Common Overview

OPC-UA is built around the concept of namespaces and nodes. This concept is present in the server and the client and therefore much of the code is shared by both. In this section we take a look at the shared part of the library.

The shared code lives in the asyncua.common, asyncua.ua and asyncua.crypto packages and the most important classes and methods from these packages will be discussed in the following sections.

asyncua.common package

The asyncua.common package is provides the core functionality of the library. Several important parts life in this subpackage, for example the Node class and the subscription module. You can find usage examples of these classes and functionalities in the following sections.

asyncua.ua package

The asyncua.ua package contains mostly autogenerated code which reflects the standard objects, attributes and status codes provided by the OPC-UA standard.

asyncua.crypto package

Code related to permissions, security and encryption is located in the asyncua.crypto package.