| http://www.w3.org/ns/prov#value | - time (non-rival) and producers can not stop non-paying consumers from getting and using their own copies (non-excludable)), and they are experience goods" (you can not assess their value to you until you have experienced them e.g. heard a song or seen a movie, so you are not willing to pay before trying it - "sampling or free trials or tasters - yet, suppliers rarely provide adequate samples).As di
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