[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: OO Schemas
On Thu, 17 Sep 1998, Andy Dent wrote: > At 7:49 AM +0800 17/9/98, Paul Prescod wrote: > >So to me, "inheritance" between element types would be > ... > > > >Subclassing, on the other hand > I think it is extremely dangerous to have different definitions for > subclassing vs inheritance. The chance of confusion is way too high. Please > use two terms which are less likely to be mixed in communication. The fact that theAt 7:49 AM +0800 17/9/98, Paul Prescod wrote: > >So to me, "inheritance" between element types would be > ... > > > >Subclassing, on the other hand > I think it is extremely dangerous to have different definitions for > subclassing vs inheritance. The chance of confusion is way too high. Please > use two terms which are less likely to be mixed in communication. The difference in meanings is inherent. The word subtype (perhaps not subclass) is very formally defined. The word inherit is perhaps not formally defined, but has a very common English-language meaning. There is essentially no relationship between those meanings. I don't "inherit" my type from my father when he dies. I get "stuff" from him. It is worth noting that Simula did not call its "class extensions" inheritance. http://www-leland.stanford.edu/class/cs242/outlines-95/simula.html I presume that Smalltalk was what changed the names. In Smalltalk, the difference between inheritance and subclassing would be more or less irrelevant. In statically typed languages (like XML) the difference is huge. Paul Prescod xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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