Schemas Integration - Information Systems Reengineering, Integration and Normalization - page 280

6FKHPD;

6FKHPD$
$

6FKHPD%
%

&ODVV [

;

$WWU
$WWU

&ODVV [ &ODVV \

!

$WWU
$WWU

$WWU
$WWU

&ODVV \

;

$WWU

Fig. 7.18 Merge classes by subtype class

7.3.2 Frame Model Metadata Implementation

Header class

Class name Parents Primary key Operation Class type

X 0 A 1 Static

Y 0 A 3 Static

Attribute class

Attribute
name

Class name Method_

Name

Attribute
type

Default
value

Cardinality Description

A 1 X String Attribute

A 2 X String, Y 1 Pointer to Y

A 3 Y String, X N Attribute, Pointer

to X

A 4 Y String Attribute

Substep 2.2. Merge Classes by Subtype
The integration can be based on the subtype relationship between two classes and
which can be specified in the Parent attribute of the Header class in the frame model
metadata (Fig. 7.18 ).