05_Building Presentation Layer

7/29/2019 05_Building Presentation Layer

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Building the Presentation Layer

of a Re ositor

Copyright 2012, Oracle and/or its affiliates. All rights reserved.


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Objectives

After completing this lesson, you should be able to:

Identify the objects in the Presentation layer of a repository

Modify the properties of Presentation layer objects

Build the Presentation layer of a repository

Copyright 2012, Oracle and/or its affiliates. All rights reserved.5 - 2


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Presentation Layer

Provides a way to present a customized view of a business

model to users

Exposes only the data that is meaningful to users

Organizes the data in a way that aligns with the way users

think about the data


enames a a as necessary or e se o users


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Subject Areas

Organize and simplify the business model for a set of users:

A single subject area must be populated with content from

a single business model . It cannot span business models.

Multiple subject areas can reference the same business

model.


Subject area for

user group 1

Subject area for

user group 2

Both subject areas

reference the same

business model.


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Presentation Tables

Organize presentation columns into categories that make

sense to users

May contain columns from one or more logical tables

Can be modified independently of logical tables

Can be created:


Automatically by dragging logical tables from the BMM layer Manually in the Presentation layer

Presentation

tables


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Presentation Columns

Define the columns that are used to build analyses in the

Oracle BI user interface

Map to logical columns in the BMM layer

Can be created:

Automatically by dragging logical tables or columns from the


Manually in the Presentation layer

Presentation

columns


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Presentation Layer Mappings

Presentation layer objects map to objects in the Business

Model and Mapping layer.

Subject areas map to


e us ness mo e .

Presentation tables may

map to logical tables.

Presentation columnsmap to logical columns.


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Defining the User Interface

in the Presentation Layer

Presentation layer objects define the interface that users see to

query data from the data sources.

Subject area


Presentationtable

Presentation

column

Subject area

Folder

Column


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Nesting Presentation Tables

To give the appearance of nested folders:

1. Prefix the name of the presentation folder to be nested

with a hyphen and a space.

2. Place it after the folder in which it nests.


Folders nested under Facts folder Hyphen and space omitted in UI


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Aliases

Keep track of changes to Presentation layer objects.

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Prior names

Add or delete

aliases.


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ABC Example

Build the Presentation layer to present users with a customized

view of ABCs data.



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Implementation Steps

1. Create a new subject area.

2. Rename tables.

3. Reorder tables.

4. Delete columns.

5. Rename columns.


6. Reorder columns.


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1. Create a New Subject Area

Drag the SupplierSales business model from the Business

Model and Mapping layer to the Presentation layer to

automatically create Presentation layer objects.

Business model becomes


subject area.

Logical tables become

presentation tables.

Logical columns become

presentation columns.


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2. Rename Tables

To rename tables in the Presentation layer, use any of the

following methods:

Use the General tab in the properties dialog box.

Right-click a table and select Rename.

Highlight a table to make the name editable, and then


en er a new name.

Use the Rename Wizard.

Double-click.

Rename.


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3. Reorder Tables

To reorder tables, open the Subject Area properties box.

Then use the Up and Down buttons, or simply drag the tables.

Double-click.



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4. Delete Columns

Delete unnecessary columns to simplify the content and make

it more understandable to users.

Remove.


Double-click.

Select columns.


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5. Rename Columns

Presentation columns use the logical column name by

default.

On the General tab in the column properties dialog box,deselect the Use Logical Column Name check box and

enter a custom name.


Custom name

Deselect to create a custom name.


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6. Reorder Columns

To reorder columns, open the Presentation Table properties

box. Then use the Up and Down buttons, or simply drag the

columns.


Select and move a column

or group of columns.


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Considerations

Subject areas can map to only one business model.

Multiple subject areas can map to the same business

model.

Presentation columns can come from multiple logical

tables in a business model.


en e se og ca o umn ame c ec ox s

selected, presentation columns are automatically renamed

when the corresponding logical object is renamed.

Presentation tables cannot have the same names as the

subject areas. Presentation objects can be modified or deleted without

affecting corresponding logical objects.


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Design Tips

Use meaningful names.

Names cannot contain single quotation marks (); the

Administration Tool prevents it. Although permitted, avoid using double quotation marks ().

Keep presentation object names unique:


presentation tables can lead to inaccurate results.

Uniqueness allows SQL statements to be shorterbecause qualifiers are unnecessary.

Group objects in meaningful ways.

Eliminate unnecessary objects to reduce confusion.

Use object description fields to convey information to users.

Keep names short to save space on reports.


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Summary

In this lesson, you should have learned how to:

Identify the objects in the Presentation layer of a repository

Modify the properties of Presentation layer objects

Build the Presentation layer of a repository


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05_Building Presentation Layer