8 Sep
2008
8 Sep
'08
5:39 p.m.
Hey Marco
Marco K. wrote:
<snip>
Yes. I completely Agree, that would be consistent with the OWL-Way of
referring to Data or Object Properties. That would allow to put axioms
on the Property Page like "P1 owl:sameAs P2" or whatever.
Yes, indeed it
would. The only Thing is that this would not be always
easy to understand for the average user (who will use the WYSWIG-Editor)
But generally the above Example would translate to:
Somewhere on a London Xwiki page:
[[UK>United Kingdom>predicate="capital_of"]]
(correct ?)
I highly appreciate the support for semantic links in xwiki. Some
months
ago, I developed an experimental plugin for this. (With the help of the
Graphviz-plugin, I can visualize the relations between pages.) So I have
some made experience, I'd like to share with you:
1.) The semantic links should be persistent, so that they can be queried
fast,
e.g. for lists as in:
http://semantic-mediawiki.org/wiki/Property:Located_in
http://semantic-mediawiki.org/wiki/Special:Properties
Particularly, it should be possible to find all "subject pages" of an
object page (as this is done with persistent backlinks in XWiki).
2.) The predicates / properties should have their own document
so that you can describe the property or define some "meta properties"
there, for example.
3.) The value of the predicate should IMHO be also a "fully working" link
so that you can navigate to the predicate / property itself. The
semantic link should be visible in either way in the generated HTML (at
least in the tooltip?). Eventually, the predicate-links should also be
stored as backlinks?
The full link would then point to the Property page, or to some property
of a another Ontology. But in the latter case the predicate-Links cannot
be stored as backlinks.
I think it should be possible to write a plugin which would also
attach/embed the rdf representation of the Links into the retrieved html
page, so that it can be used by foreign systems/programs. This would
also apply to the Notation in Wikimodel here:
http://code.google.com/p/wikimodel/wiki/AdvancedStructuralElements
4.) Page Renaming of properties should be possible, so that the semantic
links are updated with the new predicate.
For my plugin, I used the following syntax - inspired by Semantic
MediaWiki [[Space.Predicate::Space.Object]]:
[[Predicat Name>Space.Predicate][Object Name>Space.Object]]
or short
[[Predicate][Object]]
It had the pragmactic advantage with the old xwiki syntax that the
"normal" link parsing and the functions like "Page
renaming/Refactoring"
work furthermore. From the implementation perspective, I only needed to
write a radeox filter that does the following:
1) Read the semantic link and store it in a persistent store
2) Convert [[Predicat Name>Space.Predicate][Object Name>Space.Object]] to
[Object Name>Space.Object].
I configured this filter before the XWikiLinkFilter.
My 2 cents.
It is definitely good to hear that other have successfully used xwiki as
"semantic enriched"-Wiki and it is thus been tested somewhat. Also I
think it is good in terms of Experience.
nice greetings
Jonas