[pyxb-users] Trouble with namespaces

[Hugo M. <hu...@ca...>]

   Hi, I'm having trouble getting namespaced documents to work.

   I have this (test) schema:

<?xml version="1.0" encoding="UTF-8"?>

<xsd:schema xsd:targetNamespace="http://carfax.org.uk/namespace"
			xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:complexType name="sthType">
  <xsd:attribute name="foo" type="xsd:string"/>
  </xsd:complexType>
<xsd:element name="something" type="sthType"/>
</xsd:schema>

and this XML document, which should, I believe, conform to the schema:

<?xml version="1.0" encoding="UTF-8"?>

<something xmlns="http://carfax.org.uk/namespace" foo="bar">
</something>

I've generated a module (PyXB 1.2.4):

$ pyxbgen -u schema.xsd -m sth
Python for AbsentNamespace0 requires 1 modules

and I'm now trying to open the document:

#!/usr/bin/python3
import sth
doc = sth.CreateFromDocument(open("doc.xml", "r").read())
print(doc)

This gives me:

$ ./test
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/pyxb/namespace/__init__.py", line 307, in categoryMap
    return self.__categoryMap[category]
KeyError: 'elementBinding'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./test", line 5, in <module>
    doc = sth.CreateFromDocument(open("doc.xml", "r").read())
  File "/home/hrm/rostercare/temp/sth.py", line 62, in CreateFromDocument
    saxer.parse(io.BytesIO(xmld))
  File "/usr/lib/python3.4/xml/sax/expatreader.py", line 107, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/usr/lib/python3.4/xml/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)
  File "/usr/lib/python3.4/xml/sax/expatreader.py", line 207, in feed
    self._parser.Parse(data, isFinal)
  File "/usr/lib/python3.4/xml/sax/expatreader.py", line 341, in start_element_ns
    AttributesNSImpl(newattrs, qnames))
  File "/usr/local/lib/python3.4/dist-packages/pyxb/binding/saxer.py", line 324, in startElementNS
    element_binding = name_en.elementBinding()
  File "/usr/local/lib/python3.4/dist-packages/pyxb/namespace/__init__.py", line 104, in __getattr__
    category_value = ns.categoryMap(name).get(self.localName())
  File "/usr/local/lib/python3.4/dist-packages/pyxb/namespace/__init__.py", line 309, in categoryMap
    raise pyxb.NamespaceError(self, '%s has no category %s' % (self, category))
pyxb.exceptions_.NamespaceError: http://carfax.org.uk/namespace has no category elementBinding

   Now, I'm guessing that the problem is indicated with the "Python
for AbsentNamespace0 requires 1 module" message from pyxbgen, but I'm
at a loss to see what the problem is.

   The only concern I have, which is more likely to be a basic XML
question than a PyXB-specific one, is that only the elements in the
schema are namespaced, not the attributes, with the exception of the
xsd:targetNamespace attribute. I can't get pyxbgen to run with xsd:
namespaces on the attributes of the schema, nor with the xsd:
namespace missing from the xsd:targetNamespace attribute. This
confuses me somewhat, in my primitive understanding of XML Schema.

   What am I doing wrong in all of this?

   Thanks,
   Hugo.

-- 
Hugo Mills             | The problem with programmers and the law is not that
hugo@... carfax.org.uk | they treat laws as code, but that they don't
http://carfax.org.uk/  | understand the VM it runs on.
PGP: E2AB1DE4          |