title: Additional benefit of 3rd party opc software
body: <p>I am planning to add an opc server to my software package.</p>
  
  <p>I have looked at the <a href="http://opcfoundation.org/uasdk/Help/#" rel="nofollow">OPC Foundation's help page</a> and I also downloaded the <a href="http://industrial.softing.com/en/products/functionality/software/opc-development-toolkits/opc-unified-architecture/windows/opc-ua-net-server-development-toolkit.html#articles" rel="nofollow">OPC UA .NET SDK</a> made by a company called Softing (there are others too). Looking at the downloaded software I do not understand if I actually just downloaded software that is provided by the OPC Foundation or if there is an additional value provided by the Softing SDK. I wonder if one cannot obtain the OPC Foundation SDK as a non-member and has to go through vendors?</p>
  
  <p>Would someone be able to clarify this?</p>