In response to a request received from a client device to view an item, a program determines a category associated with the item and a location associated with a user of the client device. The program also identifies a form based on the category and the location. The form comprises a set of fields. The program then provides a graphical user interface (GUI) that includes the form to the client device. The program also receives, through the GUI, data values for the set of fields from the client device and a request to add the item to a collection of items. The program then identifies a policy based on the category and the location. The program also applies the policy to the data values for the set of fields. The program then sends a notification to the client device indicating a result of the application of the policy.