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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Am 09.09.2015 um 08:51 schrieb Karen Coyle: > At the moment, BF has a property for "identifierStatus", presumably to > carry the information that is now in the MARC $z of many identifier fi elds. > $z - Canceled/invalid > > In the serials area it is more complex, as the ISSN has: > > $m - Canceled ISSN-L (R) > $y - Incorrect ISSN (R) > $z - Canceled ISSN (R) > > > As a qualifier on the identifier, this means that many uses of the > identifier need to check the qualifier to see if the identifier is val id > because they will only want to operate on valid identifiers (e.g. for > linking). That strikes me as a bad idea, especially since the vast > majority will be valid. > > Another option is to treat the invalid/etc. identifiers as separate > properties, with their own relationship to the entity identified, or > with a relationship to a specific identifier. (The MARC format > unfortunately tends to have in the same field subfields that qualify t he > focus of the cataloging (the book, the journal) and subfields that > qualify or relate to other subfields in the field. So one has to decid e > whether the ISSN-L has a direct relationship to the ISSN or has a dire ct > relationship to the serial, and the same for invalid and canceled > identifiers. ) I had to look it up in the ISSN manual: There are two situations where a "cancelled ISSN" occurs (certain kinds of splits and merges) and there also are "deleted ISSNs" (the agency deletes the record because it was decided to be not on topic for the registry however other places still might proliferate an associated record carrying this identifier - who would know that?). For cancelled ISSN-L the manual refers to its section about ISSN-L but there is no mention of it. Since off-hand I can think of two different interpretations it must be left to further investigation whether cancellation as such can be considered an orthogonal additional property applicable to ISSN and ISSN-L or if there is "cancelled ISSN" as a property for ISSN and "cancelled ISSN-L" as a property for ISSN-L (see how we start reverse-engeneering the ISSN specification because we want to decide if and how some more abstract paradigms of operating a registry might apply to ISSNs? ) Other identifier systems might "support" identifiers which are declared obsolete in a different way and one could rather interpret them as divided in "preferred" and "deprecated" ones. So qualification of identifiers is very specific to the rules governing the identifier system in question, and like the identifier itself should not be questioned by Bibframe (i.e. must be transported faithfully and especially without remodeling), and interpretation of that qualification probably must always be left to applications. Providing alternative properties or a fixed vocabulary for "cases" in BF will probabliy only create friction: Different providers will encode the same situation in different ways, since mapping of the rules of the identifier system to a bibframe identifier typology will very much depend on interpretation. Perhaps one could add bibframe:meta-qualifiers where the provider of the data can declare one identifier as being "best" to his knowledge. Another processing expectation would be that any unqualified identifier should be considered "valid" and "best"... viele Gruesse Thomas Berger -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iJwEAQECAAYFAlXv5RkACgkQYhMlmJ6W47MfpgQAu/jng824n3pt8xDckxNmZegS aervYzdoAk0Jd6GW3Bo3r1WgiBayD2ZwbH6Q+epnWFCaaC8Hr1qOkDgvfAcyHBy8 qvHTEOQL2uk/iCmWFsd4jxtLwFYF6RYnxcrLRvX58AENMVSSRuSsVafKd14kNShF SUhJawti0F41n7eDbBo= =1VF2 -----END PGP SIGNATURE-----