Arguments

ename  (ename) the entity to assign the property value

propertyset  (string) the PropertySet name (as Name or Label, case-insensitive);
if the propertyset does not exist yet, it is automatically created under "User" NameSpace, as "visible" and

name  (string) the name of the Property (as Name or Label, case-insensitive) to assign the value for;
if the Property does not exist yet, it is automatically created in the specified PropertySet, as "visible" and "per-instance"

value  (any Lisp value)  the value to be assigned

Return

T or NIL

Example

(bim:pset-set-property ent "MyPropertySet" "MouTag" "abc")  T
(bim:pset-get-property ent "MyPropertySet" "MouTag")  "abc"

Remarks

both PropertySet propertyset and Property name are automatically created (visible, per-instance)
the Property name is case-insensitive;
the PropertySet name/label is case-insensitive;
all PropertyNameSpaces are automatically used to find the specified PropertySet