| Summary: | 碩士 === 國立清華大學 === 工業工程與工程管理學系 === 87 === STandard for the Exchange of Product model data (STEP) is a neutral data exchange mechanism
that represents product data throughout the life cycle of a product. In recent years, more and more
data models are described and stored in STEP format for various databases. For the purpose of
integrating the databases, a standard is needed to achieve the concept of a virtual database. ISO
TC184/SC4 proposes a standard that can solve the problem of multi-access interfaces. The
standard is called Standard Data Access Interface (SDAI). The SDAI is defined in Part 22 of
the STEP-series standards. It provides an access standard for application programs to adapt the
access interfaces directly by calling the SDAI library. Thus, it can reduce the time in programming
and enforce the code reusability as well as software portability. This research describes the SDAI
specification and depicts the SDAI role in the software development environment. Primarily, the
thesis implements the SDAI on a specific object-oriented database management system (OODBMS),
called Webbased Object Oriented-DataBase (WOO-DB). WOO-DB is developed by the Institute for
Information Industry (III). This database management system has its own object manipulation language
(OML) and object definition language (ODL) that can be used to manipulate and describe the data
of the database. The implementation is achieved by mapping the functions and schemata between the
SDAI and WOO-DB. Once the data access interface is independent from data storage technologies,
the integration of applications can be achieved easily and effectively.
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