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- To: Bob Foster <bob@objfac.com>
- Subject: Re: [xml-dev] SAX and parallel processing
- From: Uche Ogbuji <Uche.Ogbuji@fourthought.com>
- Date: Sat, 01 Jan 2005 13:33:14 -0700
- Cc: Alan Gutierrez <alan-xml-dev@engrm.com>,David Megginson <david.megginson@gmail.com>, xml-dev@lists.xml.org
- In-reply-to: <41D5F0D0.60501@objfac.com>
- Organization: Fourthought, Inc.
- References: <830178CE7378FC40BC6F1DDADCFDD1D10276723C@RED-MSG-31.redmond.corp.microsoft.com> <200412302356.29709.miles@milessabin.com> <1104455192.3038.5.camel@borgia> <200412310131.52268.miles@milessabin.com> <1104460276.3038.23.camel@borgia> <41D4CC8C.1080200@objfac.com> <1104465543.3038.28.camel@borgia> <20041231165744.GA20756@maribor.izzy.net> <75cb920c04123110151af471f9@mail.gmail.com> <41D5DAD0.7000909@objfac.com> <20041231234449.GA21911@maribor.izzy.net> <41D5F0D0.60501@objfac.com>
On Fri, 2004-12-31 at 16:37 -0800, Bob Foster wrote:
> Right. In order to process a SAX stream in parallel you have to copy the
> data in the stream, you can't just "forward" the events. You also have
> to instantiate a context for each event, including at least the
> namespaces in scope, the Location info. I didn't mean to imply this
> would be excessively expensive, just not as lightweight as serially
> processed SAX.
Maybe this is where my perspective, so surprising to so many here, comes
from. In Python SAX, all event objects are dissociated from the driver.
I must say I think it somewhat vindicates the Python approach that it so
easily extends the framework to advanced implementation strategies.
I had forgotten this about the original SAX, and I must say it makes for
a lot more of an "assembler-level" view than SAX as I'm used to using
it.
--
Uche Ogbuji Fourthought, Inc.
http://uche.ogbuji.net http://4Suite.org http://fourthought.com
Use CSS to display XML - http://www.ibm.com/developerworks/edu/x-dw-x-xmlcss-i.html
Full XML Indexes with Gnosis - http://www.xml.com/pub/a/2004/12/08/py-xml.html
Be humble, not imperial (in design) - http://www.adtmag.com/article.asp?id=10286
UBL 1.0 - http://www-106.ibm.com/developerworks/xml/library/x-think28.html
Use Universal Feed Parser to tame RSS - http://www.ibm.com/developerworks/xml/library/x-tipufp.html
Default and error handling in XSLT lookup tables - http://www.ibm.com/developerworks/xml/library/x-tiplook.html
A survey of XML standards - http://www-106.ibm.com/developerworks/xml/library/x-stand4/
The State of Python-XML in 2004 - http://www.xml.com/pub/a/2004/10/13/py-xml.html
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