PAGC uses a redirection strategy to deal with attributes that may appear in the user address standardization or even in the reference standardization which were not part of the original, unstandardized reference schema.
Consider, for instance, the Statistics Canada schema, which has a "Type" field, which does not distinguish between SUFTYP and PRETYP. If the program sends all values to a SUFTYP attribute, it will fail to match with an address in which the type is standardized as a PRETYP.
The strategy is to redirect a non-schema direction attribute to a schema direction attribute, if one exists. Otherwise it is redirected to the (required to be present) STREET attribute. The same method is used for type attributes. The QUALIF attribute is redirected to the STREET attribute. These attributes do not have associated with them a pair of match/mismatch values ( See Default Matching Weights). They are classified internally as a NO_COMPARISON comparison type and are scored, using a similarity measure, with the weights assigned to the attribute to which they are redirected.