Subject: RE: About the declare-flow-object-class From: Avi Kivity <Avi@xxxxxxxxxxxxx> Date: Tue, 6 Jul 1999 09:43:54 +0300 |
On Sunday, July 04, 1999 15:26, Didier PH Martin [SMTP:martind@xxxxxxxxxxxxx] wrote: > > Specs extract: > [178] application-flow-object-class-declaration = (declare-flow- > object-class > identifier string) > This declares identifier to be a flow-object-class-name for a class > with a > public identifier > specified by string. > > It is said that it is an application specific flow object but > nothing is > said about how this is created or where this is stored. > > Question: Does somebody has an idea why a string or public > identifier is > needed? 1. A flow object name (symbol) cannot be guaranteed to be unique, but a public identifier ought to be. 2. A public identifer allows specification of additional information via an external mechanism (for example, the name of the library implementing the flow object) 3. Consistency - anything external or extensible is defined via a public identifier (color spaces, for example) "Any computer science problem can be solved with an additional level of indirection" --- "The only words which have meaning are the last ones spoken" DSSSList info and archive: http://www.mulberrytech.com/dsssl/dssslist
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