How can I change the Relationships default name

Hi Team,

I am trying to change de deafult name os relationships/references.

In a LDM model for default the relationship name is Relationship_1 and I want to change this default  for ParentEntity_nn (nn is a sequencial number like "01", "02" , ...)

I know that probably I can do it in Event hadler Initialize, but is it the better way?

There is other option?

Assertion Template? I don't know how it works.

Best regards.