| http://www.w3.org/ns/prov#value | - The first task group will focus on security barriers that are part of the building structure itself: fixed barriers such as walls, ceilings and floors; openings such as doors, hardware (locks, hinges, etc.), side-light and multi-light vision systems (building fronts, etc.), glazing materials and systems, windows, operable vents, ventilation grilles, duct work security grilles, vehicle doors (basem
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