[XML-SIG] Writing SAX-drivers

[M.-A. Lemburg]

Alexandre Fayolle wrote:
> 
> On Fri, 9 Nov 2001, M.-A. Lemburg wrote:
> 
> > I haven't been able to find any documentation on writing SAX-driver
> > for PyXML -- is there any ? (I've looked at the code in PyXML and
> > the PyXML docs, but the code is undocumented and the docs only
> > mention *using* SAX interface compatible parsers.)
> >
> > Or does PyXML simply use a well-defined standard for drivers
> > which I can lookup on some web-site ?
> >
> > Thanks for any pointers,
> 
> For very simple parsers (parsing non XML data, but this is not the point,
> you may want to give a look at pypasax (SAX parser for python code
> http://www.logilab.org/pypasax) and vcalsax (SAX parser for VCAL files
> http://www.logilab.org/vcalsax))
> 
> At the very least the parser should inherit from xml.sax.saxlib.XMLReader
> class (actually defined in xml.sax.xmlreader). It should provide
> implementation for the parse(source) method. Other methods of note are the
> set/getProperty methods.
> 
> The parse method should call the self._cont_handler.setLocator() method
> before doing anything else (or omit the call altogether if it doesn't want
> to or cannot provide a locator object). Then during the parse, it can call
> the callbakcs of the various registered handlers, most notably
> startDocument(), endDocument(), startElementNS(), endElementNS(),
> characters().
> 
> For comprehensive documentation on the order of calls, you may want to
> give a look at the javadoc documentation of SAX2 available at
> http://sax.sourceforge.net/apidoc/org/xml/sax/XMLReader.html, you'll need
> to doublecheck for pythonisms in the xml.sax.saxlib module (which provides
> nice default implementatoin for a number of interfaces required by
> XMLReader, such as Attributes and InputSource.

Thank you very much for all the details ! I appreciate your
help.

Now I will just have to wrap my head around this ...

-- 
Marc-Andre Lemburg
CEO eGenix.com Software GmbH
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