| http://www.w3.org/ns/prov#value | - or weeks.There was a 'persistent' knocking on the door.There have been 'persistent' rumours for years.Pine cones have 'persistent' scales.Once written to a disk file the data becomes 'persistent' and it will still be there tomorrow when we run the next program.This way transient value becomes 'persistent'.author=Bruce Clifford title=Effective url=http://books.google.com/books?id=_sI0V0w5124C&pg=PA
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