9 Profiles and Namespaces 
9.2 OPC UA Conformance Units and Profiles
This chapter defines the corresponding profiles and conformance units for the OPC UA Information Model for TMC Profiles are named groupings of conformance units. Facets are profiles that will be combined with other Profiles to define the complete functionality of an OPC UA Server or Client.
9.2.1 Server Facets
The following table specify the facets available for Servers that implement the TMC Information Model companion standard.
Table 78 – TMC Server Facet Definition
| Conformance Unit | Description | Optional/ Mandatory |
|---|---|---|
| TMC Essential | Essential server features. See chapter 6.15.2 for more information. | M |
| TMC Advanced | Advanced server features. See chapter 6.15.2 for more information. | O |
| Profile | ||
| Standard UA Server Profile | M | |
| Base Server Behaviour Facet | M | |
| Request State Change Server Facet | M | |
| File Access Server Facet | M | |
| Documentation Server Facet | O | |
| Durable Subscription Server Facet | O | |
| Data Access Server Facet | M | |
| ComplexType Server Facet | M | |
| Standard Event Subscription Server Facet | M | |
| Address Space Notifier Server Facet | M | |
| Method Server Facet | M | |
| Standard Event Subscription Server Facet | M | |
| Historical Raw Data Server Facet | M | |
| HIstorical Data AtTime Server Facet | M | |
| Historical Access Structured Data Server Facet | O | |
| Base Historical Event Server Facet | M | |
| Security Policy [B] - Basic256SHA256 | M | |
| Security User Access Control Full | M | |
| Security Time Synch - NTP/OS based support | M | |
| Best Practice - Time Outs | M |