# Example 83  IF-THEN pattern example
# https://book.validatingrdf.com/bookHtml010.html#sec107

PREFIX :       <http://example.org/>
PREFIX schema: <http://schema.org/>
PREFIX xsd:    <http://www.w3.org/2001/XMLSchema#>

:Product { schema:productID . } AND
 NOT { a [ schema:Vehicle ] }
 OR { schema:vehicleEngine . ;
      schema:fuelType .
 }