| http://www.w3.org/ns/prov#value | - The display controller also displays in the property status display area 10 a first description 13 indicating that the property is a value read from the electronic catalog data, a second description 43 indicating that the property is requesting input from the user (see FIG. 14), and a third description 42 (see FIG. 14) indicating that the property is obtained by executing an expression, defined as
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