| http://www.w3.org/ns/prov#value | - It is a system in as much that not only involves contractual matters but also institutions and instruments that support and promulgate what is halal such as Gold dinar, silver dirham, Wadi???ahs (safe keeping institutions), Suqs (open markets), Caravans (open trading institutions), Guilds (Open production institutions), Waqf (welfare institutions), Bai Salam (agricultural trading system), Bait ul
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