Hi denny
I had a second look at the documentation and I now understand how Semantic
MediaWiki can help us.
Assume map features were described by three attributes: a key, a value and a
description, like
{MapFeature key="foo" value="bar" description="desc"}
Then we would create a Wiki page [[Tag:foo=bar]] (as we do today):
----------- beginwiki of [[Tag:foo=bar]]
bla bla bla
<!-- the properties of Semantic MediaWiki -->
[[key::foo]]
[[value::bar]]
[[description::desc]]
----------- endwiki
On the [[Map Features]] page we could ask for this data (the following example
automatically creates a table,
we have full control over rendering using wiki templates, if we want to)
----------- #beginwiki of [[Map Features]]
{{#ask: [[Tag:foo=bar]]
| ?key = Key
| ?value = Value
| ?description = Description
}}
----------- #endwiki
On yet another page we could include information about the map feature:
----------- #beginwiki of [[Yet another page]]
The map feature [[Tag:foo=bar]] is described as follows:
* Key: {{#show: Tag:foo=bar | ?key}}
* Value: {{#show: Tag:foo=bar | ?value}}
* Description: {{#show: Tag:foo=bar | ?description}}
----------- #endwiki
I'd like to use SemanticWiki for the OSM wiki. This will bring us a step
further to managing map feature data.
I'd like to have a kind of sandbox to work on this. Could somebody provide an
installation of MediaWiki including SemanticWiki and a copy of the current OSM
Wiki content on a test server?
-- Karl
-----Ursprüngliche Nachricht-----
Von: Denny Vrandecic [mailto:d...@aifb.uni-karlsruhe.de]
Gesendet: Mittwoch, 24. Dezember 2008 10:07
An: talk@openstreetmap.org; karl.guggisb...@guggis.ch
Betreff: [OSM-talk] OSM-WIKI: reducing redundancy, less redundant and
standardized data exchange
(Karl, since the list is probably closed for outside postings, can you please
forward this answer to the list?)
I stumbled on this thread via Google Alert, so excuse me for not being much
knowledgeable about the OpenStreetMaps wiki (I'm a big fan of OSM,
though!) -- but I know a little bit about Semantic MediaWiki.
So one of the major ideas is indeed to be able to declare a piece of
information on one page, and then reuse the data in other places, especially
summary sites.
Example: on the "Statue of Liberty" page you would say "Tourist
attraction=major" and "located in=New York, NY" and on then, in other places,
you could create queries to summarize such data from the wiki, i.e.
List of all major tourist attractions:
{{#ask:[[Torist attraction::Major]]}}
or
List of all tourist attractions in New York, NY:
{{#ask:[[Tourist attraction::+]] [[located in::New York, NY]]}} etc.
If you want, keep me in the loop for this thread, and I will answer question.
I'd be very happy to see the OSM wiki use SMW, if it makes sense.
Cheers,
denny
Original message:
Hi there,
In [2] we see that there are partially redundante declarations of map features
(descriptions of keys or key/value-pairs for tagging OSM
primitives) in the wiki. The major reason for redundant is, that they appear
both on individual pages (like [[Key:heighway]] or [[Tag:highway=primary]]) and
on summary pages (like [[Map Features]]). So far we didn't come up with an
approach to *declare* a map feature only once on the Wiki (i.e. by
instantiating a suitable template) and to *use* this declaration both in
indvidual pages and in summary pages.
I don't see yet how Semantic MediaWiki could help use here because the limited
templating approach seems to remain unchanged. An example on how Semantic
MediaWiki could help to declare, say, the data for the key/value-pari
highway=primary would be very appreciated. Perhaps on the talk page of [2]?
-- Karl
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