An Object-Oriented Approach to Conceptual Hypermedia Modeling

Optimal Information Modeling Techniques ◽

10.4018/978-1-931777-09-4.ch004 ◽

2011 ◽

pp. 41-54

Author(s):

Wilfried Lemahieu

Keyword(s):

Data Model ◽

Object Oriented ◽

Implementation Framework ◽

Object Oriented Approach ◽

Entity Relationship ◽

Oriented Approach

This chapter introduces the MESH approach to hypermedia modeling and navigation, which aims at relieving the typical drawbacks of poor maintainability and user disorientation. The main focus is upon the data model, which combines established entity-relationship and object-oriented abstractions with proprietary concepts into a formal hypermedia data model. Uniform layout and link typing specifications can be attributed and inherited in a static node typing hierarchy, whereas both nodes and links can be submitted dynamically to multiple complementary classifications. In addition, the data model’s support for a context-based navigation paradigm, as well as a platform-independent implementation framework, are briefly discussed.

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Object-Relational Modeling

Handbook of Research on Innovations in Database Technologies and Applications ◽

10.4018/978-1-60566-242-8.ch019 ◽

2009 ◽

pp. 162-170

Author(s):

Jaroslav Zendulka

Keyword(s):

Relational Database ◽

Relational Databases ◽

Conceptual Modeling ◽

Object Oriented ◽

Database Systems ◽

Object Relational ◽

The Difference ◽

Object Oriented Approach ◽

Entity Relationship ◽

Oriented Approach

Modeling techniques play an important role in the development of database applications. Well-known entity-relationship modeling and its extensions have become a widely-accepted approach for relational database conceptual design. An object-oriented approach has brought a new view of conceptual modeling. A class as a fundamental concept of the object-oriented approach encapsulates both data and behavior, whereas traditional relational databases are able to store only data. In the early 1990s, the difference between the relational and object-oriented (OO) technologies, which were, and are still used together to build complex software systems, was labeled the object-relational impedance mismatch (Ambler, 2003). The object-oriented approach and the need of new application areas to store complex data have greatly influenced database technology since that time. Besides appearance of object-oriented database systems, which fully implement objectoriented paradigm in a database environment (Catell et al., 2003), traditional relational database management systems become object-relational (Stonebraker & Brown, 1999). The most recent versions of the SQL standard, SQL: 1999 (Melton & Simon (2001) and SQL: 2003 (Eisenberg et al., 2004), introduced object-relational features to the standard and leading database producers have already released packages which incorporate them.

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