[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: Big XML file

• To: "'xml-dev'" <xml-dev@l...>
• Subject: Re: Big XML file
• From: Petr Cimprich <petr@g...>
• Date: Mon, 30 Jun 2003 17:20:36 +0200
• In-reply-to: <16128.15332.778939.316517@m...>
• References: <019701c33ca7$03299e50$b4fb850a@a...> <3EFC546B.8512E79B@b...> <014d01c33efe$b9392090$b4fb850a@a...> <16128.15332.778939.316517@m...>
• User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4b) Gecko/20030509

David Megginson wrote:

>Miguel A. Robles writes:
>
> > Many thanks for your help. Now, I know I can manage large XML files
> > with SAX and it works fine. The problem now exists when I need to
> > update the content of an element or any of its attributes. I'm not
> > sure, but I think that SAX cannot be used for that purpose.
>
>SAX per se is just a common interface, and cannot do anything.
>However, there are SAX clients (like my own XML-Writer and probably
>many better ones) that take SAX events and generate XML markup from
>them.  So if you take a SAX parser and register a SAX writer as its
>client, you have an XML identity transformation with only a few lines
>of code.
>
>Now, create your own filter to sit between the parser and the writer.
>All your filter has to do is intercept the events it wants to change
>and generate new ones to replace them.  That may be an easy or
>difficult task, depending on the scope of the changes (i.e. renaming
>or splitting a few elements is easy, restructuring a large subtree
>isn't).
>  
>

You can avoid programming of callbacks by using STX, a SAX-based 
transformation language.  The rules to update your data can be then 
given in a form of XSLT-like templates. There are implementations in 
Java and Perl available [http://stx.sourceforge.net/].

Regards,
Petr


-- 
Petr Cimprich
Ginger Alliance
www.gingerall.com

• References:
  • Big XML file
    • From: "Miguel A. Robles" <marobles.sag@m...>
  • Re: Big XML file
    • From: "Chiusano Joseph" <chiusano_joseph@b...>
  • Re: Big XML file
    • From: "Miguel A. Robles" <marobles.sag@m...>
  • Re: Big XML file
    • From: David Megginson <david@m...>

• Prev by Date: Re: Big XML file
• Next by Date: Applications of Analogical Reasoning Systems (WAS RE: XML-based Automation (Was: Zen or Games?))
• Previous by thread: Re: Big XML file
• Next by thread: Fw: Big XML file
• Index(es):
  • Date
  • Thread