Last Call Comment: Non Assignable Concepts

Raised by:
Sean Bechhofer
Opened on:
Raised by Michael Panzer [1]:

1. Non-assignable concepts

Classification systems usually contain objects that are, while not being
assignable concepts, nonetheless an integral part of the system (not
just a display/presentation device), e.g., number spans or - in case of
the DDC - so-called "centered entries":

T2-486-T2-488 Divisions of Sweden
333.7-333.9 Natural resources and energy  

A centered entry represents a subject covered by a span of numbers.
Centered entries relate notationally coordinate classes together as a
single concept. For example, T2-485 represents Sweden; the centered
entry T2-486-T2-488 represents the geographic divisions of Sweden.
Centered entries are an important part of the structural hierarchy,
representing true broader concepts, even though this superordination is
not indicated by notation. In addition, as they often contain
instructions applicable to all subordinate classes, centered entries
cannot be modeled as a skos:Collection, since skos:Collection cannot be
part of the concept hierarchy (as defined in 9.6.4). A new class or
expanded skos:Collection class is required to allow concept collections
like spans or centered entries to be expressed as concepts.


Related emails:
  1. ISSUE-181: Last Call Comment: Non Assignable Concepts (from on 2008-10-08)
  2. Re: SKOS comment: Last Call Working Draft (from on 2008-10-08)
  3. LC Comments: Classification Schemes (from on 2008-10-09)
  4. Re: LC Comments: Classification Schemes (from on 2008-10-13)
  5. [SKOS] ISSUE-181 (was Re: LC Comments: Classification Schemes) (from on 2008-10-14)
  6. ISSUE-181 draft response (from on 2008-10-16)
  7. ISSUE-181 new draft response (from on 2008-10-22)
  8. meeting record: 2008-11-04 SWD telecon (from on 2008-11-04)
  9. [SKOS] Re: SKOS comment: Last Call Working Draft [ISSUE-181] (from on 2008-11-06)
  10. [SKOS] Re: SKOS comment: Last Call Working Draft [ISSUE-181] (from on 2008-11-06)
  11. [SKOS] Re: SKOS comment: Last Call Working Draft [ISSUE-181] (from on 2008-11-06)
  12. [SKOS] Re: SKOS comment: Last Call Working Draft [ISSUE-181] (from on 2008-11-04)
  13. [SKOS] Update on Last Call Comments (from on 2008-12-02)

Related notes:

2008-11-10: ACTION: Accept

2008-11-11: CHANGE-TYPE: None

2008-11-11: RESOLUTION: If I understand it correctly, your issue is that instances of skos:Collection cannot be included in hierarchies. Otherwise you could have represented your "centered entities" as collections. As you noted, we clearly distinguish the two "groupings" and "semantic networks" notions [6], and your "centered entities" cannot be modelled as Collections. Also, your "non-assignable concepts" heading hints that another solution would be possible, had we proposed a solution to the requirement R-IndexingAndNonIndexingConcepts [2]. Indeed, I guess your "non-assignable" concepts can be likened to what we called "non-indexing concepts". But R-IndexingAndNonIndexingConcepts has been dropped [4], as the indexing property requirement ISSUE-48 [3] (see note (1)). As a consequence of these problems having beeing already being extensively discussed, we propose to *close* ISSUE-181 [ISSUE-181], making no change to the existing SKOS documents. *We hope that you are able to live with this.*

2008-12-15: Closed with no response from commenter.

2008-12-16: COMMENTER-RESPONSE: None