Specifying cardinality
About
Cardinality refers to how many values a particular field is required or allowed to have
Example
In the following schema, the column heading "multiplicity" is mapped to "cardinality":
| record | field | key | multiplicity | range | desc | schema.org |
|---|---|---|---|---|---|---|
> class |
slot | identifier | cardinality | range | description | exact_mappings: {curie_prefix: sdo} |
| - | id | yes | 1 | string | any identifier | identifier |
| - | description | no | 0..1 | string | a textual description | description |
| Person | has medical history | no | 0..* | MedicalEvent | medical history | - |
Here, the cardinalities state:
- there must be exactly one
id - there may be a
description - zero to many medical history events
How it works
See configschema.yaml for all possible vocabularies, these include:
- UML strings, e.g. '0..1'
- text strings matching the cardinality vocabulary, e.g. 'zero to one'
- codes used in cardinality vocabulary, e.g. O, M, ...
The vocabulary maps to underlying LinkML primitives: