module Vips

    # The type of relational operation to perform on an image. See 
    # {Image#relational}.
    #
    # * ':more' more than
    # * ':less' less than
    # * ':moreeq' more than or equal to
    # * ':lesseq' less than or equal to
    # * ':equal' equal to
    # * ':noteq' not equal to

    class OperationRelational < Symbol
    end
end