| http://www.w3.org/ns/prov#value | - efore time expires and given at least 20 seconds to extend the time limit with a simple action (e.g., press the space bar), and authors are allowed to extend the time limit at least ten times; or (d) Real-time Exception: The time limit is a required part of a real-time event (e.g., a collaborative authoring system), and no alternative to the time limit is possible; or (e) Essential Exception: Th
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