[crm-sig] Re:TOPOLOGY

[martin]

Dear All,

Here a proposal to model spatiotemporal relationships:

All temporal relationships between Temporal Entities are defined
through the relationships of their associated time-spans via
Allen operators:
before 
after
equal
meets
met_by
overlaps
overlapped_by
during
contains
starts

Definitions see e.g. 
Martin Doerr & Anthi Yiortsou, 
  Implementing a Temporal Datatype, 
  Technical Report FORTH-ICS/TR-236, 16 pages, November 1998. 
  Available: compressed ps file (49 KB). http://www.ics.forth.gr/proj/isst/Publications/paperlink/implementing_a_temporal_datatype.ps.gz

For spatial relationships:

Place
    borders with: Place
    overlaps with: Place

For spatiotemporal relationships:

Period
    overlaps with: Period.
    falls within : Period (existing)

A scope note must distinguish between the part-of
relationship of Period (consists of) and the Spatiotemporal!!! "falls within"

I argue that these are enough on a metadata level, and can support
complex reasoning already.

best,

Martin

-- 

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 Dr. Martin Doerr              |  Vox:+30(81)391625          |
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 Project Leader SIS            |  Email: martin at ics.forth.gr |
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               Centre for Cultural Informatics               |
               Information Systems Laboratory                |
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