In particular,
data in the graph represent a catalogue composed by two categories: Clothes and
SportProduct. The complex node representing the catalogue is the root of the graph
and has as label its name Catalogue and its valid time [01/01/05,now]. The valid
interval [01/01/05,now] represents the fact that the catalogue is valid from January
1, 2005 until now. The Clothes and SportProduct categories are also represent by
means of complex nodes with the same valid time intervals.
The former category has two products with their codes and prices, while the latter
one is empty. In particular, the products included in the Clothes category are represented
by means of two complex nodes with label Product and valid time interval
[01/01/05,now]. The first product has a code equal to ???X1??? and a price equal to
???$10.??? Both properties are represented as simple nodes. Each simple node has as
label the name (Code/Price), and the valid time interval ([01/01/2005]), and the
value of the property (X1/$10). The second product is structured as the first one,
and represents a product having code equal to ???X2??? and a price equal to ???$20.???
Each complex node is related to its children (complex or simple nodes) by means
of edges having label composed by the name of the relation and the valid time
of the relation itself. For example the complex node Catalogue is related to the
category Clothes by means the edge with name Category and valid time interval
[01/01/2005,now].
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