a form al m odel for the specifications of geographic ... - David Sheeren

of each part of the data schema, which object are captured and how ..... Figure 2. Extract of the elementary constraints of the geographical specifications model ...
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Simple constraint

Complex constraint Logical operator : [and | or]

* Nature Constraint

Relationship Constraint

Geometric Constraint

Negation : boolean Nature Criterion : string

Comparison operator : string Mesurable : boolean Threshold : real Geometric criterion : string Metric relationship constraint Metric criterion : string Mesurable : boolean Comparison operator : string Threshold : real

Topological relationship constraint Topological relationship : string

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