Olinux, > Haven't been following and not sure if this is what > you're after, but these are some great data models: > http://www.databaseanswers.com/data_models/index.htm
Thanks for this. I came across this site/these diagrams before, but thought them to be too 'introductory' and vague for use 'in anger', and without commentary not particularly useful as a tutorial (unless one is really determined) Unfortunately they [that I looked at again today] are also in the form of ERDs (entity relationship diagrams) rather than ELH diagrams (which we had been discussing). So I Googled "entity life history" and diagram... The first hit took me to SmartDraw.com. Their site was good because it shows examples of different types of diagrams, but it is all academic-theoretical/no worked real-life examples. Poking around the site (or duh! using the second Google hit) I did find a fairly simple worked example of an ELH diagram. Tim: these guys are pushing SSADM, a British government initiative from 15-20 years back (no less valid for its age). You (and others in the States) may or may not find it easy to get hold of SSADM stuff, simply because it didn't become popular in the States. A bit further down, Google offers http://www.cscs.wmin.ac.uk/~ssadm/elh/elhs.html which is a lecture from the University of Westminster and part of the/an SSADM organisation's site. It has the sort of worked-descriptions that I mentioned (to Tim) earlier. Rumbling around on their site will also enable the study of other useful design tool/method tutorials - and may save/justify a trip to the library! Regards, =dn -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
