tag:blogger.com,1999:blog-6411920579549337139.post2796681343290745368..comments2023-12-31T05:26:17.608-08:00Comments on DATABASE DEBUNKINGS: This WeekFabian Pascalhttp://www.blogger.com/profile/01346669716885494092noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-6411920579549337139.post-2269451363909147042017-11-05T11:46:49.804-08:002017-11-05T11:46:49.804-08:00Well, later in the comment he sort of calls it a d...Well, later in the comment he sort of calls it a data model, although a limited one.<br /><br />Actually, as you shall see, I don't agree "it is not clear" -- it is quite clear.Fabian Pascalhttps://www.blogger.com/profile/01346669716885494092noreply@blogger.comtag:blogger.com,1999:blog-6411920579549337139.post-73255206264231724192017-11-05T11:37:28.281-08:002017-11-05T11:37:28.281-08:00"ERM is a data model -- So says Date, Chen, e..."ERM is a data model -- So says Date, Chen, etc. So says the majority of current industry experts. Refer to Date 6th edition p347"<br /><br />8th edition, p. 426 : "it is not even clear that the E/R "model" is truly a data model at all, at least in the sense in which we have been using that term in this book so far (i.e. as a ***formal*** system involving structural, ***integrity and manipulative*** aspects)".<br /><br />And I seriously doubt he has ever been saying anything fundamentally different, including in earlier editions. Of course some might miss the understatement in "it is not even clear".Erwin Smouthttps://www.blogger.com/profile/17463579744642559811noreply@blogger.com