Identifier of the authority that defined the abbreviation (for example, “nlm-ta” for an NLM title abbreviation, “publisher” for a publisher-specific abbreviation).
| Value | Meaning |
|---|---|
| Text, numbers, or special characters | A name, acronym, or descriptive word naming the authority responsible for the abbreviation, for example, “publisher”, meaning that the publisher of the article assigned the abbreviation. |
| Restriction: | |