[Developers] film character migration announcement

[Alexander Marks]

Attention developers who use the Freebase film schema!

We've completed a migration to a better representation of film performances that replaces "/film/performance/part" (a text string) with "/film/performance/character" (a film character). For now, "part" will stick around for compatibility with existing applications, but we encourage you to make the switch where relevant in your applications as it is now considered deprecated in favor of "character". We've also introduced a distinction between "actors" and "personal appearances", the latter of which should be used for documentary-like appearances (interviews, non-fictional narration, etc.) Let me know if you encounter any problems.

Thanks!

Al