| R.H. Katz, Information Management for Engineering Design, Springer-Verlag, 1985. |
....has powerful advantages when developing large, complex systems. They have reached agreements about separating design artifacts into levels (e.g. architecture, logic design, physical layouts and masks. etc. describing different concerns, and about the precise description of these design artifacts [6, 22]. Separation of concerns is also used to advantage in reflective systems [23] In the Apertos operating system [47] for example, an object is defined independently from its execution environment, in order to facilitate object migration. A similar approach is used to deal with the complexity of ....
R.H. Katz, Information Management for Engineering Design, Springer-Verlag, 1985.
....for local area networks and for projects in which only one engineer works on a design at a time. They are not well suited for enterprise wide networks in which multiple engineers must work on a design concurrently. SECS CE also builds on prior work in management of design versions, such as Katz [Kat85], Batory and Kim [Bat85] and Dittrich and Lorie [Dit88] and on cooperative work technology, such as the MONET system at the Concurrent Engineering Research Center [Kan92] Finally, the SECS CE system is relevant to standards initiatives for design and manufacturing systems. These initiatives can ....
R. Katz, "Information Management for Engineering Design", Springer-Verlag, Surveys in Computer Science, Heidelberg, 1985.
....to fetch the data that represents the object. Fields of type POSTQUEL and procedure can be efficiently supported through a combination of compilation and precomputation described in sections 4 and 5. 3.3. Time Varying Data POSTQUEL allows users to save and query historical data and versions [KATZ85, WOOD83]. By default, data in a relation is never deleted or updated. Conventional retrievals always access the current tuples in the relation. Historical data can be accessed by indicating the desired time when defining a tuple variable. For example, to access historical employee data a user writes ....
Katz, R.H., Information Management for Engineering Design, SpringerVerlag, 1985.
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