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with value ???$50.??? These simple nodes have time interval [01/04/05,now], as their
ingoing edges.
On June 1, 2005 the Clothes category is replaced by the KidClothes and the Adult-
Clothes categories. The GEM graph after this replacement is reported in Figure 5.
The dashed region contains the new categories.
In particular, the time interval of the replaced Clothes category changes from
[01/01/05,now] to [01/01/05, 31/05/05], and the same for the time interval of the
edge Category between the complex node Catalogue and the complex node Clothes.
The new categories are represented by means of the complex nodes KidClothes and
the AdultClothes with valid time interval [01/06/05,now]. The products included in
Figure 4. Adding a new product
$10
X1
$20
X2
$25
$50
Y1
2 0 Combi & Oliboni
Copyright ?© 2007, Idea Group Inc.
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