| http://www.w3.org/ns/prov#value | - __________________________________________________________________________PSet set of all features that are being alignedQSet set of all features that are being aligned tod' hP' {}Q' {}for each feature P in PSet. for each feature Q in QSet. . if P is a vertex. . . p world-space coordinates of P. . if P is an edge. . . p0 world-space coordinates of one endpoint
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