Questions regarding Lucene query syntax

The query syntax reference page talks about the NOT and the - operators, but it wasn't clear to me what exactly the difference is between them. Could someone tell me briefly what that difference might be or point me at some further docs that describe it? Is there a way to require a portion of a

Re: Ideas for a relevance score that could be considered stable across multiple searches with the same query structure?

On 4/11/07, Chris Hostetter <[EMAIL PROTECTED]> wrote: A custom Similaity class with simplified tf, idf, and queryNorm functions might also help you get scores from the Explain method that are more easily manageable since you'll have predictible query structures hard coded into your application