[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: The real world doesn't have an "other xyz", neithershould
On Sun, Feb 9, 2014 at 2:27 PM, Costello, Roger L. <costello@mitre.org> wrote: > Hi Folks, > > I see many XML instances (and corresponding XML Schemas) with an "other" catchall element. > > I wish to convince you that an "other" catchall element is contrary to one's objectives and should be avoided. > > First, a quote from the book, "Principles of Program Design" (Jackson Design Methodology): > > The structure of a program must be > based on the structures of all the data > it processes. > > A corollary to that is: > > Data should model the real world. > > So there is this deep connection: > > real world --> data model --> program structure > > In the real world there is no "other" component: When was the last time you drove an "other car" or purchased an "other vegetable"? > > So it is wrong to create a data model for a nonexistent real world entity. Likewise it is wrong to write a program component for "other" data. > This is the point where you should read something like http://www.amazon.com/Understanding-Uncertainty-Dennis-V-Lindley/dp/0470043830/ref=cm_cr_pr_product_top
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] |
PURCHASE STYLUS STUDIO ONLINE TODAY!Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced! Download The World's Best XML IDE!Accelerate XML development with our award-winning XML IDE - Download a free trial today! Subscribe in XML format
|