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

Re: Processing huge XML files

processing multiple files with omnimark
From: "Michael Kay" <michael.h.kay@n...>

> But really, when you get above 50Mb or so, you need to start looking at
> XML databases. 

Another approach is to use steaming languages such as Perl and OmniMark,
(and, I guess, Python?) especially if you are not updating the data just extracting information.

Of course, you may need to take several passes.  And you may need to
have one pass of the data generate a program to be used for then next
pass, a venerable technique that is often overlooked.  But multiple
passes with streaming languages is the way that many large scale
publishing systems work.  A lot can depend on whether your document
has an order that is amenable to your application: storing metadata
and keys before the data in particular. 

A very typical way of constructing streaming programs on large 
data sets is to do two passes:
  1) Run over the data and extract all information that will be needed for 
    decisions that otherwise require random access or lookahead.
  2) Run over the data and perform the extractions/analysis, using the
    decision points. 

Rick Jelliffe


Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.