We want to specify that a “car version” fits into a category of automobiles: it will be an SUV; a sub-compact; a compact; a midsize sedan; a full size sedan; a luxury car; or a truck. Since this list is fairly stable, you do not need to create a new definition type for it. You create a list of “vehicle types”.
LIST "Vehicle Types" { Value "SUV" Value "Sub-Compact" Value "Compact" Value "Midsize Sedan" Value "Fullsize Sedan" Value "Luxury Sedan" Value "Convertible" Value "Truck" } Definition "Car Version" { Property "Car Model" {Key Edit oneOf "Car Model" KEYED BY {"Make":"Brand", Name} RELATE BY "is keyed by"} Property "Brand" {KEY EDIT OneOf "Car Brand" RELATE BY "is keyed by"}Property "Vehicle Type"{EDIT Text List "Vehicle Types" DEFAULT "Midsize Sedan"}}
Where clause continued
Create a new definition of type “SUV Ad Campaign”. In a property of this definition, we want users to be able to select instances of automobiles of a certain type. In other words, you want this property to be filtered to contain only the instances of definitions in the encyclopedia that satisfy the stated condition of 'vehicle type' = 'SUV'. Use the WHERE clause to provide this filtering.