The name of a controlled vocabulary (defined formally) or a generic vocabulary (subject area defined informally), taxonomy, ontology, database, term list, thesaurus, index, etc. that is the source of the term.
| Value | Meaning |
|---|---|
| Text, numbers, or special characters | The name of the vocabulary, taxonomy, ontology, database, term list, index, etc. that is the source of the term named in the element’s content. |