WSDL parsing for semi-broken files

[plaes]

I have a semi-broken file that seems to work somewhat okayish (although it skips one service and some of its required definitions) with Python's zeep library (https://docs.python-zeep.org/), but fails with traceback with wsdl-parser (current head: 7f3d433):

thread 'main' panicked at 'Must have content if no 'type' or 'ref' attribute: Element { tag_name: {http://www.w3.org/2001/XMLSchema}element, attributes: [Attribute { name: name, value: "kood" }], namespaces: [Namespace { name: None, uri: "http://www.w3.org/2001/XMLSchema" }, Namespace { name: Some("xrd"), uri: "http://x-road.eu/xsd/xroad.xsd" }, Namespace { name: Some("tns"), uri: "http://rr.x-road.eu/producer" }, Namespace { name: Some("xsd"), uri: "http://www.w3.org/2001/XMLSchema" }, Namespace { name: Some("SOAP-ENC"), uri: "http://schemas.xmlsoap.org/soap/encoding/" }, Namespace { name: Some("soap"), uri: "http://schemas.xmlsoap.org/wsdl/soap/" }, Namespace { name: Some("wsdl"), uri: "http://schemas.xmlsoap.org/wsdl/" }, Namespace { name: Some("id"), uri: "http://x-road.eu/xsd/identifiers" }] }', xsd-parser/src/parser/element.rs:97:13

rr.wsdl.zip