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OBIX (OPEN BUILDING INFORMATION XCAHNGE)
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- 3. What is oBIX? oBIX (OASIS Open Building Information Xchange Technical Committee) is an industry-wide initiative to define XML- and Web services-based mechanisms for building control systems. oBIX (for Open Building Information Exchange) is a standard for RESTful Web Services-based interfaces to building control systems. oBIX is about reading and writing data over a network of devices using XML and URIs, within a framework specifically designed for building automation.
- 4. History The effortto develop the oBIX standard was initiated in April 2003 by the Continental Automated Buildings Association (CABA), an industry group that promotes advanced technologies for the automation of homes and buildings in North America. A year later, CABA transferred oversight of the effort to the Organization for the Advancement of Structured Information Standards (OASIS), a not-for-profit international consortium that develops e-business standards.
- 5. Mission & Vision The mission of the Open Building Information Exchange (oBIX) committee is to develop a publicly available web services interface specification that can be used to obtain data in a simple and secure manner from HVAC, access control, utilities, and other building automation systems, and to provide data exchange between facility systems and enterprise applications.
- 6. Based on TheoBIX standard is being developed around Extensible Markup Language (XML), which is itself an evolving standard for communicating complex data across the Internet. Hypertext Markup Language (HTML) is the preferred tool for organizing text and images on Web pages. XML is the preferred tool for mining and monitoring Web-based data.
- 7. oBIX Open –all technical details freely available Building – any and all building systems Information – pertinent system data Xchange – interoperability
- 8. Where is databuried ? HVAC Lighting Life Safety Card Access Security Energy Management
- 9. How is thedata structured ? Simple data follows the SI system: Mass in kilograms Length in meters Time in seconds More complex data structures are built from these
- 10. What kind ofdata ? Simple: Room Temperature of Lobby Lengthy: List of people currently in East Wing with time of entry Complex: Current state of all systems across an entire university campus Reports: Variation of internal humidity of sports hall over the last 6 months
- 11. How is thedata accessed ? Data is accessed at a ‘Datapoint’ and exposed by a ‘Point Service’ Datapoints are revealed by a ‘Discovery Service’ Data trends are reported by a ‘History Service’ Critical events are signalled by the ‘Alarm Service’
- 12. Elements of oBIX Points: representing a single scalar value and its status – typically these map to sensors, actuators, or configuration variables like a setpoint. Alarming: modeling, routing, and acknowledgment of alarms. Alarms indicate a condition which requires notification of either a user or another application. Histories: modeling and querying of time sampled point data. Typically edge devices collect a time stamped history of point values which can be fed into higher level applications for analysis.
- 34. Advantages Enables BuildingManagement Systems to communicate with external services. Represents information in a standardized format. Enables defining specialized contracts to invoke operations based on security permission and situation awareness. Provides for changing permissions based on alarm states
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