Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
IBM Cognos 10 Framework Manager

You're reading from   IBM Cognos 10 Framework Manager Full of practical instructions and expert know-how, this book continues where the official manual ends, taking you from the basics into the more advanced features of IBM Cognos Framework Manager in clear, progressive steps.

Arrow left icon
Product type Paperback
Published in May 2013
Publisher Packt
ISBN-13 9781849685764
Length 186 pages
Edition 1st Edition
Arrow right icon
Author (1):
Arrow left icon
Terence Phillip Curran Terence Phillip Curran
Author Profile Icon Terence Phillip Curran
Terence Phillip Curran
Arrow right icon
View More author details
Toc

Table of Contents (19) Chapters Close

Modeling layers


One of the basic principles of a good model design is to divide the model into a series of layers, each layer having a specific function within the model and a related set of modeling activities.

Originally IBM Cognos recommended the use of two layers, a data layer and a modeling layer. This was later refined by the inclusion of a Presentation layer, and a separate Dimensional layer if the Dimensional Modeled Relational (DMR) data is also used in the model.

The layers are built upon one another, with the lowest level being the data layer, the modeling layer as the middle layer, and the top layer being the presentation layer. The dimensional layer can be used to replace the presentation layer, or can be used in addition to the presentation layer.

Data layer

The data layer, also called the import layer, or the physical layer, contains the data source query subjects. This is directly based on the underlying database objects.

In order to retrieve the table information, you should...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime