Introduction | OPC Technology | OPC Specifications
OPC Data Access Specification | DCOM Configuration | References

OPC Data Access Specification

OPC Item | OPC Group | OPC Server | OPC Client | The Namespace

The Namespace

The namespace contains all data offered by the server. It can be a tree structure with one (flat namespace or more (hierarchical namespace) levels.

In hierarchical namespaces, some items can be grouped in nodes. Nodes represents devices like a PLC or a web server.

Each item can, optionally have an AccessPath. AccessPaths decribe the communication path between the OPC Server and the device.