IfcLogical representation in XML base

[CBenghi]

We currently don't have an agreement for the expression of IFCLOGICAL constraints.

We are suggesting the use of (true|false|unknown) as options. Any relevant restriction base type should be specified as xs:string.

[CBenghi]

Also check for the following test cases:

• fail-a_logical_unknown_is_considered_false_and_will_not_pass
• fail-attributes_with_a_logical_unknown_always_fail