| http://www.w3.org/ns/prov#value | - wherein X is selected from the group consisting of C(R???R???), O, S, Se, NR???, and Si(R???R???), and wherein R??? and R??? are independently selected from the group consisting of a hydrocarbon group, a heteroatom-containing group, a halogen and a mixture thereof; and Y is a carbon atom or a nitrogen atom.
|
