Re: LSP Was: Mixing OO and DB

ram@xxxxxxxxxxxxxxxxxx (Stefan Ram) wrote:
"Daniel T." <daniel_t@xxxxxxxxxxxxx> writes:

I think the phrase that is often quoted from the Liskov papers is
unfortunate because it says nothing of *her* solution to the problem. A
better quote from her '99 paper is:

"the subtype ought to preserve any properties that can be proved
about the supertype."

Yes. See also

http://www.cs.cmu.edu/~wing/publications/LiskovWing94.pdf
http://citeseer.ist.psu.edu/liskov94behavioral.html

Or

http://citeseer.ist.psu.edu/liskov92family.html

She's written basically the same paper at least 3 times as far as I can
tell.
.

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