| http://www.w3.org/ns/prov#value | - As illustrated in FIG. 12, tracking changes in business rules in this situation may be implemented in object-oriented programming by using a data structure such as a dictionary in the invoking component (???R&D Center???221), and by inserting a ???component set??? object 222 between the invoking component 221 and the two valid time period components 223 a and 223 b.
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