From: Philip Lijnzaad Subject: Re: Database Design and Modelling Date: 2000/05/05 Message-ID: #1/1 References: <33fQ4.11191$v85.74072@news-server.bigpond.net.au> X-Complaints-To: news@net.bio.net X-Trace: niobium.hgmp.mrc.ac.uk 957513421 28075 193.62.196.201 (5 May 2000 07:57:01 GMT) Organization: EMBL Outstation Hinxton - European Bioinformatics Institute, UK NNTP-Posting-Date: 5 May 2000 07:57:01 GMT Newsgroups: comp.databases.theory > Hi, > I was just wondering if ER Diagrams are still are good way yes, I think so. > (the best) certainly not the worst. Advantage over UML is that it's simpler and stabler. Disadvantage is that it's less expressive. > of modelling relational databases. (incidentally and ideally, you model your data, not your database. The latter implies an implementation) > Are there any new diagrams or methodologies now, maybe UML yes ... > (which diagrams) I vote for class diagrams, assocations etc. Simply don't use methods and sub-classes, and use aggregate assocations instead of weak entities and I think you got the essentials. Cheers, Philip -- /dev/brain/lost+found: File not found ----------------------------------------------------------------------------- Philip Lijnzaad, lijnzaad@ebi.ac.uk | European Bioinformatics Institute,rm A2-24 +44 (0)1223 49 4639 | Wellcome Trust Genome Campus, Hinxton +44 (0)1223 49 4468 (fax) | Cambridgeshire CB10 1SD, GREAT BRITAIN PGP fingerprint: E1 03 BF 80 94 61 B6 FC 50 3D 1F 64 40 75 FB 53