In the download package, extensive programming example objects, as well as a HTML documentation are included.
A quick start guide for the respective version can be found under the following links:
.Net https://www.plccom.de/help_opc_ua_client_sdk/net/FirstSteps_PLCcom.Opc.Ua.Sdk_V7_english.pdf
Java https://www.plccom.de/help_opc_ua_client_sdk/java/FirstSteps_PLCcom.Opc.Ua.Client.Sdk_V7_english.pdf
Download current version of documentation:
.Net https://www.plccom.de/help_opc_ua_client_sdk/net/help/index.html
Java https://www.plccom.de/help_opc_ua_client_sdk/java/javadoc/index.html