3 Terms, definitions, and conventions

3.1 Terms and definitions

For the purposes of this document the following terms and definitions as well as the terms and definitions given in OPC 10000-1, OPC 10000-2, OPC 10000-3, OPC 10000-4, OPC 10000-6 and OPC 10000-9 apply.

3.1.1 CertificateManager

a software application that manages the Certificates used by Applications in an administrative domain.

3.1.2 CertificateGroup

a context used to manage the TrustList and Certificate(s) associated with Applications or Users.

3.1.3 CertificateRequest

a PKCS #10 encoded structure used to request a new Certificate from a Certificate Authority.

3.1.4 ClientUrl

a physical address available on a network that allows Servers to initiate a reverse connection.

3.1.5 DirectoryService

a software application, or a set of applications, that stores and organizes information about resources such as computers or services.

3.1.6 DiscoveryServer

an application that maintains a list of OPC UA Applications that are available on the network and provides mechanisms for other OPC UA Applications to obtain this list.

3.1.7 DiscoveryUrl

a URL for a network Endpoint that provides the information required to connect to a Client or Server.

3.1.8 GlobalDiscoveryServer (GDS)

a Server that provides numerous services related to discovery and security management.

3.1.9 GlobalService

a Server that provides centrally managed Capabilities needed for a system.

3.1.10 IPAddress

a unique number assigned to a network interface that allows Internet Protocol (IP) requests to be routed to that interface.

3.1.11 KeyCredential

a unique identifier and a secret used to access an AuthorizationService or a Broker.

3.1.12 KeyCredentialService

a software application that provides KeyCredentials needed to access an AuthorizationService or a Broker.

3.1.13 LocalDiscoveryServer (LDS)

a DiscoveryServer that maintains a list of all Servers that have registered with it.

3.1.14 LocalDiscoveryServer-ME (LDS-ME)

a LocalDiscoveryServer that includes the MulticastExtension.

3.1.15 MulticastExtension

an extension to a LocalDiscoveryServer that adds support for the mDNS protocol.

3.1.16 MulticastSubnet

a network that allows multicast packets to be sent to all nodes connected to the network.

3.1.17 NonUaApplication

an application which is not an OPC UA Application.

3.1.18 Privilege

a named set of rights which cannot be expressed as Permissions granted on Nodes.

3.1.19 PullManagement

a workflow where a Client manages its configuration by using a GlobalService.

3.1.20 PushManagement

a workflow where a GlobalService manages a Server’s configuration.

3.1.21 ServerCapabilityIdentifier

a short identifier which uniquely identifies a set of discoverable Capabilities supported by an OPC UA Application.

3.2 Abbreviations and symbols