Generate oneOf for xsd:choice

I'm trying to convert an XSD with lots of tags xsd:choice into a JSON Schema, using your compiler (through Clemens' http://www.xml-buddy.com/ValidatorBuddy.htm)

The good thing is that I got a JSON schema out, which is great already! However, I was expecting to get oneOf keywords. Example:

```

```

gets returned as:

``` "PostalCodeMunicipalityComplexType":{
"type":"object",
"title":"PostalCodeMunicipalityComplexType",
"properties":{
"structuredPostalCodeMunicipality":{
"title":"structuredPostalCodeMunicipality",
"allOf":[
{
"$ref":"#/definitions/StructuredPostalCodeMunicipalityComplexType"
}
],
"propertyType":"element",
"elementName":{
"localPart":"StructuredPostalCodeMunicipality",
"namespaceURI":"http://schema...."
}
},
"unstructuredPostalCodeMunicipality":{
"title":"unstructuredPostalCodeMunicipality",
"allOf":[
{
"$ref":"http://www.jsonix.org/jsonschemas/w3c/2001/XMLSchema.jsonschema#/definitions/string"
}
],
"propertyType":"element",
"elementName":{
"localPart":"UnstructuredPostalCodeMunicipality",
"namespaceURI":"http://schema..."
}
}
},
"typeType":"classInfo",
"typeName":{
"localPart":"PostalCodeMunicipalityComplexType",
"namespaceURI":"http://schema..."
},
"propertiesOrder":[
"structuredPostalCodeMunicipality",
"unstructuredPostalCodeMunicipality"
]
}
```

What am I doing wrong, or misunderstanding?