View source for UA Capabilities

OPC UA has been designed for scalability and supports a wide range of application domains, ranging from field level (e.g. devices for measurement or identification, PLCs), to enterprise management support. To achieve these design goals, the OPC UA standard provides a multi-layered architecture as shown in the following figure:

[[File:UA Framework.JPG|500px|right]]

OPC UA is built on the following <b>Infrastructure</b>:
* <b>Discovery</b> which allows Clients to find OPC UA Servers, their supported protocols, security policies and other capabilities.
* <b>Transport</b> which defines protocol mappings that allow establishing a connection and exchanging well-formed messages between OPC UA Applications.
* <b>Information Access</b> which comprises the means to expose object-based Information Models in an Address Space and the Services to access this information.
* <b>Security and Robustness</b>, which are integrated into Transport and Information Access.

<b>Information models</b> are layered on top of this infrastructure. OPC UA specifies a number of base information models (DataAccess – DA, Alarms&Conditions – AC, and more) that define commonly used objects including both real-time and historical data variables and alarms. Industry standard models inherit from and further specialize the lower layer models they are based upon.
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Following is the catalogue of OPC UA Capabilities structured according to the layers and subsystems of the UA Framework outlined before.
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<div style="text-align:right;margin-right:10px;margin-bottom:4px;">'''[[Sequence of Capabilities|&#10148; Or read here for a sequence of all capabilities]] ...'''</div>
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| rowspan="2" align="center" width="34%" style="background:#e2e2e2;" | <b>Infrastructure</b>
| colspan="2" align="center" style="background:#e2e2e2;" | <b>Information Models</b>
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| align="center" style="background:#efefef;" | <b>UA Base Models</b>
| width="34%" align="center" style="background:#efefef;" | <b>Industry Standard Models</b>
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* [[Server Discovery|Discovery]]
* [[Transport Mappings|Transport]]
* [[Data Model and Services|Information Access (Data Model and Services)]]
* [[Security|Security]]
* [[Robustness|Robustness]]
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* [[Base Information Models|Overview]]
* [[Data Access|Data Access]]
* [[Alarms and Conditions|Alarms and Conditions]]
* [[Historical Data Access|Historical Data Access]]
* [[Historical Event Access|Historical Event Access]]
* [[Programs|Programs]]
* [[Certificate Management|Certificate Management]]
* [[Redundancy|Redundancy Support]]
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* [[Industry Standard Models|Overview]]
* [[Device Integration Model (DI)|Device Integration Model (DI)]]
* [[Analyzer Device Integration (ADI)|Analyzer Device Integration (ADI)]]
* [[Field Device Integration (FDI)|Field Device Integration (FDI)]]
* [[PLCopen Model (IEC61131-3)|PLCopen Model (IEC61131-3)]]
* [[BACnet OPC UA Information Model]]
* [[Auto-ID Automatic identification systems]]
* [[MTConnect - Process information from numerically controlled machine tools|MTConnect Model]]
* [[Enterprise-Controlsystem Integration Model (ISA-95)|Enterprise-Controlsystem Integration Model - ISA-95]]
* [[Engineering Data for Production Systems (AutomationML)|Engineering Data for Production Systems - AutomationML]]
* [[MDIS - MCS-DCS Interface Standardization]]
* [[CNC Systems Information Model]]
* [[SERCOS Information Model]]
* [[POWERLINK Information Model]]

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