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| | IRAC 6: Input and Output |
 | | While a logical device abstracts physical devices with similar properties, the purpose of subset facilities is that they should apply to a wider range of physical devices than those encapsulated in a single logical device type. |
 | | A process connector is equivalent to a physical device and provides a mechanism whereby the output of one process to a logical device may be consumed as input from a logical device by another process. |
 | | If, for example, a device does not support cursor control, it may be desirable to let the cursor control sequences echo on the screen (in some readable form) for debugging purposes (that is, to treat the device as another device), to do nothing, or to raise an exception. |
| www.acm.org /sigada/wg/envwg/IRAChtml/IRAC-6.html (3811 words) |
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