4.1 Introduction to Cloud Library

The UA Cloud Library is an online store of OPC UA NameSpaces. It provides a mandatory REST interface (as well as additional option interfaces) to upload, download and query for NameSpaces.

For a Client application to access information from a machine today, it must browse the AddressSpace of the OPC UA Server when it is online. The final configuration can only happen when the Server is online. For example, an industrial robot typically has an OPC UA Server built in. An AddressSpace can contain a combination of machine-specific and vendor-neutral Namespaces.

See here for a typical, standardized OPC UA information model (that can be part of an AddressSpace of a real OPC UA server).

To identify a stored NameSpace in the Cloud Library, a globally unique identifier such as the NamespaceUri (as defined in OPC 10000-100) can be used.