[Zope] What is PrincipiaSearchSource et al?

[Chris Withers]

Felix Ulrich-Oltean wrote:
> 
> What is the Principia* stuff all about?  I've seen it dotted around
> the Zope code and I'm curious.

Historical names that are still used today. Principia is one of the original 
programs that were meled together to form Zope.

> Also, I'm building a Zope product and wondering if I have to worry
> about defining a PrincipiaSearchSource method or anything else, as
> I've seen it mentioned in the same breath as ZCatalog a few times.

Only if you want it to be indexable.

cheers,

Chris