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From: kornfein@uganda.crd.ge.com (Mark M. Kornfein)
Newsgroups: comp.object,comp.software-eng
Subject: Re: Object-Oriented vs. Object-Based
Keywords: Ada
Message-ID: <18247@crdgw1.crd.ge.com>
Date: 4 Apr 91 20:11:22 GMT
References: <1991Apr3.231849.13410@m.cs.uiuc.edu> <1991Apr4.172417.3266@linus.mitre.org>
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Reply-To: kornfein@uganda.crd.ge.com (Mark M. Kornfein)
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In article <1991Apr4.172417.3266@linus.mitre.org> dmg@retina.mitre.org (David Gursky) writes:
>I've heard said that Ada is "Object-based" as opposed to "Object-Oriented".
>Now I make no pretentions about knowing some undeniable truth as to what
>"Object-Oriented" means (this being the subject of many a discussion at
>OOPSLA), but could someone enlighten me on what "Object-based" is suppose to
>mean?

My understanding of "Object-based" is that it is a system using objects but
without inheritence. Object based systems allow you to create objects (at run 
time) and have methods that apply to that object but the methods can not be 
used for other objects as can be done with inheritence. 

Not being familiar with Ada I don't know if it is object based.

On a project I am currently on is Object based due to some
constraints which due not allow us to use inheritence. I have found it to be
a useful approach and more powerful than C which is what the object based
system is built on.


                                                       
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Mark Kornfein                            INET: kornfein@crd.ge.com 
GE Corporate R&D Center	                 UUCP: uunet!crd.ge.com!kornfein
Schenectady, NY