[Year 12 SofDev] Validation naming

[John Schwartz]

I have also always used Existence to mean Null testing but concede the double meaning. For things like medicare numbers, however, wouldn't you generally use a check digit rather than a range?
 
John

John Schwartz
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________________________________

From: Mark KELLY [mailto:kel at mckinnonsc.vic.edu.au]
Sent: Tue 14/12/2010 11:59 AM
To: Year 12 Software Development Teachers' Mailing List
Subject: [Year 12 SofDev] Validation naming


Hi campers.  A little audience participation question. Validation types in the study design are:


*	existence checking 
*	range checking 
*	type checking

The 2010 SD exam <http:///postmortems/2010sd/SD2010exam.htm#c4>  decided to muddy the waters by describing these validation tests:

Existence - to make sure that the number entered exists on Medicare's database
Null - to make sure something has been entered

Now, I've always read "existence" as "has a value been entered?" (like "Null" in the exam question).

How many of you good folk refer to existence testing as "existence in a limited list", and how many would equate existence testing as null testing?

If you agree that the exam's terminology is unconventional, I am a bit concerned about it being used in an exam where it could confuse students who were taught the conventional interpretation.

Now I'm even doubtful about what the study design means by "existence checking" - does it mean "null checking"?

Have a happy winding-down time, if you're luck enough to have one!

-- 
Mark Kelly
ICT Manager
Reporting Manager
IT Learning Area Manager

McKinnon Secondary College
McKinnon Rd McKinnon 3204
Victoria, Australia
Direct line / Voicemail: +613 8520 9085
Fax +613 9578 9253
kel at mckinnonsc.vic.edu.au

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