MARC Schema: missing tags

[jorol]

Missing tags:

• [ ] 09x https://www.loc.gov/marc/bibliographic/bd09x.html

• [ ] 59x https://www.loc.gov/marc/bibliographic/bd59x.html

• [ ] 9xx not part of the standard, but in common use, see https://www.loc.gov/marc/bibliographic/bd9xx.html and https://www.oclc.org/bibformats/en/9xx.html. I'm not sure what's the best way to handle them...

[pkiraly]

There is a model to use those elements, but it requires the publication of local tag definitions. The codebase contains the following non MARC21 namespaces:

• Ghent (de.gwdg.metadataqa.marc.definition.tags.genttags) - for records from Universiteitsbibliotheek Gent
• FENNICA (de.gwdg.metadataqa.marc.definition.tags.fennicatags) - for the Finnish national bibliography
• DNB (de.gwdg.metadataqa.marc.definition.tags.dnbtags) - for the Deutsche Nationalbibliothek database
• OCLC (de.gwdg.metadataqa.marc.definition.tags.oclctags) - for the OCLC MARC (it does not cover the complete OCLC Marc, only those I found in usage)
• SZTE (de.gwdg.metadataqa.marc.definition.tags.sztetags) - for University of Szeged (Hungary)

So my idea would be that

1. The custom fields could be defined inside the library
2. The custom fields could be added arbitrary in a configuration file

[jorol]

Thanks for the information and links. I'm just using marc-schema.json in MARC::Schema. I think I will handle these fields via an enhanced schema definition as you do with the non MARC21 namespaces.