Problem with xmlproc

Hello everybody.
I have a problem with xmlproc.
If I have a dtd in the direcory of this file, the parser send me to 
video the elelments and the attirbutes of the dtd.
this is the video output:

sbaush@sbaush:/media/hda5/Universita'/Tesi/Manager$ python parser2.py
ELEMENTO: meshap-manager - (u'|', [(u'iptables-request', ''), 
(u'iptables-response', ''), (u'routing-table-request', ''), 
(u'routing-table-response', '')], '')
ELEMENTO: iptables-request - (u'|', [(u'policy', ''), (u'list', ''), 
(u'flush', ''), (u'append', ''), (u'delete', '')], '')
ELEMENTO: policy - EMPTY
ATTRIBUTO: chain - Elemento: policy - Contenuto: [u'INPUT', u'OUTPUT', 
u'FORWARD'] #REQUIRED - Default:[None]
ATTRIBUTO: target - Elemento: policy - Contenuto: [u'DROP', u'ACCEPT', 
u'REJECT'] #REQUIRED - Default:[None]
ELEMENTO: list - EMPTY
ATTRIBUTO: chain - Elemento: list - Contenuto: [u'INPUT', u'OUTPUT', 
u'FORWARD'] #IMPLIED - Default:[None]
ELEMENTO: flush - EMPTY
ATTRIBUTO: chain - Elemento: flush - Contenuto: [u'INPUT', u'OUTPUT', 
u'FORWARD'] #IMPLIED - Default:[None]
ELEMENTO: append - (u',', [(u'protocol', u'?'), (u'source', u'?'), 
(u'destination', u'?'), (u'jump', '')], '')
ATTRIBUTO: chain - Elemento: append - Contenuto: [u'INPUT', u'OUTPUT', 
u'FORWARD'] #REQUIRED - Default:[None]
ELEMENTO: protocol - EMPTY
ATTRIBUTO: type - Elemento: protocol - Contenuto: [u'tcp', u'udp', 
u'icmp'] #REQUIRED - Default:[None]
ELEMENTO: source - EMPTY
ATTRIBUTO: address - Elemento: source - Contenuto: CDATA #REQUIRED - 
Default:[None]
ELEMENTO: destination - EMPTY
ATTRIBUTO: address - Elemento: destination - Contenuto: CDATA #REQUIRED 
- Default:[None]
ELEMENTO: jump - EMPTY
ATTRIBUTO: option - Elemento: jump - Contenuto: [u'DROP', u'ACCEPT', 
u'REJECT'] #REQUIRED - Default:[None]
ELEMENTO: delete - (u'|', [(u',', [(u'protocol', u'?'), (u'source', ''), 
(u'jump', '')], ''), (u'number', '')], '')
ATTRIBUTO: chain - Elemento: delete - Contenuto: [u'INPUT', u'OUTPUT', 
u'FORWARD'] #REQUIRED - Default:[None]
ELEMENTO: number - EMPTY
ATTRIBUTO: line - Elemento: number - Contenuto: CDATA #REQUIRED - 
Default:[None]
ELEMENTO: iptables-response - (u'|', [(u'done', ''), (u'listtable', 
'')], '')
ELEMENTO: done - EMPTY
ATTRIBUTO: value - Elemento: done - Contenuto: [u'true', u'false'] 
#REQUIRED - Default:[None]
ELEMENTO: listtable - ('', [(u'table', u'+')], '')
ELEMENTO: table - ('', [(u'rule', u'*')], '')
ATTRIBUTO: chain - Elemento: table - Contenuto: [u'INPUT', u'OUTPUT', 
u'FORWARD'] #REQUIRED - Default:[None]
ATTRIBUTO: policy - Elemento: table - Contenuto: [u'ACCEPT', u'DROP', 
u'REJECT'] #REQUIRED - Default:[None]
ELEMENTO: rule - EMPTY
ATTRIBUTO: number - Elemento: rule - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: target - Elemento: rule - Contenuto: [u'ACCEPT', u'DROP', 
u'REJECT'] #REQUIRED - Default:[None]
ATTRIBUTO: protocol - Elemento: rule - Contenuto: [u'tcp', u'udp', 
u'icmp'] #REQUIRED - Default:[None]
ATTRIBUTO: option - Elemento: rule - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: source - Elemento: rule - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: destination - Elemento: rule - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: description - Elemento: rule - Contenuto: CDATA #REQUIRED - 
Default:[None]
ELEMENTO: routing-table-request - EMPTY
ELEMENTO: routing-table-response - ('', [(u'route', '')], '')
ELEMENTO: route - ('', [(u'row', u'*')], '')
ELEMENTO: row - EMPTY
ATTRIBUTO: interface - Elemento: row - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: destination - Elemento: row - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: gateway - Elemento: row - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: flags - Elemento: row - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: refcnt - Elemento: row - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: use - Elemento: row - Contenuto: CDATA #REQUIRED - Default:[None]
ATTRIBUTO: metric - Elemento: row - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: mask - Elemento: row - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: mtu - Elemento: row - Contenuto: CDATA #REQUIRED - Default:[None]
ATTRIBUTO: window - Elemento: row - Contenuto: CDATA #REQUIRED - 
Default:[None]
ATTRIBUTO: irtt - Elemento: row - Contenuto: CDATA #REQUIRED - 
Default:[None]

It works perfectly. The question is: what is the "u" in the elements??
Thanks to all.
below there is my code.


from xml.parsers.xmlproc import xmlproc
import sys

class DTDReporter(xmlproc.DTDConsumer):
    "A simple class that just prints out the events it receives."

    def __init__(self,parser,out=sys.stdout):
        xmlproc.DTDConsumer.__init__(self,parser)
        self.out=out

    def new_attribute(self,elem,attr,a_type,a_decl,a_def):
        self.out.write("ATTRIBUTO: %s - Elemento: %s - Contenuto: %s %s 
- Default:[%s]\n" % (attr,elem,a_type,a_decl,a_def))

    def new_element_type(self,elem_name,elem_cont):
        self.out.write("ELEMENTO: %s - %s\n" % (elem_name,elem_cont))

    # --- Client methods

    def close(self):
        self.out.close()

# --- Main program

if __name__ == '__main__':
    t=xmlproc.DTDParser()
    t.set_dtd_consumer(DTDReporter(t))
    #Si sceglie se parsare il file messo come input da tastiera o se il 
file sul disco. Si puo' dare anche il percorso di localizzazione del file.
    #t.parse_resource(sys.argv[1])
    t.parse_resource("MeshAP2.dtd")
   


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