I have content type "product" term referenced by Taxonomy "Product category" having terms -Cook tops -Heaters -Chimneys
Now if i flagged nodes associated with term "Cook tops" , after that if i flag node associated with "Heater". I should get a error message.
Actually I am using this flag to show flagged item in BASKET(as done in many shopping site). But i do not want to put a "Cook tops" node with "Heater" nodes.