[XML-SIG] SAX and DTDs

[Uche Ogbuji]

On Thu, 2005-08-04 at 12:39 +0300, Alin Dobre wrote:
>   Hey list,
> 
> I have a python script that does a simple parsing of a XML document
> using SAX. The problem is that I cannot get to validate the XML using an
> external DTD file.
> 
> ------------
> #!/bin/env python
> import sys
> from xml.sax import saxlib, saxexts
> class mySaxDH(saxlib.HandlerBase):
>   def startDocument(self):
>     print 'Document start'
> handler = manSaxDH(sys.stdout)
> parser = saxexts.make_parser()
> parser.setDocumentHandler(handler)
> inFile = file(sys.argv[1], 'r')
> parser.parseFile(inFile)
> inFile.close()
> ------------
> <?xml version="1.0"?>
> <!DOCTYPE man SYSTEM "my.dtd">
> <tag>data</tag>
> ------------
> 
> For the examples shown above, I want to validate the xml stream against
> the my.dtd file. Any idea how to do this using SAX?

Use a validating parser.  e.g.

saxexts.XMLValParserFactory.make_parser()

See example in listings 5 & 6 of

http://www.xml.com/pub/a/2004/11/24/py-xml.html?page=2


-- 
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Use CSS to display XML, part 2 - http://www-128.ibm.com/developerworks/edu/x-dw-x-xmlcss2-i.html
XML Output with 4Suite & Amara - http://www.xml.com/pub/a/2005/04/20/py-xml.html
Use XSLT to prepare XML for import into OpenOffice Calc - http://www.ibm.com/developerworks/xml/library/x-oocalc/
Schema standardization for top-down semantic transparency - http://www-128.ibm.com/developerworks/xml/library/x-think31.html