FieldRef

Contains the field reference information. Following is the list of other fields and attributes for the field ref.

• FieldName. Unique identifier for the field within its level

• levelType. This is an attribute of the FieldRef. This represents the model level the field corresponds to, such as "ZBKS.Book" or "Site". If the field does not correspond to any level, then this should be set to "Undefined".

• category. This is an attribute of the FieldRef. This is largely deprecated, so when creating CustomFilterFields and CustomRetrievalFields, you can generally use just "PDF" (Pre-Defined Field)

• ModelLinkTargetLevelType. If the field is a model link, then this attribute will contain its target model level type. FieldCategory should always be MODEL_LINK when this is non-null.