Unique identifier for the PsycINFO record associated with the item. (Formerly referred to as an accession number or PsycINFO Control Number picn.) Not all items will have an associated PsycINFO record; for example, ads and indexes are not covered in PsycINFO.
This is an APA-specific (non-NLM) attribute.
| Value | Meaning |
|---|---|
| Text, numbers, or special characters. | PsycINFO unique identifier number |
| Restriction: This attribute may be specified if the element is used. | |