Returns TRUE if concept C1 is subconcept of C2 or if set C1 is subset of C2.
Details
Both C1 and C2 must be of the same class.
Examples
# Build two sparse setsS<-Set$new(attributes =c("A", "B", "C"))S$assign(A =1)T<-Set$new(attributes =c("A", "B", "C"))T$assign(A =1, B =1)# Test whether S is subset of TS%<=%T#> [1] TRUE