Data structure diagram with ConceptDraw DIAGRAM
Data structure diagram (DSD) is intended for description of conceptual models of data (concepts and connections between them) in the graphic format for more obviousness. Data structure diagram includes entities description, connections between them and obligatory conditions and requirements which connect them.
Data structure diagram is a subspecies of the “entity-relationship” diagram type (ERD).
Entities in data structure diagrams are presented in the form of rectangles or rounded rectangles, and connections between them in the form of arrows. The description of an entity is usually placed inside the rectangle, which denotes the entity. The text description of the entity requirements connecting entities is placed near the line which denotes the connection between entities. The description of connection types between entities (one-to-one, one-to-many, etc.) can be different in different notations and differs with the arrow type on the line of connection between entities. The most famous are notations of DeMarco, Jackson and Yourdon.
DSD also used for hierarchical presentation of the complicated entity. Such data structure diagram is usually created in the result of entity decomposition to the set level of detailed elaboration and presented as a tree.
The difference of the data structure diagram from the “entity- relationship” diagram is that DSD more completely defines connections and relations between elements of entities whereas ERD defines connections between entities.
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Structured-systems analysis and design method uses data flow diagrams to represent the process of data flowing through a system. Talking about this might be useless without a proper example of DFD for online store (Data Flow Diagram). This DFD example shows all the distinctness that a diagram can bring into a scattered data structure.
Data flow diagrams are used to show how data is processed within some business processes. Making DFD is a common practice for business process modeling and analysis. This diagram represents the online store business flow. It describes inputs and outputs within online selling process and depicts the interactions between its participants. This DF diagram can be used by system analysts to create an overview of a business, to study and discover its inherent strengths and weak points.
Picture: Example of DFD for Online Store (Data Flow Diagram)
This sample shows the Flowchart that displays the architecture of SQL Exception Translation.
This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Flowcharts solution from the Diagrams area of ConceptDraw Solution Park.
Picture: Sample Project Flowchart. Flowchart Examples
The first thing that usually comes to mind when talking about database models is ER-diagrams, and the ways to create them. The second most recognizable notation is the Crow’s Foot, which visually differs from Chen’s notation. Actually, it doesn’t matter which notation you’ll use for your entity relationship diagram (ERD), but the content is what matters.
When designing an Entity-Relationship Diagram one need to use a certain notated symbols that were developed and standardized especially for databases description. First of them - the Chen’s notation had a linguistic origin. It includes rectangle boxes to show entities that may be described as nouns, and the relationships between them described as verbs depicted in a form of diamond. Finally the Chen’s notation was simplified up to the Crow’s Foot notation. It represents a relationship as labeled line. It is precisely this notation is shown in the given figure. ConceptDraw DIAGRAM together with its Entity-Relationship Diagram (ERD) solution is designed to support professionals who deals with creating ER diagrams using the element of both - Chen’s and Crow's Foot notations.
Picture: Design Element: Crows Foot for Entity Relationship Diagram - ERD
ConceptDraw DIAGRAM extended with IDEF Business Process Diagrams solution from the Business Processes area of ConceptDraw Solution Park is an ideal software for effective database design and drawing IDEF diagrams visually representing all steps of database design process.
Picture: Database Design
Data Flow Diagram is used to depict the flow of data through the system, where it enters and exits the system, as well as where it is stored. To simplify the process of drawing a data flow diagram (DFD), ConceptDraw DIAGRAM provides a DFD Library - design elements that will help you make your diagram as informative, streamlined and understandable as possible. Data flow diagrams are useful to create a general overview of the system or to document major data flows.
Here are the library of symbols used in data flow diagrams (DFD). Data Flow diagrams are graphic means of business process visualization. Any business process may involve the data transfer. It can be easily shown using data flow diagrams. DFDs are used to represent the processing and transformation of data within a business process. One can find out the Vector library of DFD symbols, that is a component of ConceptDraw solution for Data Flow Diagramming and is welcome to use in as addition to the common Conceptdraw DIAGRAM diagramming facilities.
Picture: DFD Library — Design elements
Two types of diagrams are used in UML: Structure Diagrams and Behavior Diagrams. Behavior Diagrams represent the processes proceeding in a modeled environment. Structure Diagrams represent the elements that compose the system.
Picture: UML Diagram Types List