A few notes on Delphi, WSDL and SOAP: passing nil values, Document/Literal versus RPC Encoded

I had some notes on Delphi WSDL and SOAP peculiarities somewhere, but I misplaced them.

Luckily, I found some links that explain most of my notes well:

• Passing nil values for simple types
  As of Delphi 2007 you can do this by using TXS… types as mjn summarized in delphi – Blank value in web service for Int64 type – Stack Overflow.
  (I wish a few people would vote to re-open the question. It is not too localized as it applies to everyone wanting to pass 64-bit integer types over SOAP to/from Delphi).
• Document/Literal versus RCP encoded SOAP
  Delphi defaults to RPC Encoded, which is not WS-I Compliant, but Document/Literal style is.
  The Delphi SOAP framework is not listed to be compliant to the WS-I Basic Profile, but it works fine in Document/Literal style mode.
  Aaronaught explains this in c# – Delphi SOAP Envelope and WCF – Stack Overflow.

–jeroen