For the purposes of this document the following terms and definitions as well as the terms and definitions given in The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments and errata) applies.The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments and errata) applies.

OPC 10000-1, OPC 10000-2, OPC 10000-3, OPC 10000-4, OPC 10000-6 and OPC 10000-9 apply.

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

a context used to describe the Trust List and Certificate(s) associated with an Application.

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

a unique identifier and a secret used to access a Server, an Authorization Service or a Broker.

Note 1 to entry: a user name and password is an example of a credential.

a software application that provides KeyCredentials needed to access a Server, an Authorization Service or a Broker.

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

an Application that maintains a list of OPC UA Servers that are available on the network and provides mechanisms for Clients to obtain this list.

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

a DiscoveryServer that maintains a list of OPC UA Applications available in an administrative domain.

Note 1 to entry: a GDS may also provide certificate management services.

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

Note 1 to entry: An IPAddress for a host may change over time.

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

Note 1 to entry: Servers normally register with the LDS on the same host.

a LocalDiscoveryServer that includes the MulticastExtension.

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

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

Note 1 to entry: a MulticastSubnet is not necessarily the same as a TCP/IP subnet.

a secured resource on a network that provides functionality used by Clients and/or Servers.

Note 1 to entry: an Authorization Service (AS) is an example of a Network Service.

a short identifier which uniquely identifies a set of discoverable capabilities supported by a Server.

Note 1 to entry: the list of the currently defined ServerCapabilityIdentifiers is in Annex D.

APIApplication Programming Interface

CACertificate Authority

CRLCertificate Revocation List

CSRCertificate Signing Request

DERDistinguished Encoding Rules

DHCPDynamic Host Configuration Protocol

DNSDomain Name System

ESTEnrolment over Secure Transport

GDSGlobal Discovery Server

IANA The Internet Assigned Numbers Authority

LDAPLightweight Directory Access Protocol

LDSLocal Discovery Server

LDS-MELocal Discovery Server with the Multicast Extension

mDNSMulticast Domain Name System

NATNetwork Address Translation

PEM Privacy Enhanced Mail

PFXPersonal Information Exchange

PKCSPublic Key Cryptography Standards

SHA1Secure Hash Algorithm

SSLSecure Socket Layer

TLSTransport Layer Security

UA Unified Architecture

UDDIUniversal Description, Discovery and Integration

This standard uses multiple namespaces to define Nodes. The following abbreviations are used in the definitions for these Nodes:

CORE http://opcfoundation.org/UA/

GDS http://opcfoundation.org/UA/GDS/

The default namespace for each Node is defined at the top of the table. All of the BrowseNames in the table use the default namespace unless the BrowseName is preceded by one of the above abbreviations.

The NamespaceMetadataType Object for the GDS namespace is defined Table 1.

Table 1 – GDS NamespaceMetadataType Object Definition

Attribute

Value

BrowseName

http://opcfoundation.org/UA/GDS/

Namespace

GDS (see 3.3)

TypeDefinition

NamespaceMetadataType defined in OPC 10000-5.

References

NodeClass

BrowseName

Value

HasProperty

Variable

NamespaceUri

http://opcfoundation.org/UA/GDS/

HasProperty

Variable

NamespaceVersion

1.04

HasProperty

Variable

NamespacePublicationDate

2016-12-31