identifier starting with "sh" (i.e. subject heading)
- 1,289,158 Wikidata entities pointing to an LOC identifier starting with "n" (i.e. name headings)
- 1,342,872 distinct LOC identifiers designated for Wikidata entities (i.e. this many unique identifiers are found in the object position for P244
- 51,824 LOC identifiers which start with "sh" i.e. subject headings
- 1,290,993 LOC identifiers which start with "n" i.e. name headings
(*Note wikidata results were retrieved 2/3/2022)
We also used LCSH mappings from PeriodO which contain 1478 total mappings (as of 2/3/2022).