Simple description of SpecPars in the DetectorDescription sub-system

SpecPars are elements in the DDD XML files that provide information to be attached to a node in the tree produced by traversing the DDD graph.

The following is cut-and-past from the DDD pages describing the syntax of the selection criteria of a such parameters.

SelectionString := SelectionStep+ ;
SelectionStep := NoCopyNumberParts | CopyNumberParts ;
NoCopyNumberParts := NavigationalElement string ;
NavigationalElement := '//' | '/' ;
CopyNumberParts := NoCopyNumberParts !CopyNumber ;
CopyNumber := '[' integer ']' ;

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