Page 201 - DCAP312_WEB_TECHNOLOGIES_II

Unit 9: The Database Model

data model must be hierarchical in nature, diagramming the assembly at the top with Notes
subassembly, part, and subpart at successive lower levels.
• Hierarchical data model represents well any business data that inherently contains levels
one below the other.

• Hierarchical or the network data models, the relational model establishes relationships
between data structures by means of foreign keys and not by physical pointers.

• User interface (UI) forms are essential in capturing data requirements; UI prototype can
be used by the developer as a source for developing the classes and objects.

• Once the system is built, the system information will be stored in the system database.
• Database Factory is responsible for transformation of generated structures to the equivalent
model in a database

• The XForm document maintains the design and the logic of the form as a standard relation
between Design and Development phase

9.9 Keywords

Database: It is an ordered collection of related data elements intended to meet the information
needs of an organization and designed to be shared by multiple users.

Hierarchical Data Model: Represents well any business data that inherently contains levels one
below the other.

Network Data Model: It is more representative of real-world information requirements than
the hierarchical model.
Parser: May need to establish a connection to the database to get some information about the
sub forms or sibling forms and use them to generate the code.
Physical Pointers Link: It occurrences of an owner record type with the corresponding
occurrences of the member record type.
Related Data Elements: The data elements in a database are not disjointed structures without
any relationships among them.
Relation: It is a two-dimensional table of data observing relational rules.
User Interface (UI): Forms are essential in capturing data requirements, UI prototype can be
used by the developer as a source for developing the classes and objects.
User Interface Oriented Application Development, UIOAD: Previous related works based on
similar concepts have been brain-stormed and user interface driven system design has been
proposed.

Validation: In addition to the user interface code, some auxiliary-codes maybe needed to control/
validate the input data like by injecting javascript control codes into the HTML forms.

XForms: It format and then regenerates the user interface for the target platform from the logic
and the user interface design information.

1. Construct Lookup of messages sent to self starts in the class of the receiver.

2. Create a basic object model which follows all the rules.

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