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RE: ISSUE-131: Last Call Comment: mappings with a boolean expression

From: De Smedt Johan <Johan.DeSmedt@wkb.be>
Date: Thu, 6 Nov 2008 19:27:18 +0100
Message-ID: <3AD9510C40516241AEAEA6DCE2F959B26277F5@MAILSRV1.wkb.int>
To: "Alistair Miles" <alistair.miles@zoo.ox.ac.uk>
Cc: <public-swd-wg@w3.org>

Thanks very much Alistair, 

It is clear In my projects on this I will proceed with a proprietary
extension.
If there is any activity in the future to work around this I am much
interested.

kr, Johan De Smedt. 
===================
-----Original Message-----
From: Alistair Miles [mailto:alistair.miles@zoo.ox.ac.uk] 
Sent: Thursday, 06 November, 2008 18:56
To: Johan De Smedt
Cc: public-swd-wg@w3.org
Subject: ISSUE-131: Last Call Comment: mappings with a boolean
expression 

Dear Johan,

Many thanks for your comment and suggestions, your attention to detail
is appreciated.

In respect of your comment:

"""
The mapping constructs are not practical for expressing the mapping
between concepts in the following use case.
(maybe this use case is not considered as part of the skos objective,
then please ignore the remark)

- ConceptSchema csA, csB, ... are used to classify content
  Typically csA, csB, ... are large and complex content schemes, used by
experts and/or expert tools
- Taxonomies tM, tN, ... are used in a an custom [i.e. target audience
specific] application
  Typically tM, tN, are made at hoc and are not used for direct content
classification (This exclusion need not be absolute)
- A seach expressed in terms/concepts of tM, tN, ...
  must be resolved by a one-way mapping (tN & tM & ...) ->
boolean-expression-of(csA * csB * ... )

Multiple of these mappings allow content to be uniquely indexed (indexed
over csA, cs B, ...) While supporting reuse of that indexed content in
different search strategies for different audiences (user query
specifies concepts from tM, tN, ...)

The current mapping does not address such mappings (with a boolean
expression)
"""

The Working Group has considered mappings between concepts and
Boolean-like expressions. This fell within the scope of two issues:
[ISSUE-39] and [ISSUE-40].

In [1] it was proposed not to include any boolean-like grouping
constructs in SKOS, because this would require a substantial addition to
the theoretical foundations of SKOS. This was discussed during the
2007-12-18 telecon and became part of the resolution to ISSUE-39 adopted
by the Working Group.

Any third party is, of course, free to define an extension for SKOS
which provides a vocabulary for complex, boolean-like mapping
expressions, and which ideally would also develop the necessary theory
to allow those expressions to be used in query translation software.
This, however, has been deemed out of scope for the current SKOS
Recommendation Track work.

Can you live with this?

Thanks again,

Alistair Miles
Sean Bechhofer

[ISSUE-39] http://www.w3.org/2006/07/SWD/track/issues/39
[ISSUE-40] http://www.w3.org/2006/07/SWD/track/issues/40
[1] http://lists.w3.org/Archives/Public/public-swd-wg/2007Dec/0025.html
[2] http://www.w3.org/2007/12/18-swd-minutes

--
Alistair Miles
Senior Computing Officer
Image Bioinformatics Research Group
Department of Zoology
The Tinbergen Building
University of Oxford
South Parks Road
Oxford
OX1 3PS
United Kingdom
Web: http://purl.org/net/aliman
Email: alistair.miles@zoo.ox.ac.uk
Tel: +44 (0)1865 281993
Received on Thursday, 6 November 2008 18:28:11 GMT

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