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-rw-r--r--guide/src/entity_release.md17
1 files changed, 10 insertions, 7 deletions
diff --git a/guide/src/entity_release.md b/guide/src/entity_release.md
index 842e9d55..ca999b6e 100644
--- a/guide/src/entity_release.md
+++ b/guide/src/entity_release.md
@@ -135,27 +135,30 @@ complete or correct in more obscure cases.
entities instead.
- `isbn13` (string): external identifier for books. ISBN-9 and other formats
should be converted to canonical ISBN-13.
-- `pmid` (string): external identifier for PubMed database. These are bare
+- `pmid` (string): external identifier for the PubMed database. These are bare
integers, but stored in a string format.
- `pmcid` (string): external identifier for PubMed Central database. These are
integers prefixed with "PMC" (upper case), like "PMC4321". Versioned PMCIDs
can also be stored (eg, "PMC4321.1"; future clarification of whether versions
should *always* be stored will be needed.
-- `core` (string): external identifier for the [CORE] open access
- aggregator. These identifiers are integers, but stored in string format.
+- `core` (string): external identifier for the [CORE][] open access
+ aggregator. Not used much in practice. These identifiers are integers, but
+ stored in string format.
- `arxiv` (string): external identifier to a (version-specific) [arxiv.org][]
work. For releases, must always include the `vN` suffix (eg, `v3`).
-- `jstor` (string): external identifier for works in JSTOR.
-- `ark` (string): ARK identifier
+- `jstor` (string): external identifier for works in JSTOR which do not have a
+ valid registered DOI.
+- `ark` (string): ARK identifier.
- `mag` (DEPRECATED; string): Microsoft Academic Graph (MAG) identifier. As of
December 2021, no entities in the catalog have a value for this field.
- `doaj` (string): [DOAJ](https://doaj.org) article-level identifier
- `dblp` (string): [dblp](https://dblp.org) article-level identifier
- `oai` (string): OAI-PMH record id. Only use if no other identifier is available
- `hdl` (string): [handle.net](https://handle.net) identifier. While DOIs are
- technically handles, do not put DOIs in this field. Handles are transformed
- to lower-case in database.
+ technically handles, do not put DOIs in this field. Handles are normalized
+ to lower-case in the catalog (server-side).
+[CORE]: https://core.ac.uk/
[arxiv.org]: https://arxiv.org
#### `extra` Fields