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of Idea Group Inc. is prohibited.
On July 1, 2005 the new TShirt subcategory is inserted under the AdultClothes
category. The GEM graph after this insertion is reported in Figure 6. The dashed
region contains the new subcategory.
As in the previous case, the new subcategory is represented by means of a new complex
node. The valid time interval of the new objects (nodes/edges) is [01/07/05,now].
Figure 6. Adding a new subcategory
$10
X1
$20
X2
$25
$50
Y1
2 2 Combi & Oliboni
Copyright ?© 2007, Idea Group Inc.
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