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Temporal queries—Allen and ISO operators
08 February 2015 05:17 PM


Allen and ISO operators are comparison operators that can be used in temporal queries.


Both operator sets are used to represent relations between two intervals.  ISO operators are more general and usually can be represented by a combination of Allen operators.  For example: iso_succeeds = aln_met_by || aln_after.

Period Comparison Operators are discussed in more detail in Searching Temporal Documents.


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