<!-- MHonArc v2.4.4 --> <!--X-Subject: [MUD-Dev] Re: DBMS in MU*'s --> <!--X-From-R13: X Q Znjerapr <pynjNhaqre.rate.ftv.pbz> --> <!--X-Date: Tue, 11 Aug 1998 16:14:34 -0700 --> <!--X-Message-Id: 199808112314.QAA06303#under,engr.sgi.com --> <!--X-Content-Type: text/plain --> <!--X-Reference: 7718286E10FD.AAADA8#smtp01,wxs.nl --> <!--X-Head-End--> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <html> <head> <title>MUD-Dev message, [MUD-Dev] Re: DBMS in MU*'s</title> <!-- meta name="robots" content="noindex,nofollow" --> <link rev="made" href="mailto:claw#under,engr.sgi.com"> </head> <body background="/backgrounds/paperback.gif" bgcolor="#ffffff" text="#000000" link="#0000FF" alink="#FF0000" vlink="#006000"> <font size="+4" color="#804040"> <strong><em>MUD-Dev<br>mailing list archive</em></strong> </font> <br> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] <br clear=all><hr> <!--X-Body-Begin--> <!--X-User-Header--> <!--X-User-Header-End--> <!--X-TopPNI--> Date: [ <a href="msg00667.html">Previous</a> | <a href="msg00669.html">Next</a> ] Thread: [ <a href="msg00259.html">Previous</a> | <a href="msg00678.html">Next</a> ] Index: [ <A HREF="author.html#00668">Author</A> | <A HREF="#00668">Date</A> | <A HREF="thread.html#00668">Thread</A> ] <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> <H1>[MUD-Dev] Re: DBMS in MU*'s</H1> <HR> <!--X-Subject-Header-End--> <!--X-Head-of-Message--> <UL> <LI><em>To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI> <LI><em>Subject</em>: [MUD-Dev] Re: DBMS in MU*'s </LI> <LI><em>From</em>: J C Lawrence <<A HREF="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</A>></LI> <LI><em>Date</em>: Tue, 11 Aug 1998 16:14:22 -0700</LI> <LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI> </UL> <!--X-Head-of-Message-End--> <!--X-Head-Body-Sep-Begin--> <HR> <!--X-Head-Body-Sep-End--> <!--X-Body-of-Message--> <PRE> On Sun, 19 Jul 1998 20:46:15 +0200 Asmodai <Jeroen> wrote: > At 19:37 19-07-98 , you wrote: Please use full attributions that identify the original poster. Attributing to "you" is not good enough. See: <A HREF="http://www.kanga.nu/~petidomo/lists/mud-dev/index.html#rules">http://www.kanga.nu/~petidomo/lists/mud-dev/index.html#rules</A> and rule #5 in particular. > A ORDBMS would be better than either a OO- or R-DBMS alone in my > humble revised opinion as objects (or items and such) are related to > a person or location, but can be children of one parent. This depends on your object model. It can be true, or might not. There are (dis-)advantages both ways. Consider the implications for user programming for one. >> How do I implement an object model that specifies what objects >> provide direct objects for various verbs? There isn't a one-to-one >> mapping between classes as defined above and direct-object-classes. >> For example, say we have a class liquid_container; now both a >> wineskin and a crystal goblet are liquid_containers. But one >> provides a direct object to "break" and one does not. >> >> Multiple inheritance may provide a solution. That is, I create an >> empty table (class) "fragile" and nestle it under "object". Then >> the goblet inherits both "liquid_container" and "fragile". And if >> someone tries to break it, we look to see if it's a member of >> "fragile" (or "fragile*" if I have subclassed "fragile" in the >> meantime). >> >> I'm worried that this will cause a huge explosion in the number of >> tables, though. Plus an awful lot of ugly special case code in the >> server. > I understand yer concern, but is a 'condition' table (or something > like that) which lists the states an object can be in not the > solution then? I mean, create a table with entries like: > rock, glass, velvet, wood and paper and assign values about the > subject being able to break, torn apart etc... I'd suggest an analogue of Java interfaces would be a much more native approach. There's a fairly decent article in this month's C++ Report (might have been CUJ, but I don't think so and the mags are at home) on implementing interfaces under C++ which is worth reading. > This would eliminate multiple tables and generally provide a good > addition to the MU*. I see horrors when you start to get: volcanic_glass, silicate_glass, pyrex, lead_crytal, etc. -- J C Lawrence Internet: claw#null,net (Contractor) Internet: coder#ibm,net ---------(*) Internet: claw#under,engr.sgi.com ...Honourary Member of Clan McFud -- Teamer's Avenging Monolith... </PRE> <!