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Hi,<br>
<br>
I am one of those who like SKOS quite well, and I wrote an early
draft of expressing Darwin Core taxonomies based on SKOS.<br>
You can see it here:
<a class="moz-txt-link-freetext" href="http://www.w3.org/egov/wiki/Linked_Environment_Data">http://www.w3.org/egov/wiki/Linked_Environment_Data</a><br>
I had some discussion with Roger Hyam about it in August, and he
seemed to like it quite well.<br>
<br>
It realy is a very early draft, and you should be familiar with SKOS
for a full understanding.<br>
May be the samples are quite expressive by themselves, anyway.<br>
<br>
Thomas<br>
<br>
<br>
Am 15.11.2010 23:18, schrieb Peter DeVries:
<blockquote
cite="mid:AANLkTi=-nXVqG=M8wZkaCqs7a5xJsMiGGXH4=H_Ggf1K@mail.gmail.com"
type="cite">
<meta charset="utf-8">
<span class="Apple-style-span" style="font-family:
arial,sans-serif; font-size: 13px; border-collapse: collapse;">
<div><span class="Apple-style-span" style="font-family:
arial,sans-serif; font-size: 13px; border-collapse:
collapse;">* I originally replied to Bob's post in tdwg-tag,
not tdwg-content</span></div>
<div><span class="Apple-style-span" style="font-family:
arial,sans-serif; font-size: 13px; border-collapse:
collapse;"><br>
</span></div>
It is interesting that Jonathan Reese sees the semantic web and
the LOD cloud in a different way that Tim Berners-Lee.
<div>
<br>
</div>
<div>The issue with LOD semantics is being worked out on the
public-lod list.</div>
<div><br>
</div>
<div>With the exception of some of the LOD services that do
inferencing on cloud data, all inferencing is currently done
on one machine with all the relevant data loaded.</div>
<div><br>
</div>
<div>If you don't like SKOS or some other problematic ontology
entailment you can simply:</div>
<div><br>
</div>
<div>1) Use a modified version of SKOS for your own inferencing.</div>
<div><br>
</div>
<div>Also it would be interesting to see some real world
inferencing using a data set markup in the current DarwinCore
that demonstrates:</div>
<div><br>
</div>
<div>1) That it works</div>
<div>2) That it works in a useful way</div>
<div><br>
</div>
<div>So in addition to failing to work within the standards of
the larger informatics community TDWG*, is failing to
demonstrate that it has a working, useful standard.</div>
<div><br>
</div>
<div>Pointing out potential problems with SKOS etc. does not
demonstrate that you have anything better.</div>
<div><br>
</div>
<div>If the opinions of the real experts in the semantic web
community matter then you might want to consider what they
think of my work.</div>
<div><br>
</div>
<div>Respectfully,</div>
<div><br>
</div>
<div>- Pete</div>
<div><br>
</div>
<div>* It is welcome news to me that TDWG is now going to follow
the advice of the semantic web community</div>
<div><br>
</div>
</span><br>
<div class="gmail_quote">On Mon, Nov 15, 2010 at 3:24 PM, Bob
Morris <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:morris.bob@gmail.com">morris.bob@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
I sent this to tdwg-tag instead of this more appropriate list.
My<br>
apologies to those who see it twice, along with any replies to
it.<br>
<div>
<div class="h5"><br>
Jonathan Reese, an employee of the Science Commons and
TDWG member<br>
(and who knows way more about semantic web than I do)
recently sent me<br>
this. I copy it here with his permission. Each of the
paragraphs seems<br>
to me to be germane in different ways to the discussions
about what<br>
should be an Individual. For those not deep into RDF, for
the word<br>
"axiom", you could loosely understand "rule", although
that term also<br>
has technical meaning that is sometimes a little
different. Jonathan<br>
raises an important use case in the second paragraph,
which is data<br>
quality control. That's a topic of interest to many, but
especially<br>
those following the new Annotation Interest Group.
