| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF DRAWINGS The invention can be more fully understood by reading the following detailed description of the preferred embodiments, with reference made to the accompanying drawings, wherein: FIG. 1 is a schematic diagram showing an object-oriented component model of the computer code upgrading system according to the invention; and FIG. 2 is a flow diagram showing the operational
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