It seems to me that, given that much data, you'd be better off creating a
separate page for each head of state... especially since the current n-ary
relations solution doesn't support enumerations, which you want (since
there's nowhere to specify the set of allowed values). If you created a
separate page for each head of state, you could easily create an SMW query
to display them all together and sort on each property.
On Jan 14, 2008 10:39 AM, Temlakos <temlakos@...> wrote:
> My question below:
> S Page wrote:
> > Andreas Wombacher wrote:
> >> I just installed the version 1.0 of the SMW. I saw in the code that
> >> there are new data types like for example the nary data type.
> >> Can you please provide a wiki text example how to make use of this data
> >> type in defining a property and an ask statement on how to retrieve it.
> > http://ontoworld.org/wiki/Property:Employment
> > An ask statement for an n-ary property is much the same as any other
> > property; I put one on http://ontoworld.org/wiki/N-ary_relations
> > I don't know of any way to control the appearance
> > property1 (prop2, prop3, ...)
> > To users, N-ary isn't a new data type, it's just saying a property's
> > type is a collection of datatypes.
> > In general a datatype's documentation is on its type page on
> > semantic-mediawiki.org, e.g.
> > http://semantic-mediawiki.org/index.php/Type:Number
> > --
> > =S Page
> Excellent, and I've already documented that in the wiki that I
> But: how does a query /sort/ the values of an n-ary relationship? Do all
> n-ary properties sort on the first value? I can think of several cases
> in which I might want to sort on the second or third. If, for example, I
> wanted to build a list of heads-of-state, then I would declare an n-ary
> property like this: [[has type::date; date; date;date]] (or use the
> "historical date" property that I developed). Then I would annotate each
> head-of-state like this: [[milestones::<born>;<assumed office>;<left
> office>;<died>]]. I could even declare a massive "milestones" property
> with as many dates as I would need, each one having a specific meaning,
> like: born, flourit,assumed office,left office,how left,died as [[has
> type::date;date;date;date;string;date]] (The "how left" might have the
> allowed values "failed of re-election", "term-limited", "declined to
> seek re-election", "resigned", "removed", "died", "assassinated")
> But then if I ran an inline query to produce a table, I might not want
> to sort those heads-of-state by the years in which they were /born/, but
> rather the years in which they /assumed office/. Therefore I would need
> to sort on the second member of the collection, not the first.
> I might also want to run a query on all US Presidents and pick out the
> eight who died in office, or specifically the four who were
> assassinated--and I'd like to do it by picking out the appropriate
> values in the collection.
> Can I do that? If so, how? If not, I hereby request that the developers
> add that as a feature. That kind of flexibility would allow one to do
> without having individual properties for individual kinds of dates, and
> make semantic annotation far easier than it is today.
> Terry A. Hurlbut
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