View source for Documentation:Derived settable associations

[[Derived attributes & associations]] are read-only, but you can also have writable associations that update other attributes or links when they are themselves set. Read here [[Derived settable attributes]] about how that works on attributes.
[[File:Derived settable class example.png|none|thumb|531x531px]]

OCL for reading Class2selection
 self.Class2
EAL for the writing Class2Selection
 self.Class2 := vInputParameter;
 self.SelectionLog := self.SelectionLog + DateTime.Now.asString + ': '+ vInputParameter.Name + '\r\n'
The most common use case for this is to execute "extra" code for recalculating other persisted values based on the new value of a change to a link.

Here is the sample model to be loaded into the designer: [[:File:DerivedSettableExample.modlr]]