Data event

Data event

A data event is a relevant state transition defined in an event schema[1]. Typically, event schemata are described by pre- and post condition for a single or a set of data items. In contrast to ECA (Event condition action), which considers an event to be a signal, the data event not only refers to the change (signal), but describes specific state transitions, which are referred to in ECA as conditions.

Considering data events as relevant data item state transitions allows defining complex event-reaction schemata for a database. Defining data event schemata for relational databases is limited to attribute and instance events. Object-oriented databases also support collection properties, which allows defining changes in collections as data events, too.

References

  1. ^ Karge, R. (July 2003). "Unified Database Theory" (PDF document). The 7th World Multi-Conference on SYSTEMICS, CYBERNETICS AND INFORMATICS - SCI 2003. Orlando, Florida (USA). http://www.odaba.com/content/downloads/documentation/P1_UnifiedDatabaseTheory.pdf. 

Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Event data — is a synonym to an audit trail. Modern computer software applications and IT infrastructure have adopted the term event data over audit trail. Events are typically recorded in logs and there is no standard for the format of event type data.… …   Wikipedia

  • Data loss — is an error condition in information systems in which information is destroyed by failures or neglect in storage, transmission, or processing. Information systems implement backup and disaster recovery equipment and processes to prevent data loss …   Wikipedia

  • Event-driven architecture — (EDA) is a software architecture pattern promoting the production, detection, consumption of, and reaction to events. An event can be defined as a significant change in state [K. Mani Chandy Event Driven Applications: Costs, Benefits and Design… …   Wikipedia

  • Event Stream Processing — Event Stream Processing, or ESP, is a set of technologies designed to assist the construction of event driven information systems. ESP technologies include event visualization, event databases, event driven middleware, and event processing… …   Wikipedia

  • Data governance — is an emerging discipline with an evolving definition. The discipline embodies a convergence of data quality, data management, data policies, business process management, and risk management surrounding the handling of data in an organization.… …   Wikipedia

  • Data dredging — (data fishing, data snooping) is the inappropriate (sometimes deliberately so) use of data mining to uncover misleading relationships in data. Data snooping bias is a form of statistical bias that arises from this misuse of statistics. Any… …   Wikipedia

  • Data, context and interaction — (DCI) is a paradigm used in computer software to program systems of communicating objects. Its goals are: To improve the readability of object oriented code by giving system behavior first class status; To cleanly separate code for rapidly… …   Wikipedia

  • Data Securities International — Data Securities International, DSI is a company based in San Francisco, California that escrows source code for licensees. History In 1981, mathematician Dwight Olson saw an opportunity in the infant software product industry. Software companies… …   Wikipedia

  • Event condition action — (ECA) is a short cut for referring to the structure of active rules in event driven architecture and database systems. Such a rule did traditionally consist of three parts:* The event part specifies the signal that triggers the invocation of the… …   Wikipedia

  • Data Transmission — is a London based electronic and dance music website founded in February 2008, covering all aspects and all genres of the global scene therein. The aim of the site is to cover all genres without prejudice, combining well written content and… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”