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title | parent | nav_order |
---|---|---|
Common Identifiers | Data Model | 1 |
There are two key identifiers that are used across data sets.
We use ISBNs for a lot of data linking. In order to speed up ISBN-based operations, we map textual ISBNs to numeric 'ISBN IDs`.
The isbn_id
table manages ISBN IDs and their mappings:
Column | Purpose |
---|---|
isbn_id | ISBN identifier |
isbn | Textual ISBNs |
Each type of ISBN (ISBN-10, ISBN-13) is considered a distinct ISBN. We also consider other ISBN-like things, particularly ASINs, to be ISBNs.
Most derived tables that work with ISBNs use isbn_id
s.
We also use book codes, common identifiers for integrated 'books' across data sets. These are derived from identifiers in the various data sets, with bc_of_*
functions. Each book code source is assigned to a different 10M number band so we can, if needed, derive the source from a book code.
Source | Function | Numspace |
---|---|---|
OL Work | bc_of_work |
10M |
OL Edition | bc_of_edition |
20M |
LOC Record | bc_of_loc_rec |
30M |
GR Work | bc_of_gr_work |
40M |
GR Book | bc_of_gr_book |
50M |
LOC Work | bc_of_loc_work |
60M |
LOC Instance | bc_of_loc_instance |
70M |
ISBN | bc_of_isbn |
90M |
The LOC Work and Instance sources are not currently used; they are intended for future use when we are able to import BIBFRAME data from the Library of Congress.
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