A Reminder: if you want to start a new discussion thread, please don't start it as a reply to an unrelated thread. It makes conversations hard to find and follow ;-)<br><br><br><div class="gmail_quote">On 22 November 2010 09:38, Townsley, Andrew A <span dir="ltr"><<a href="mailto:townsley.andrew.a@edumail.vic.gov.au">townsley.andrew.a@edumail.vic.gov.au</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">In the new book what are the questions at the end of Ch1?<br>
I have the old book and want students to complete the questions for Ch1 but I am not sure if they are the same as the old book?<br>
<br>
<br>
A.Townsley<br>
<a href="mailto:townsley.andrew.a@edumail.vic.gov.au">townsley.andrew.a@edumail.vic.gov.au</a><br>
Fountain Gate SC<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:itapps-bounces@edulists.com.au">itapps-bounces@edulists.com.au</a> on behalf of Mark KELLY<br>
Sent: Mon 22/11/2010 9:23 AM<br>
To: Year 12 IT Applications Teachers' Mailing List<br>
Subject: [Year 12 IT Apps] Logical and physical data dictionaries<br>
<br>
Hi all. I've flipped and flopped over the years about whether I thought<br>
data dictionaries were logical or physical design tools. On one page on my<br>
Lecture Notes I had them as logical, on another page they were physical. Now<br>
I've a sneaking suspicion that *both* are right: there are logical data<br>
dictionaries and physical data dictionaries...<br>
<br>
To quote<br>
<a href="http://www.modernanalyst.com/Careers/InterviewQuestions/tabid/128/articleType/ArticleView/articleId/1392/categoryId/45/What-is-a-logical-data-dictionary-and-what-are-the-benefits-of-maintaining-one.aspx" target="_blank">http://www.modernanalyst.com/Careers/InterviewQuestions/tabid/128/articleType/ArticleView/articleId/1392/categoryId/45/What-is-a-logical-data-dictionary-and-what-are-the-benefits-of-maintaining-one.aspx</a><br>
<br>
*"At a logical level, the business representative cares about questions such<br>
as:<br>
<br>
What is a Sales Contract?<br>
What are the primary elements of a Sales Contract?<br>
Do these primary elements have attributes or data of their own?<br>
How does a Sales Contract relate to other relevant business entities?<br>
<br>
Once data has been logically defined, the definition and relationships<br>
between various pieces of logical data rarely need to change.<br>
In contrast, a physical data dictionary allows an organization to describe<br>
data in terms of its physical data structure, type, format, and length.<br>
Physical data dictionaries provide programmers of many different systems<br>
with a tool to understand how and where the data is stored and how it must<br>
be referenced in order to consume it."*<br>
<br>
Has anyone else discovered these 2 varieties of data dictionaries?<br>
<br>
--<br>
Mark Kelly<br><br></blockquote></div><br clear="all"><br>-- <br>Mark Kelly<br>Moderator: IT Applications Edulist<br><br><br><br>