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Re: Quick question related to XQuery

• To: Murali Mani <mani@C...>
• Subject: Re: Quick question related to XQuery
• From: Oleg Tkachenko <oleg@t...>
• Date: Thu, 20 Nov 2003 12:02:56 +0200
• Cc: xml-dev@l...
• In-reply-to: <Pine.GSO.4.58.0311191613290.21512@p...>
• Organization: Multiconn Technologies
• References: <004901c3aed2$497f4ab0$650aa8c0@BOBDEV> <Pine.GSO.4.58.0311191613290.21512@p...>
• User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.5) Gecko/20031007

Murali Mani wrote:

> I do not think Saxon is what I am looking for. What I want is I give a
> xpath expression/xquery etc, and some one gives it sax events. I want the
> query processor to operate on this stream of sax events from this point
> on, and give me values that satisfy the path expression/query.

So take a look at "Using XPath Expressions" chapter in Saxon 
documentation at 
http://saxon.sourceforge.net/saxon6.5.3/api-guide.html#Expressions
(or http://saxon.sourceforge.net/saxon7.8/api-guide.html#Expressions for 
Saxon 7.X).
It sounds exactly what are you looking for.

> it says it can rebuild trees etc, which is not really possible in my
> scenario..

Well, rebuilding trees usually implies extensive querying, so usually 
any XSLT processor exposes XPath API too.

> think of it more like your data is continuously streaming in,
> and is "infinitely" large..
Sounds like you don't want to build in-memory tree? Then XPath might be 
not appropriate query language for you, because it operates on tree 
level, hence allows reverse axes etc.
-- 
Oleg Tkachenko
http://www.tkachenko.com/blog
Multiconn Technologies, Israel

• Follow-Ups:
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