| http://www.w3.org/ns/prov#value | - ertain types of tasks, obtain an academic degree, (iv) reserving tasks from job owners, (v) notifying workers when tasks may become available in high quantity, (vi) matching jobs or tasks preferences of workers, (vii) providing notification services for jobs preferred by a worker, (viii) allowing bidding of time, fee or other criteria to receive a commitment from a job owner to give a large quanti
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