| http://www.w3.org/ns/prov#value | - quest relates, where when a requestor places a request with the system, the indicator means 30 associated with the stock item to which the request relates is set to a first state indicating that at least one request associated with the stock item has not been attended to, and when all requests associated with the stock item have been attended to, the indicator means 30 associated with the stock it
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