hui wrote:
> If the document id is going to be changed, is it possible to define an
> interface so the user could provide other implementation to replace the
> default one? For example, the document unique timestamp or other fields as
> long as they are long could be used.

I don't think that would be a good idea.  Lucene's index format requires 
document ids to increase as documents are added, and things are *much* 
more efficient when the numbering is dense.

> In this way, we can easily get another
> sorting option rather than the default score sorting. Still not sure whether
> it is a good idea or not though.

There is good result sorting support in the latest CVS that will be in 1.4.

Doug

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