[lxml-dev] About objectify

[jholg at gmx.de]

Hi,

 
> I should have written I'd like to define a complex type, as stated in
> the end of the following chapter.
> 
> http://codespeak.net/lxml/objectify.html#how-data-types-are-matched
>  

 Hm, it is not really a complex type (in XML Schema terms), but rather a 
custom 

simple data type. 

 
> In my case, writing a type checker would be impossible - or very
> difficult. I understand I can also use a py:pytype attribute, but I'd
> like to try the xsi namespace if possible.
> 

 Have you tried registering your custom type as an xmlSchemaType, as in:

 >>> my_strange_type.xmlSchemaTypes = ("myns:mytypename",)

 Not sure if this will work though, as lxml.objectify currently expects 
xsi:type 

information to contain xsd:<typename>hints, i.e. the xsi:type infos must 
come

from the XML Schema namespace. At least the DataElement() factory will 
choke:

 >>> objectify.DataElement(3, _xsi="foo:bar")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "lxml.objectify.pyx", line 1708, in lxml.objectify.DataElement
ValueError: XSD types require the XSD namespace
>>> 

  Maybe you can achieve what you need by taking a look at the "Using 
custom element

classes in lxml" section? 


Good luck,

H. 

 
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