OPC UA Glossary
- Address Space
- collection of information that an OPC UA Server makes visible to its Clients
- Attribute
- data element of Node which can be read and written by a Client
- BrowseName
- attribute of Node contains its human-readable name
- Communication Stack
- layered set of software modules between the application and the hardware that provides various
functions to encode, encrypt and format a Message for sending, and to decode, decrypt and unpack
a Message that was received
- Endpoint
- physical address available on a network that allows Clients to access one
or more Services provided by a Server
- Discovery
- mechanism which allows OPC UA Clients to find OPC UA Servers on the network
- DiscoveryUrl
- a URL for a network Endpoint that provides the information required
to connect to a Server
- Information Model
- organizational framework that defines, characterizes and relates information
resources of a given system or set of systems.
- Method
- callable software function that is a component of an Object
- Node
- fundamental component of an Address Space
- Object
- Node that represents a physical or abstract element of a system
- ObjectType
- Node that represents the type definition for an Object
- Reference
- explicit relationship (a named pointer) from one Node to another
- Secure Channel
- a long-term logical connection between a single client and a single server on
Communication Stack’s level
- Service
- client-callable operation in an OPC UA Server
- Session
- a long-term logical connection between a single client and a single server
on OPC UA application level
- Variable
- Node that contains a value