Wish: Dependent elements should inherit IsExternal attribute value

[andydandy74]

There are a number of dependent elements that would benefit from inheriting their IsExternal attribute value from their respective parent / host:

• Stringers of assembled stairs
• Stair-hosted railings
• ~~Curtain wall panels~~
• ~~Curtain wall mullions~~

All of these report their IsExternal values as False, regardless of the Function parameter value of their respective host / parent element.

Tested in 22.4

Expected behaviour

The IsExternal property value should be inherited from the Function parameter of the host / parent element if no override (see below) is present.

Workaround

(Yes, this works as expected, but it's a nuisance and users keep forgetting...)

• Create distinct interior / exterior railing types
• Override using IsExternal[Type] shared parameter

[andydandy74]

This looks fixed for curtain wall mullions and curtain wall panels in 23.2.3, but not for the other element types (stringers of assembled stairs and stair-hosted railings) mentioned above.