== Query, QueryItem ==
A Query is defined for a single MetaClass. The MetaClass is defined by a Referenceproperty (“FILTEROBJECT”)''FILTEROBJECT''. A Query will deliver ContentClasses(instances) of the defined MetaClass.
A Query holds a list of QueryItems. A single QueryItem defines a single filter rule for the evaluation of the result collection:
* OPERATOR
* LOGICALAND
is there a logical AND relation between the given QueryItem and its predecessor (TRUE) or an OR relation (false)
== Relation between Query and Items ==