| http://www.w3.org/ns/prov#value | - FIG. 2 is a schematic illustration showing a second embodiment of the present invention, wherein there is provided a three dimensional orthogonal chart system for visualizing data comprising at least three data sets, wherein one data set is represented as a ribbon propagating along a first axis, the second data set is represented as a curtain propagating along the first axis, and the third data se
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