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From Erik Hatcher <>
Subject Re: Another way to handle large numeric range queries
Date Thu, 10 Jun 2004 19:12:34 GMT

On Jun 9, 2004, at 1:05 PM, Don Gilbert wrote:
>> I'm particularly interested in the XPath stuff I saw in LGQueryParser.
>    * xpathFieldParse
>    'xpath' parser: param allfields[], with query or field[] possibly
>     having wild-card notation:   *.start  annotation.*.text
>     allowing '/' and '.' field separator
> This is an *unfinished* attempt to support xpath style queries with
> wild-cards or parts when you have indexed XML data, such as
>   query: /annotation/*/text:term
> I had to put this aside when I saw the problem of pulling the xpath
> fields from a query string would take a fair amount of thought and 
> code.

Keep us posted if/when you return to this.  I would love to see XPath 
query capability on "hierarchical" content indexed in Lucene.  Jakarta 
Slide, for example, is starting to build in Lucene indexing capability 
- although I don't think they are doing anything with XPath query 
expressions yet.

Anyone doing anything similar?  Implementation ideas?


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