Marc21 allows to add persistent identifiers to `024 7?` by means of subfields `$2` and `$a`. E.g. one could give the DOI of an eBook as ``` 024 7_ $2doi $a 10.000/123.456.789 ``` For `$2` the LoC refers to the list of standard identifiers, that is actually quite long: https://www.loc.gov/standards/sourcelist/standard-identifier.html Currently, it seems Koha creates a link only if there is a URL in `856 4_` which requires duplication of data. Especially of scientific libraries it would be helpful if ids pointing to "well known" services that assign PIDs would also trigger such a display to point the users to the full texts. The most relevant in this context seem to be: - DOI - PMID - PMC - arXiv - handle - urn In other contexts OpenLibrary was also mentioned.
Created attachment 174425 [details] [review] Bug 38425: Add external links based on PIDs in 024 Render some (common) identifiers field 024 as links to external resources by evaluating `$2` and using the appropriate resolver URL. Currently implemented values for `$2`: arXiv, doi, inspire, openlibrary, pmc, pmid. The patch includes adds the class `resource_list` to the intranet scss to be able to use the identical XSLT code as for the OPAC. Test plan: 1. Open intranet interface and edit any record 2. Add several 024 fields with the following subfield layout: - $2 doi $a 10.2147/CIA.S157877 - $2 pmid $a 29942120 - $2 pmc $a PMC6005330 - $2 arxiv: $a arxiv:2411.05889 - $2 inspire $a 2835154 - $2 openlibrary $a OL27448W (May be all or any combination. The values of $a would not matter, the above just gives valid links to the external system in question.) 3. Check intranet detail display of the record: nothing appears 4. Check OPAC detail display of the record: nothing appears 5. Apply the patch 3. Check intranet detail display of the record. It now gives a new line: External Resource(s): <here links to whatever was added in step 2) The ids are clickable and lead to the external system 4. Check OPAC detail display of the record: External Resource(s): <here links to whatever was added in step 2) The ids are clickable and lead to the external system Sponsored-by: Deutsches Elektronen-Synchrotron DESY, Library