This class represents a query performed on uppong the metainformation of
MyPersonalizer.
A query is defined by providing an specification of the result of the query
and a specification of the result ordering.
These specifications are expressed as Step s, each of which
represent a MetaInformation object. The first step defines the root of
the query, and must be a reference to a MetaService .
Following steps reference MetaProperty objects, either
real (defined with the MetaService ) or virtual
(specified externally as bridges between different
MetaService s' properties).
The return specification and the ordering specification must have, at least,
the root step in common, and must have the same cardinality.
author: Abel Muinho since: 1.0 |