??? The special value ???now???
Figure 1. A GEM graph related to restaurant information
Red Horse
Big Street, 15 - New York
Summer
$ 25
$ 30
New York
Small Street, 20
Big Home
The Beach
[01/05/05,now]>
284 Combi & Oliboni
Copyright ?© 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of
Idea Group Inc. is prohibited.
means that the considered node (edge) is currently valid (and will remain valid until
a suitable update happens). The old price is represented in the GEM graph, but its
valid time interval starts from ???01/06/05??? and ends ???14/06/05.???
Temporal.
Pages:
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524