Use of 'Historical' for Lifecycle Mgt of Southbeach diagrams

Southbeach Notation supports the idea of an element being 'historical', for example, a risk we no longer face, a goal we no longer need to achieve, a useful function that is no longer needed, etc. Historical is shown in a Southbeach diagram using a cross. This can be applied to any object type. Consulting firms and individual consultants use this to manage the lifecycle of a model, for example, things done, things yet to do, etc. See image below.

Synonyms for 'historical' include: in the past, no longer exists, former, prior, retired, obsolete, strike-out, old news, noncurrent, not in play, completed, concluded, ended, terminated, defunct, dead, extinct, heritage, missing, lost ...