[UnrealEd]

hi,
i've written a XML parser in python (both reader and writer), and i want to check the structure of the outputted xml document by a dtd (document type definition). i'm using this to send data to flash, through a socket. is it possible to do so: before sending the data to flash, validate the document against the dtd?

thanx,
UnrealEd

[digioz]

Can you post what you have so far? It would make it easier to help.

[UnrealEd]

ok, here's what i have so far (don't mind the dutch language):
The XML Reader
The XML Writer

they both use the CElementTree module. when using em, you have to fill in or an XMLString, or 1 or 2 dictionaries containing the xml-document's structure. something like this:

Code:

a = dict()
a["root"] = dict()
a["root"]["text"] = "Hello World"
a["root"]["username"] = "John"

will result in:

Code:

<root>
  <text>Hello World</text>
  <username>John</username>
</root>

after that the Writer returns the xmlstring, and the Reader will return 2 dictionaries: 1 dict containing the xml nodes, and 1 containing the attributes

thanx for looking in to it,
UnrealEd

[digioz]

Hey bud,

Here is a short list of XML Parsing software (with DTD Validation) that should help you with what you are trying to do:

PyLTXML
PyLTXML is a Python extension wrapping the LTXML parser. It supports DTD validation.
http://www.ltg.ed.ac.uk/software/xml/

cDomlette
cDomlette is part of 4Suite. It is a fast C-based DOM implementation with a Python API, and includes a wrapper of the expat parser. It supports DTD validation. It also supports XInclude and XML Base and XML entity catalogs.
http://4suite.org/

libxml/python
This Python extension module is a wrapper for libxml. It supports DTD validation, XInclude (plus XPointer), XML Base and XML Catalogs.
http://xmlsoft.org/python.html

pyRXP
pyRXP is a Python extension wrapping the RXP XML parser. It supports DTD validation.
http://www.reportlab.com/xml/pyrxp.html

pyexpat
Pyexpat is part of PyXML and is a wrapper of the expat parser. It supports DTD validation.
http://pyxml.sourceforge.net/

qp_xml
qp_xml is part of PyXML. It is a simple parser written entirely in Python with no validation support.
http://pyxml.sourceforge.net/

xmlproc
xmlproc is part of PyXML. It is a parser written entirely in Python. It supports DTD validation and XML catalogs. It provides API access to parsed DTD constructs.
http://pyxml.sourceforge.net/

I hope this helps.

[UnrealEd]

thx for the links,

do you prefere any of these modules? speed is a requirement, cause it needs to be able to parse a xml document of about 3Mb filesize in less then 10 seconds.

if i'm gonna use one of those xml libraries, i'll probably have to rewrite the parser i have now? or is it good enough if i just use the dtd-validation function of 1 module to check the xmlstring written by the cElementTree module?

many thanx,
UnrealEd

[digioz]

It's really a matter of preference. I have used LT XML, because they have good documentation and is pretty fast (I don't know about the 10 second requirement though). You will need to re-write part of the code though, based on which library you choose.