[XML-SIG] traversing xml tree is incomplete

[Julien Motch]

Hi All,

I am new to xml and experiencing  problems by traversing an xml tree.
The python program is :
#audio.py
#!/usr/bin/python
import sys
from xml.dom.ext.reader import Sax2
from xml.dom.NodeFilter import NodeFilter

# create Reader object
reader = Sax2.Reader()

# parse the document
doc = reader.fromStream(sys.stdin)

walker = doc.createTreeWalker(doc.documentElement,
                              NodeFilter.SHOW_ELEMENT, None, 10)

while 1:
    print walker.currentNode.tagName
    next = walker.nextNode()
    if next is None: break

it is called as it : cat afxc.xml & ./audio.xml

and the afx.xml file is :
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE CDInfo SYSTEM "http://www.musicbrainz.org/dtd/CDInfo.dtd">
<CDInfo>
   <Title>26 Mixes for Cash\Disc 1</Title>
   <NumTracks>13</NumTracks>
   <IdInfo>
      <DiskId>
            <Id>P_KmeuFUQTSj5Tymmor.07xxgyY-</Id>
      </DiskId>
   </IdInfo>   
   <SingleArtistCD>
      <Artist>Aphex Twin</Artist>
      <Track Num="1">
         <Name>Time To Find Me (AFX Fast Mix) [Seefeel]</Name>
      </Track>
      <Track Num="2">
         <Name>Raising The Titanic (Big Drum Mix) [Gavin Bryars]</Name>
      </Track>
      <Track Num="3">
         <Name>Journey (Aphex Twin Care Mix) [Gentle People]</Name>
      </Track>
      <Track Num="4">
         <Name>Triachus (Mix by Aphex Twin) [Kinesthesia]</Name>
      </Track>
      <Track Num="5">
         <Name>Heroes (Aphex Twin Remix) [Philip Glass]</Name>
      </Track>
      <Track Num="6">
         <Name>In The Glitter Part 2 (Aphex Twin Mix) [Buck Tick]</Name>
      </Track>
      <Track Num="7">
         <Name>Zeroes and Ones (Aphex Twin Reconstruction #2) [Jesus
Jones]</Name>
      </Track>
      <Track Num="8">
         <Name>Ziggy (Aphex Twin Mix #1) [Nav Katze]</Name>
      </Track>
      <Track Num="9">
         <Name>Your Head My Voice (Voix Revirement) [Saint
Etienne]</Name>
      </Track>
      <Track Num="10">
         <Name>Change (Aphex Twin Mix #2) [Nav Katze]</Name>
      </Track>
      <Track Num="11">
         <Name>Une Femme N'est Pas Un Homme (Aphex Twin Mix) [The
Beatniks]</Name>
      </Track>
      <Track Num="12">
         <Name>The Beauty of Being Numb Section B (Created by Aphex
Twin) [Nine Inch Nails]</Name>
      </Track>
      <Track Num="13">
         <Name>Let My Fish Loose (Aphex Twin Remix) [Nobukazu
Takemura]</Name>
      </Track>
   </SingleArtistCD>

</CDInfo>

The output of the program is :

CDInfo
Title
NumTracks
IdInfo
DiskId
Id
which is quite strange as it does not print the track and name element .

but if I remove the lines :
 <IdInfo>
      <DiskId>
            <Id>P_KmeuFUQTSj5Tymmor.07xxgyY-</Id>
      </DiskId>
   </IdInfo>   

the the output seems normal and is :

CDInfo
Title
NumTracks
SingleArtistCD
Artist
Track
Name
Track
Name
Track
Name
Track
Name
Track
Name
Track
Name
Track
Name
Track
Name
Track
Name
Track
Name
Track
Name
Track
Name
Track
Name

Is it a bug or is my xml file not well formed ?

Thanks ,Julien.

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