9.3 Relational Operators

Operators that make comparisons between two values, e.g. equality between values with “=”. The result from all of these operators is either true or false.

=	Determines if two values are equal. Applies to all value types, e.g. numbers, text, true/false. A rule that checks that the element type is a wall is: element.type = “Wall” Or a rule that checks for a wall thickness of 200mm is: wall.thickness = 200mm
<>	Determines if two values are not equal. Applies to all value types, e.g. numbers, text, true/false. A rule that checks that the element type is not a wall is: element.type <> “Wall” Or a rule that omits any wall thickness of 200mm is: wall.thickness <> 200mm
>	Determines if one value is greater than the other. A rule for attaching walls higher than 2m is: wall.height > 2
<	Determines if one value is less than the other. A rule for attached slabs less than 250mm thick is: slab.thickness < 250mm
>=	Determines if one value is greater than or equal to the other. A rule for attaching walls at least 2m high is: wall.height >= 2
<=	Determines if one value is less than or equal to the other. A rule for attached slabs no thicker than 250mm is: slab.thickness <= 250mm