OODM-object oriented data model

OODM-object oriented data model

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  OBJECT ORIENTEDOBJECT ORIENTED DATAMODELDATA MODEL Presented by:Presented by: Anil PokhrelAnil Pokhrel Csit 4 semCsit 4 sem College of applied businessCollege of applied business
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  ContentsContents Basic concept Types ofOBDM Features of OODM Examples Advantages and disadvantages Conclusion
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  Basic conceptBasic concept AnObject-Oriented Data Model (OODM) has been defined for logical database design and database access The OODM accommodates three types of relationship – aggregation, generalisation and particularisation It provides four types of data operations defining schema, creating database, retrieving objects and expanding objects
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  Continue…..Continue…..  In object orienteddata model both data and their relationship are contained in a single structure known as object  An object include information about the relationship between the facts within the objects as well as information about Its relationship with other objects
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  Types of objectbased dataTypes of object based data ModelsModels  Entity Relationship Model ER data model is one of the important data model which forms the basis for the all the designs in the database world  Object oriented data model Object oriented data model, along with the mapping between the entities, describes the state of each entity and the tasks performed by them
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  Features of OODMFeaturesof OODM  The OODM supports a structured menu-based interface which allows a user to define the schema and retrieve from the database without any knowledge of the OODM  An important feature of this interface is that menu information is modelled as a set of interrelated objects stored in the database
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  Object identityObject identity  Itprovide unique iddentity to each independent object stored in database  This unique iddentity is implemented via a unique system generated object iddentifier
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  AbstractionAbstraction  It is theprocess of iddentifying the essential aspects of an entity and ignoring the unimportant properties  It has two fundamentals  Encapsulation  Data hiding
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  ClassClass Used to definethe set of similar object Object with the similar attribute and message are group together to form the class
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  InheritenceInheritence
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  AdvantagesAdvantages  Because of itsinheritance property, we can re-use the attributes and functionalities  It reduces the cost of maintaining the same data multiple times  Also, these informations are encapsulated and, there is no fear being misused by other objects
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   Hence it reducesthe overhead and maintenance costs  Because of the above feature, it becomes more flexible in the case of any changes  Since each class binds its attributes and its functionality, it is same as representing the real world object
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  ConclusionConclusion  Menus can becreated, accessed and updated in the same way as data  Furthermore, a basic set of menus is generated from the database schema and made available to the user for the purpose of answering simple queries  A prototype of the OODM has been implemented and used to model an application domain
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  RefferencesRefferences https://academic.oup.com/comjnl/article/31/ 2/116/352255 https://www.tutorialcup.com/dbms/object- based-data-models.htm
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  Thank you Any queries