A bitemporal worldview



Timeline 1 - sequence of artifacts. Each artifact has a publication time.

Timeline 2 - sequence of changes to an artifact.

Application to Wikipedia

Timeline 1 - new pages are added, the system changes, contributors change.

Timeline 2 - changelog for an article.

Application to play.teod.eu

Timeline 1 - git log.

Timeline 2 - if specific articles are going to undergo thorough changes, a changelog may be embedded.

Example from Eric Raymond

Revision history up top.