Zope's standard CatalogAware class has a number of problems (as of version 2.3.2) which are all fixed by this alternative.

BetterCatalogAware is usable as a base class for ZClasses, and python products.

1. It avoid unnecessary bloat by not unindexing before reindexing
2. It handles virtual hosting, by inheriting from the underdocumented CatalogPathAwareness
3. It can be used as a base class with ObjectManager. Note it must be before ObjectManager in the base class list.