[ZODB-Dev] Updated BTree docs

[Chris Withers]

Casey Duncan wrote:
> 
> byValue() returns (value, key) pairs in sorted order by value. ZCatalog uses 
> this to sort "scored" results, such as from text indexes, which start as a 
> mapping of rid->score.

How does this relate to this:
http://mail.zope.org/pipermail/zope-dev/2003-April/019456.html

> I have actually been camping on some optimized code for this. The current 
> implementation is pretty lame. I came up with a new API, keysByValue(), which 
> returns the keys in order by value, which is really all ZCatalog needs.

Does TextIndex use this to help with ranking in search results where more than 
one index is used in the search?

If so, how could it be implemented for ZCTextIndex?

cheers,

Chris