On Jun 27, 2006, at 4:46 PM, Jesus Cea wrote:

> In durus.btree code, there is a class variable called "root_is"that is
> not ever use in the entire Durus codebase. :-??

The code in QP follows a pattern of using class attribute foo_is to
describe the set of values that instances may have
on the foo attribute.  QP has a tool called qpcensus that goes through
every stored instance and verifies the attributes against these
"type" specifications.  BTree instances, and other persistent
instances are checked the same way.

Besides verifying every attribute of every instance, the qpcensus tool
gives a count and a size range for each class.