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SHACL Community Group (Post-REC activitities)
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Logical Constraint Components with multiple SHACL lists are underspecified #41

Open bergos opened 9 months ago

bergos commented 9 months ago

The specification isn't clear about what an implementation should do if a shape has multiple lists of logical constraint components of the same type. The following example could be interpreted as

  1. (shapeA || shapeB) && (shapeC || shapeD)
  2. shapeA || shapeB || shapeC || shapeD
ex:shapeRoot a sh:NodeShape;
  sh:or
    (ex:shapeA ex:shapeB),
    (ex:shapeC ex:shapeD).

It looks like most implementations use option 2, but it should be written more clearly in the specification.

HolgerKnublauch commented 9 months ago

All constraints in SHACL eventually get ANDed for execution, i.e. the correct interpretation is 1. The target nodes need be A or B, and then also C or D.