Salpynx

My Wikipedia page.

LOC ISBN formatting, only works reliably for English and some European geo-coded ISBNs. {{Format ISBN}} does more.
ISSN lookup: https://portal.issn.org/
Python utility for hyphenating ISBNs (updatable from official ISBN data source)
The code I use to fix up ISBNs and other bib IDs. Not perfect — I always manually review and touch up the changes it suggests.

{{ISBN}} for ISBNs.
{{ISBNT}} for bare ISBNs.
{{SBN}} for early 9-digit SBNs.
{{OCLC}} for OCLC numbers.
{{doi}} for digital object identifiers.
{{ISSN}} for ISSNs.
{{cite book}} Book citations.
{{cite journal}} Journal citations.
{{cite magazine}} Magazine citations.
{{cite web}} Web citations.
{{text}} Escape ISBNs in journal book review titles per Wikipedia_talk:WikiProject_Check_Wikipedia/ISBN_errors#New_nowiki_self-closed_tag_"error"_detected to avoid false matching by Wikipedia:WPCleaner.
- e.g.:
```
{{cite journal|title= ... {{text|ISBN:}} 0‐8243‐4301‐8 ...}}
```
{{EAN}} 13 digit identifiers starting with 997 are magazines/serial EAN product codes. Potentially useful for comics? Some books do have region coded EANs (generally not encyclopedia quality... but there could be exceptions).
{{Verify source}} I'm finding many (closed access) journal book reviews used as refs for statements about a subject, which are suspicious. Shouldn't the book be cited directly? I suspect that some Wiki tools make these refs easier to find and auto-add than the book content. Books reviews make good refs for statements about a book or author, not necessarily about the book's subject. Book author is presumably more of an authority on topic X than the reviewer: {{Verify source|date=November 2024|reason=Book review, not direct source}}