de acordo com o comentário de George:
thufir@doge:~$
thufir@doge:~$ echo $JAVA_HOME
/usr/lib/jvm/java-8-openjdk-amd64/
thufir@doge:~$
thufir@doge:~$ jars/apache-cxf-3.1.11/bin/wsdlvalidator https://www.w3schools.com/xml/tempconvert.asmx?WSDL
WSIBP Validator found <{https://www.w3schools.com/xml/}TempConvertHttpPost> is NOT a SOAP binding
WSDLValidator Error :
line 127 column 66 of https://www.w3schools.com/xml/tempconvert.asmx?WSDL: cvc-complex-type.4: Attribute 'part' must appear on element 'mime:content'.
line 136 column 66 of https://www.w3schools.com/xml/tempconvert.asmx?WSDL: cvc-complex-type.4: Attribute 'part' must appear on element 'mime:content'.
thufir@doge:~$
Então, isso é um dado bastante útil.