Initial Caals Device Capability Dataset, Version 1. 0. 7 (Classic Reprint) - Softcover

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Excerpt from Initial Caals Device Capability Dataset, Version 1. 0. 7

There are two approaches to interfacing standards: prescriptive and descriptive. The former approach seeks to make all devices look and behave in the same fashion to the controller. The latter concept is to employ a common way to describe the idiosyncrasies of the device and its behavior. Where aspects of devices can easily be made similar, such as communication hardware and software, the prescriptive method is a powerful solution. The 9-pin eia-232 serial and ieee-1284 bi-directional parallel ports found on modern pcs and interfacing standards such as gpib (ieee-488) and the tcp/ip components of network connections are good examples of prescriptive standards. But such standards require the development of consensus in a market sphere that dwarfs the world of laboratory automation. Prescriptive standards can also be constraining to future progress, because new concepts have to be exceptionally promising to gain acceptance over entrenched standards. Finally, some instrument manufacturers, believing that prescriptive standards limit their ability to differentiate their products from those of their competitors, are apprehensive about supporting prescriptive interfacing standards.

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