Re: Time intervals through predicate

Hi Tara,

This is exactly my motivation for wanting to have the predicate here. Then we can accurately account for the relationship between the graph and time, and as you point out model intervals if required.

Alasdair


On 12 June 2015 at 15:56:42, Tara Athan (taraathan@gmail.com<mailto:taraathan@gmail.com>) wrote:

If we truly allow any predicate to be used for "p" in the time-stamped
graph (g, p, t), then we can emulate an interval time stamp through p.
For example, p could come equipped with a duration, with the meaning
that the graph holds during the interval starting at t, with this
duration. The duration could be specified with a query string parameter,
providing a family of predicates, each one corresponding to a particular
duration.

There could be different predicates for the case when t is the start
time, end time or center of the interval. This allows choosing any one
of these characteristics for the primary ordering, while variation in
the duration could lead to a secondary ordering, if a total order of the
stream is desired.

Does this seem reasonable?

Tara

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Alasdair J G Gray
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