Database Access Integration Services (DAIS)

Technical Report · Tue Dec 01 00:00:00 EST 1992

OSTI ID:7369052

Mitchell, P ^[1]; Nordell, D ^[2]

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1. Honeywell, Inc., Minneapolis, MN (United States). Sensor and System Development Center
2. Northern States Power Co., Minneapolis, MN (United States)

The Database Access Integration Services (DAIS) is a collection of services that facilitate access to data among diverse data systems in an electric utility communications network. DAIS provides access to data in distributed, heterogeneous data systems that include relational database management systems, other database management systems, control systems, file systems, and application systems. It also provides a common method for describing data, common data access operations and essential support services including a data dictionary, a data directory and distributed data access management capabilities. The DAIS project has developed specifications intended for vendor and third-party implementation. The software developed is only to implement a data access integration demonstration. These specifications can serve as a basis for influencing industry standards development. One important consequence of this strategy is that most actual software development will be performed by vendors, not utilities. DAIS is a tool to support data access. It is policy neutral regarding issues such as local or central administration of data or standardization of information model contents (e.g., EPRI Plant Information Network). As a tool, it can be used to help realize such policies. The DAIS does not provide data storage facilities, schema integration, distributed query processing, distributed applications or cooperative processing. Rather, DAIS is complementary to these functions and can be used with other software that does provide these functions. This project documented the requirements for the DAIS. These requirements are the basis for design of the DAIS specifications. The key requirements for a DAIS are: Uniform access to heterogeneous utility data systems, remote update; coexistence with local data systems; local autonomy ; Security and access restriction enforcement; OSI compatibility; open architecture and extensibility; and operating platform independence.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); Honeywell, Inc., Minneapolis, MN (United States). Sensor and System Development Center; Northern States Power Co., Minneapolis, MN (United States)
• Sponsoring Organization: EPRI; Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 7369052
• Report Number(s): EPRI-TR-101706-Vol.2
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
ELECTRIC UTILITIES
INFORMATION SYSTEMS
AUTOMATION
COMMUNICATIONS
CONTROL SYSTEMS
DIGITAL SYSTEMS
ENERGY MANAGEMENT
LOAD MANAGEMENT
POWER PLANTS
SPECIFICATIONS
MANAGEMENT
PUBLIC UTILITIES
990301* - Information Handling- Data Handling- (1992-)
990200 - Mathematics & Computers