This query page consists of a form in which you can enter values of attributes of the desired object or objects. The figure below is an example of a query page for restaurants. On the left are the names of various attributes of a restaurant, viz. Once you have a query page, you can fill in values for the attributes. This is done in different ways for different attributes.
Some attributes offer menus, e.g. city and cuisine in the query page shown above.
You may select values from menus or fill in values for type-in fields to provide information about the items you are seeking. Multiple selections in a menu are interpreted as alternatives. For example, if you click both San Francisco and Palo Alto, the system assumes you are looking for restaurants in either San Francisco or Palo Alto. You need not make an entry for every attribute. If you do not specify anything, the system assumes you do not care what value or values that attribute has.