Class Diagram From The Unified Modeling Language ( Uml )

This is a pictorial representation of the real world problem in terms of entities (which have attributes) and relations between the entities is referred to as ER diagram.

* As explained throughout this course, entity relationship modeling is a critical element of database design. If the database is not properly modeled, it is unlikely that the database will be properly developed. Using this knowledge, explain the key reasons why entity relationship modeling is important, and determine at least (1) way in which it impacts the overall development of the database.

UML Composite Structure Diagram is a type of Structure Diagrams that shows the internal structure of a class and the interactions of elements of the internal structure of the class.

According to Kroenke and Auer (2010) there is an ERD standard, albeit very loosely practiced. The diagrams use combinations of rectangles and diamonds. Entity classes are shown using rectangles, relationships are shown using diamonds, the maximum cardinality of the relationship is shown inside the diamond, and the minimum cardinality is shown by the oval or hash mark next to the entity. The name of the entity is shown inside the rectangle and the name of the relationship is shown near the diamond.

The ERD represents conceptualization by end users of what the database has to offer. As a database designer, it is important for you to use the ERD tool so the components, attributes, entities and relationships are clearly visible. The ERD tool will held database designers make sure they are capturing all required data and that all tables needed are built around that data.

Activity diagrams are graphical representations of workflows of stepwise activities and actions with support for choice, iteration and concurrency. In the Unified Modeling Language, activity diagrams are intended to model both computational and organizational processes (i.e. workflows). Activity diagrams show the overall flow of control.

In the object-oriented modelling class diagrams are very important. In data modelling techniques class diagrams are used. These class diagrams are represented by using the box symbol.

If I should just do the programming, I will choose to make use of Pseudocodes. Nevertheless, I love coding, and I want you to, visually, understand what is going to be done. In addition, I want you to see the result. Therefore, in this assignment, I will be making use of both the Flowchart and Pseudocode Conceptual models. Thereafter I will produce the Calculator and you can even use it.

2. A flow diagram – ensuring that each process has enough description for the apprentices to understand what is happening.

These models are used to design the internal schema of a database, represent the data tables, the data columns of those tables, and the relationships between the tables. The physical data model shows the technical details for implementation as a database or data structure. This model also represents a way in which data is physically stored.

A ____________________ typically includes a data flow diagram to describe the flow of information for a

In order to solve the programming problem that we are facing, we need to define the flow of the program and the actions that the program must take. Attempting to write a successful program without considering how to solve the problem and how the program must be created makes the task very difficult for the programmer. This is where flowcharts or pseudocode will help us build a conceptual model of how a program will work before we get into the complexity of the programming language.

* Imagine that you have been working on a project to design and build a given system. You have completed the elicitation and evaluation phases and now you need to specify and document the system-to-be. Suppose you have decided to use diagrammatic notations for the specification and documentation. Your options are to use context diagrams or frame diagrams. Evaluate each type of diagram and select the one you feel is the best fit. Provide a rationale.

Data Flow Modelling – This is the process of modelling and recording how data flows around a system. A Data Flow Model is made up of connected Data Flow Diagrams (DFD) which are supported by appropriate documentation. DFDs represent the processes and functions within a system (activates that transform data from one form to another), data stores (file storage, external entities (things that send data into a system or receive data from a system) and finally data flows (show the flow of data around the system).

We can also generate codes in various languages using UML diagrams. UML has relation with object oriented analysis and design later it becomes an object management group. UML diagrams are used to model