Originally, this<br>
was part of a discussion we had about my favorite hobby
horse,<br>
rdfs:domain. He is not on my side. When people who know
more than I<br>
do about something are skeptical of my arguments about it,
I usually<br>
suspend disbelief and temporarily adopt their position.<br>
<br>
Jonathan's first point is pretty much what Paul Murray
observed<br>
yesterday in response to a question of Kevin Richards.<br>
<br>
<br>
"(a) subclassing is the way in RDFS or OWL you would
connect the more<br>
specific to the less specific, so that you can apply
general theorems<br>
to a more specific entity. That is, a well-documented
data set would<br>
be rendered using classes and properties that were very
specific so as<br>
to not lose information, and then could be merged with a<br>
badly-documented data set by relaxing to more general
classes and<br>
properties using subclass and subproperty knowledge.<br>
<br>
(b) axioms (i.e. specificity) are valuable not only for
expressing<br>
operational and inferential semantics, but also for
"sanity checking"<br>
e.g. consistency, satisfiability, Clark/Parsia integrity
checks (<br>
<a moz-do-not-send="true"
href="http://clarkparsia.com/pellet/icv/"
target="_blank">http://clarkparsia.com/pellet/icv/</a>
), and similar. Being able to<br>
detect ill-formed inputs is incredibly valuable.<br>
<br>
People talk past one another because there are many
distinct use cases<br>
for RDF and assumptions are rarely surfaced. For L(O)D,
you're<br>
interested in making lots of links with little effort.
Semantics is<br>
the enemy because it drives up costs. For semantic web, on
the other<br>
hand, you're interested in semantics, i.e. understanding
and<br>
documenting the import of what's asserted and making a
best effort to<br>
only assert things that are true, even in the presence of
open world<br>
assumption and data set extensibility. Semantics is
expensive because<br>
it requires real thought and often a lot of reverse
engineering.<br>
People coming from these two places will never be able to
get along."<br>
---Jonathan Rees in email to Bob Morris<br>
================<br>
<br>
<br>
Bob Morris<br>
<br>
--<br>
<br>
--<br>
Robert A. Morris<br>
Emeritus Professor of Computer Science<br>
UMASS-Boston<br>
100 Morrissey Blvd<br>
Boston, MA 02125-3390<br>
Associate, Harvard University Herbaria<br>
email: <a moz-do-not-send="true"
href="mailto:morris.bob@gmail.com">morris.bob@gmail.com</a><br>
web: <a moz-do-not-send="true"
href="http://bdei.cs.umb.edu/" target="_blank">http://bdei.cs.umb.edu/</a><br>
web: <a moz-do-not-send="true"
href="http://etaxonomy.org/mw/FilteredPush"
target="_blank">http://etaxonomy.org/mw/FilteredPush</a><br>
<a moz-do-not-send="true"
href="http://www.cs.umb.edu/%7Eram" target="_blank">http://www.cs.umb.edu/~ram</a><br>
phone (+1) 857 222 7992 (mobile)<br>
_______________________________________________<br>
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</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
---------------------------------------------------------------<br>
Pete DeVries<br>
Department of Entomology<br>
University of Wisconsin - Madison<br>
445 Russell Laboratories<br>
1630 Linden Drive<br>
Madison, WI 53706<br>
<a moz-do-not-send="true" href="http://www.taxonconcept.org/"
target="_blank">TaxonConcept Knowledge Base</a> / <a
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target="_blank">GeoSpecies Knowledge Base</a><br>
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target="_blank">About the GeoSpecies Knowledge Base</a><br>
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</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Thomas Bandholtz, <a class="moz-txt-link-abbreviated" href="mailto:thomas.bandholtz@innoq.com">thomas.bandholtz@innoq.com</a>, <a class="moz-txt-link-freetext" href="http://www.innoq.com">http://www.innoq.com</a>
innoQ Deutschland GmbH, Halskestr. 17, D-40880 Ratingen, Germany
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