Coherence is the consistency of the rules applied in the ontology so that software
can carry out the reasoning contained within the ontology. For subclasses such as
species, while this is set by the common biological name used for the timber there
may be an inconsistency in how people refer to the timber either by its common
name, for example, Slash Pine or its botanical name Pinus elliottii. A reasoning tool
may have to be used to map from the common name to the botanical name.
Extendibility is making allowance for an extension of the ontology at some time in
the future, this involves eliminating redundancy and trying to isolate future areas
of variability, for instance Price and Discount are areas where there is potential
for future variability. Although Price and Discount are both used in calculating the
Blake and Pease
Copyright ?© 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission
of Idea Group Inc. is prohibited.
price of a piece of timber, by separating the entities from each other, flexibility is
introduced.
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