Dear Haskellers, I am considering implementing the OPC XML DA standard [1] in Haskell. OPC XML DA is based on SOAP and is used for communicating with servers controlling hardware such as power plants. Currently the only open implementation known to me is PyOPC [2], which is based on an outdated Python libraries. However, Python seems not the nicest language for writing code that is devoid of bugs showing at runtime only. The OPC XML DA standard comes with a WSDL document (600 lines). There is a wsdl package on hackage, but it is incomplete. Can anyone share experience in implementing a webservice specified as WSDL? Actually, the client side would be enough for my purposes. That is, compose well-formed messages and parse the responses. Thanks, Olaf [1] https://opcfoundation.org/developer-tools/specifications-classic/xml-data-ac... [2] https://libraries.io/pypi/PyOPC