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Example of coordination with DDC

From: Jakob Voss <jakob.voss@gbv.de>
Date: Tue, 01 Aug 2006 12:27:24 +0200
Message-ID: <44CF2C8C.3020407@gbv.de>
To: public-esw-thes@w3.org

Hi,

The Dewey Decimal Classification (DDC) is widely used worldwide. It
contain many rules how to build new classes (concepts) and numbers
(notations) from existing numbers and tables. The Dewey blog contains
examples, for instance the current entry about provinces in Indonesia:

http://ddc.typepad.com/025431/2006/07/provinsi_indone.html

The example uses the DDC number "551.220959827090511" - it's build the
following way:

551.22  Earthquakes
--09    Historical, geographic, persons treatment (Table 1)
--59827 Yogyakarta (Table 2)
--09    Historical and geographic treatment
--0511  for 2000-2009

You can treat this as a simple monohierarchical tree:

551.220959827090511 skos:broader 551.220959827
551.220959827 skos:broader 551.22
551.22 skos:broader 552.2
552.2 skos:broader 552
552 skos:broader 55
55 skos:broader 5

But it can also be treated like a coordination of terms:

551.22 (Earthquakes)
T2--59827 (Yogyakarta)
T1--090511 (2000-2009)

The more I think about it - coordination (and mapping, that is a similar
concept) is not an SKOS extensions but an essential feature and only
little work has been done:
http://isegserv.itd.rl.ac.uk/public/skos/press/dc2006/coordination.html

As far as I understand Alistair we could model 551.220959827090511:

<551.220959827090511>
  skos:broader <551.220959827>
  skos:coordinationOf (
    <551.22>
    <T2--551.22>
    <T1--59827>
  )

<551.220959827>
  skos:broader <551.22>
  skos:coordinationOf (
    <551.22>
    <T2--551.22>
  )

<551.22>
  skos:broader <551.2>

..

Greetings,
Jakob

P.S: I hope there is no error in the DDC notation (I'm no real expert in
DDC).
Received on Tuesday, 1 August 2006 10:27:12 GMT

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