Cascading Prompts or Nested Prompts
As name suggests they are nested prompts, one prompt after another or i can also say series of prompts which will narrow the end user selection. Prompt values are dependent on previous prompt value (user selected) and only the last value is used in query.
For example: Let’s say we have heirarchy – Country -> State -> City and you want user to select city based of country and state prompt then its time to use cascade prompts.
Robert Metzker wrote awesome article on “Creating Cascading Prompts in a Universe”. He has explained the steps (including images) involved Cascading Prompts for the Island Resort Marketing.
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