--X-Body-of-Message-End--> <!--X-MsgBody-End--> <!--X-Follow-Ups--> <HR> <ul compact><li><strong>Follow-Ups</strong>: <ul> <li><strong><A NAME="00678" HREF="msg00678.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong> <ul compact><li><em>From:</em> quzah#geocities,com</li></ul> </UL></LI></UL> <!--X-Follow-Ups-End--> <!--X-References--> <UL><LI><STRONG>References</STRONG>: <UL> <LI><STRONG><A NAME="00259" HREF="msg00259.html">[MUD-Dev] Re: DBMS in MU*'s</A></STRONG> <UL><LI><EM>From:</EM> Jeroen Ruigrok/Asmodai <asmodai#wxs,nl></LI></UL></LI> </UL></LI></UL> <!--X-References-End--> <!--X-BotPNI--> <UL> <LI>Prev by Date: <STRONG><A HREF="msg00667.html">[MUD-Dev] Re: Login and Accounts</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg00669.html">[MUD-Dev] Re: DBMS in MU*'s</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg00259.html">[MUD-Dev] Re: DBMS in MU*'s</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg00678.html">[MUD-Dev] Re: DBMS in MU*'s</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="index.html#00668"><STRONG>Date</STRONG></A></LI> <LI><A HREF="thread.html#00668"><STRONG>Thread</STRONG></A></LI> </UL> </LI> </UL> <!--X-BotPNI-End--> <!--X-User-Footer--> <!--X-User-Footer-End--> <ul><li>Thread context: <BLOCKQUOTE><UL> <LI><STRONG>[MUD-Dev] Re: DBMS in MU*'s</STRONG>, <EM>(continued)</EM> <ul compact> <LI><strong><A NAME="00255" HREF="msg00255.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong>, Adam J. Thornton <a href="mailto:adam#phoenix,Princeton.EDU">adam#phoenix,Princeton.EDU</a>, Sun 19 Jul 1998, 15:28 GMT <UL> <LI><strong><A NAME="00256" HREF="msg00256.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong>, Jeroen Ruigrok/Asmodai <a href="mailto:asmodai#wxs,nl">asmodai#wxs,nl</a>, Sun 19 Jul 1998, 15:46 GMT <UL> <LI><strong><A NAME="00258" HREF="msg00258.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong>, Adam J. Thornton <a href="mailto:adam#phoenix,Princeton.EDU">adam#phoenix,Princeton.EDU</a>, Sun 19 Jul 1998, 17:47 GMT <UL> <LI><strong><A NAME="00259" HREF="msg00259.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong>, Jeroen Ruigrok/Asmodai <a href="mailto:asmodai#wxs,nl">asmodai#wxs,nl</a>, Sun 19 Jul 1998, 18:45 GMT <UL> <LI><strong><A NAME="00668" HREF="msg00668.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong>, J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Tue 11 Aug 1998, 23:14 GMT <UL> <LI><strong><A NAME="00678" HREF="msg00678.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong>, quzah <a href="mailto:quzah#geocities,com">quzah#geocities,com</a>, Wed 12 Aug 1998, 10:55 GMT </LI> </UL> </LI> </UL> </LI> </UL> </LI> </UL> </LI> </UL> </LI> <LI><strong><A NAME="00267" HREF="msg00267.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong>, Ross Nicoll <a href="mailto:rnicoll#lostics,demon.co.uk">rnicoll#lostics,demon.co.uk</a>, Mon 20 Jul 1998, 07:34 GMT </LI> <LI><strong><A NAME="00666" HREF="msg00666.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong>, J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Tue 11 Aug 1998, 22:26 GMT <UL> <LI><strong><A NAME="00675" HREF="msg00675.html">[MUD-Dev] Re: DBMS in MU*'s</A></strong>, Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Wed 12 Aug 1998, 04:26 GMT </LI> </UL> </LI> </ul> </LI> </UL></BLOCKQUOTE> </ul> <hr> <center> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] </center> <hr> </body> </html>