Suitable 'Union' member type not correctly recognized when parsing XML

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Suitable 'Union' member type not correctly recognized when parsing XML



I have been provided with an XSD with the following definition of the type AnySimple (I do not know why this type has been defined, but in any case it is distinct from xsd:anySimpleType):


AnySimple


xsd:anySimpleType


<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:Core="http://www.foo.com/Core/PrimitiveTypes" targetNamespace="http://www.foo.com/Core/PrimitiveTypes" elementFormDefault="unqualified" attributeFormDefault="unqualified">

<xsd:simpleType name="AnySimple">
<xsd:annotation>
<xsd:documentation>container for any simple type</xsd:documentation>
</xsd:annotation>
<xsd:union memberTypes="xsd:string xsd:boolean xsd:byte xsd:short xsd:int xsd:long xsd:unsignedByte xsd:unsignedShort xsd:unsignedInt xsd:unsignedLong xsd:float xsd:double xsd:dateTime xsd:duration"/>
</xsd:simpleType>
...



After generating Python code from this XSD with pyxb, when I parse an XML document which I know to be valid, I get the following error which states that an xsd:int cannot be an AnySimple:


xsd:int


AnySimple


File "/usr/lib/python3/dist-packages/pyxb/namespace/builtin.py", line 133, in _InterpretTypeAttribute
raise pyxb.BadDocumentError('%s value %s is not subclass of element type %s' % (type_name, type_en, type_class._ExpandedName))
pyxb.exceptions_.BadDocumentError: xsd:int value http://www.w3.org/2001/XMLSchemaint is not subclass of element type http://www.foo.com/Core/PrimitiveTypesAnySimple



What has gone wrong?



Edit:



For reference, here is the generated code for the AnySimple type, where the list of members seems to be correct:


AnySimple


# Union simple type: http://www.foo.com/Core/PrimitiveTypesAnySimple
# superclasses pyxb.binding.datatypes.anySimpleType
class AnySimple (pyxb.binding.basis.STD_union):

"""container for any simple type"""

_ExpandedName = pyxb.namespace.ExpandedName(Namespace, 'AnySimple')
_XSDLocation = pyxb.utils.utility.Location('/home/user/myproject/xsd/Core/PrimitiveTypes.xsd', 36, 3)
_Documentation = 'container for any simple type'

_MemberTypes = ( pyxb.binding.datatypes.string, pyxb.binding.datatypes.boolean, pyxb.binding.datatypes.byte, pyxb.binding.datatypes.short, pyxb.binding.datatypes.int, pyxb.binding.datatypes.long, pyxb.binding.datatypes.unsignedByte, pyxb.binding.datatypes.unsignedShort, pyxb.binding.datatypes.unsignedInt, pyxb.binding.datatypes.unsignedLong, pyxb.binding.datatypes.float, pyxb.binding.datatypes.double, pyxb.binding.datatypes.dateTime, pyxb.binding.datatypes.duration, )

AnySimple._CF_pattern = pyxb.binding.facets.CF_pattern()
AnySimple._CF_enumeration = pyxb.binding.facets.CF_enumeration(value_datatype=AnySimple)
AnySimple._InitializeFacetMap(AnySimple._CF_pattern,
AnySimple._CF_enumeration)
Namespace.addCategoryObject('typeBinding', 'AnySimple', AnySimple)
_module_typeBindings.AnySimple = AnySimple




1 Answer
1



This seems to be related to this issue, found in the documentation of PyXB: http://pyxb.sourceforge.net/userref_usebind.html#coping-with-wrong-xsi-type-attributes



The error can be solved by adding a line in the code previous to the parsing of the XML file, that relaxes the strictness of the XML interpretation:


pyxb.namespace.builtin.XMLSchema_instance.ProcessTypeAttribute(
pyxb.namespace.builtin._XMLSchema_instance.PT_lax)






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