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1Select 7RROV*HQHUDWH 3K\VLFDO 'DWD 0RGHO.

The PDM Generation Options dialog box appears.

2Select 6\EDVH $6 $Q\ZKHUH from the DBMS dropdown listbox.

The dialog box proposes TUTORIAL as the default name for the PDM file. It is the same as the CDM file name but with the extension .PDM.

3Select the 6KDUH radio button.

You indicate to use the DBMS definition file stored in the DBMS library.

4Click the 'HWDLO tab.

The Detail page appears.

5Select or clear the following options:

 

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Options

 

Check model

 

 

 

Save generation dependencies

CDM Getting Started

 

 

 

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The model will be verified by the Check Model before generation. The Save Generation Dependencies option determines that PowerDesigner saves the object identification tag for each object in the model. This option is mainly useful when merging two PDM generated from the same CDM.

6Select the 6HOHFWLRQ tab.

The 6HOHFWLRQ page appears. It lists all the objects in the CDM. By default, all object checkboxes are selected.

7If all the object checkboxes are not selected, click the Select All tool.

8Click 2..

A Result List window displays warning messages indicating that the CDM reuses certain data items for more than one entity. These warnings are informational and do not prevent PowerDesigner from generating the PDM.

9Close the 5HVXOW window when the generation process has finished.

 

PowerDesigner

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The PDM appears in the model window.

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If your PDM is difficult to read because tables display too much information, you can reduce the amount of information displayed by selecting ToolsDisplay Preferences and clearing checkboxes for the appropriate object.

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In the CDM, you defined the inheritance Title Inherit to generate the parent only. In the PDM, the resulting table, Title, includes a column, Periodical, that indicates if a title is a periodical or not. It also includes columns related to periodicals or non periodicals.

What you learned In this section, you learned how to:

Define generation parameters according to how you want to generate objects in the PDM

Generate a PDM from a CDM

CDM Getting Started

 

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You will save the generated PDM.

1Select )LOH6DYH $V from the menu bar. The File Save As dialog box appears.

2Type *(178725 3'0 in the File Name box. This is the new name for the generated PDM file.

3Click 2..

This saves your model in the GENTUTOR.PDM file.

4Select )LOH&ORVH from the menu bar.

This closes the PDM window and returns you to the CDM window.

 

PowerDesigner

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You will save and close the CDM, then exit PowerDesigner.

1Select )LOH6DYH. This saves the CDM.

2Select )LOH &ORVH. This closes the model.

3Select )LOH([LW.

A confirmation box asks you if you want to save the Workspace.

4Click the 1R button.

You exit the PowerDesigner application. You have now completed the CDM tutorial.

CDM Getting Started

 

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PowerDesigner

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association

business rule

column

Conceptual Data

Model (CDM)

constraint

data item

domain

entity

entity attribute

foreign key

Identifier

Inheritance

Physical Data

Model (PDM)

primary key

property sheet

reference

CDM Getting Started

In the Merise modeling methodology an association is a connection between entities

Written statement specifying what the information system must do or how it must be structured to support business needs

Data structure that contains an individual data item within a row in a PDM

Entity-relationship diagram that models the information system without considering the details of physical implementation

Named check that enforces data requirements, default values, or referential integrity on an entity or a entity attribute

Elementary piece of information

Set of values for which a data item is valid

Person, place, thing, or concept that has characteristics of interest to the enterprise and about which you want to store information

Elementary piece of information attached to an entity

Column or columns in a PDM whose values depend on and migrate from a primary key, or an alternate key, in another table

Entity attribute, or a combination of entity attributes, whose values uniquely identify each occurrence of the entity

Special relationship that defines an entity as a special case of a more general entity

Table-reference diagram that models the information system including the details of physical implementation

Column or columns whose values uniquely identify a row in a table in PDM

Window that displays the properties of an object

Link between a parent table and a child table in a PDM. A reference can link tables by shared keys or by specified columns

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referential integrity

relationship table

Rules governing data consistency, specifically the relationships among primary keys and foreign keys of different tables in a PDM

Named connection or association between entities

Collection of rows (records) in a PDM that have associated columns (fields)

PowerDesigner

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object to package

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domain

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child

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parent

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create

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palette

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close

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generate

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generate from CDM 91

save

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PowerDesigner application 8

PowerDesigner

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