A Document Type contains a Cascading Data Set that includes the State, County, and City Keyword Types. State is the parent, or root, Keyword Type in the Cascading Data Set. County is a child to State, and City is a child to County. These Keyword Types appear in the order of their parent/child relationship in the Document Retrieval window:
When retrieving documents, you must select values for Keyword Types in the order of their parent/child relationship. In this example, the drop-down list for the County Keyword Type is empty until a State value has been selected. The drop-down list for the City Keyword Type is empty until a County value has been selected. This is because the three Keyword Types are related to one another, and meant to be used in conjunction with one another.
Child Keyword Values are not automatically corrected after modifying the parent Keyword Value. Using the above example, a user selects a State, County, and City Keyword Value. The user then modifies the State Keyword Value. The selected County and City Keyword Values are not child Keyword Values of the new State Keyword Value. The selected County and City Keyword Values are not cleared from the Keywords panel.