7.5 Element Properties

Expressions to reference element properties. These will typically be prefixed with element, e.g. element.property, but any specific element type can be used, e.g. wall.property, if attributes are only required for that type.

Elements usually have multiple properties, but a rule or calculation will be focussed on the value of just one – therefore the name of the target property in enclosed in parentheses should be appended, e.g. element.property(“Manufacturer”).

Property names are only guaranteed to be unique within a single group. If only a name is specified, Quantities will take the first matching property it finds. If there is any doubt about the uniqueness of the name, it can be prefixed with the group name and a double colon, e.g. element.property(“General::Manufacturer”).

Refer to section 4.4.7, How to use properties for more detail.

property

An element property value – the property name must be specified, e.g. element.property(“Manufacturer”) The property name can optionally be prefixed with the group name to guarantee uniqueness, e.g. element.property(“General::Manufacturer”)