|Rob Tice||Sep 28, 2008 11:56 pm|
|De Smedt Johan||Sep 29, 2008 12:15 am|
|Sini, Margherita (KCEW)||Sep 29, 2008 1:30 am|
|Aida Slavic||Sep 29, 2008 2:13 am|
|De Smedt Johan||Sep 29, 2008 2:26 am|
|Sini, Margherita (KCEW)||Sep 29, 2008 2:32 am|
|Rob Tice||Sep 29, 2008 3:30 am|
|De Smedt Johan||Sep 29, 2008 4:05 am|
|Aida Slavic||Sep 29, 2008 4:06 am|
|Rob Tice||Sep 29, 2008 4:53 am|
|Sini, Margherita (KCEW)||Sep 29, 2008 5:05 am|
|Sini, Margherita (KCEW)||Sep 29, 2008 10:48 am|
|Houghton,Andrew||Sep 29, 2008 11:07 am|
|Sini, Margherita (KCEW)||Sep 29, 2008 9:13 pm|
|Alan Ruttenberg||Sep 29, 2008 9:29 pm|
|Sini, Margherita (KCEW)||Sep 29, 2008 11:00 pm|
|Alan Ruttenberg||Sep 29, 2008 11:26 pm|
|Antoine Isaac||Sep 30, 2008 2:55 am|
|Stephen Bounds||Sep 30, 2008 3:49 am|
|Leonard Will||Sep 30, 2008 4:43 am|
|Panzer,Michael||Oct 1, 2008 8:19 am|
|Joseph Tennis||Oct 1, 2008 1:02 pm|
|Sini, Margherita (KCEW)||Oct 1, 2008 1:04 pm|
|Alan Ruttenberg||Oct 2, 2008 3:16 am|
|Antoine Isaac||Oct 2, 2008 7:23 am|
|Alistair Miles||Oct 2, 2008 9:29 am|
|Sini, Margherita (KCEW)||Oct 2, 2008 11:27 am|
|Subject:||Re: revisions and change in skos|
|From:||Aida Slavic (ai...@acorweb.net)|
|Date:||Sep 29, 2008 4:06:33 am|
- scheme "AGRIS/CARIS Classification scheme" - scheme "AGRIS/CARIS Classification scheme (from 1975 to 1080) - Deprecated"
this is good approach when possible.
Because of the notational constraints - older schemes will have the following two situations/problems that can only be resolved through IDs - history of concept position in the scheme and history of labels - I give examples of UDC but this would be similar to all classification schemes that maintained for more than 50-100 years and are going through necessary restructuring to follow the development of science:
1. change of label (depricated labels)
In 1905 concept ID*00001 introduced represented with label A
Upon restructuring of the scheme in 1975 concept ID*00001" is moved to a new class (different hierarchy) hence this concept gets a new id ID*00999 and it gets a new label X (i.e. label X replaces label A (depricated) - X label is new (never used before) Relationship between ID*00001 and ID*00999 has to be established - but also the relationship between labels A - X
2. re-use of once depricted labels to denote new concept
In 1990 new concept ID*01333 introduced - and label A is re-used for this new concept (label A was before used to represent concept ID*00001 which is now represented with label X and has ID*00999)
In practice and in real life there will be collections using A to represent concept 00001 (old classification schedules) and those using A to represent concept 01333 (new classification schedules). Three will be need in disambiguating A(s) and linking IDs.
I now realise that two IDs for concept that *is* and *is not* the same :-) is also a very good example of what Johan calls 'concept versioning' - I would only say that it is better to use expression 'scheme versioning'
I am aware that the management of label version may be simplified and made more logical and elegant - but this would be a luxury only modern schemes can afford. Old data and its use pose many constraints.