[AZ]

By "indexing" we might mean the ordering of portions of (say, textual) information (of elements, e.g., a single patent) alphabetically, or according to a time of the portion writing into a common DATA-base, and likewise. However, this ordering is according to criterions having no attitude to that information sense which might be interesting for a customer.

But a DATA-base can be well-ordered according to a hierarchical set of criterions defined by experts in a given problem domain.