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MyDraw is an advanced diagramming software for drawing flowcharts, org charts, mind maps, network diagrams, floor plans, UML diagrams and business diagrams. The main reason SmartDraw is our choice at the top flowchart maker for Mac is. Our program is an all-in-one diagram solution for Windows, Mac and Linux. With it, you can easily create diagrams, presentations, charts and graphs, cards, vector graphics, forms, fashion designs, floor plans, infographics, engineering graphic documents and more. It supports more than 260 drawing types.
DIAGRAM 13
Entity Relationship Model
One of the most popular semantic data models is the 'entity-relationship' model (often called ER-model). Most of the modern approaches to the database (mainly relational) design are based on the usage of different versions of ER- model. The model was proposed by Peter Chen in 1976. Domain modeling is based on the use of graphic charts, including a small number of heterogeneous components. The simplicity and the presentation clarity of the conceptual basis of these ER-model schemes led to its widespread deployment in the CASE-systems that support automatic design of relational databases.
The basic concepts of ER-models are the entity, the relation and attribute. An entity is a real or abstract object, information about which should be kept and be available. The entity in an ER-model diagram is represented by a rectangle containing the name of the entity. In this case, the name of the entity is not a particular instance of this entity, but a label for the whole entity. Although it would be more correct to use such terms as ‘an entity type’ and ‘an instance of the entity type’ to avoid verbosity, in cases where it does not lead to ambiguity, the term “entity” is used in the meaning of the entity type. For instance, let’s think of an entity named “airport”. In this case, “airport” is the entity type, and “Heathrow” or “Charles de Gaulle” are the instances of this entity.
A relation is a graphically depicted association between two entities. As well as the entity, a relation is a typical concept, all instances of the linked entity types are subject to the rules established by the connecting. Therefore, it is more correct to speak about the relationship type made between types of entities and about the instances of relationship types made between instances of the entity type. In common ER-model this association is always binary and can exist between two different entity types or can be recursive.
Design elements Peter Chen and Crow's Foot notation
ConceptDraw DIAGRAM is a famous Entity Relationship Diagram software for MacOS which gives the ability to describe visually the databases using the Chen’s notation icons and Crow’s Foot notation icons for drawing ER diagram (ERD).
Example 1. Entity Relationship Diagram Software for Mac
ConceptDraw DIAGRAM was developed especially for a reason of providing the convenience for macOS operating system, designed and created especially for Mac users. The difference between this application, comparing to the other Visio alternatives, which are also suitable for Mac, is that it offers to use the pre-made solutions, available both on this site and in another application, developed by the CS Odessa team of IT specialists — ConceptDraw STORE. Having ConceptDraw DIAGRAM drawing software means having an opportunity to create great looking as well as smart ERD diagrams, as this application provides all of the necessary tools to have the drawings done within only a couple of hours or even minutes, depending on how familiar you are already with this software.
![Diagramming Program For Mac Diagramming Program For Mac](/uploads/1/2/4/3/124395079/195231309.png)
Thus, once you have to create some ER-model, showing the entities, the relations between them as well as the attributes, then the best option for such drawings would be using ConceptDraw DIAGRAM which is very popular among software engineers being used for different purposes. Downloading this Entity Relationship Diagram software for Mac OSX allows you to describe any needed databases visually using the Chen’s notation icons as well as Crow’s Foot one’s icons in order to create the very professionally looking ER diagrams (ERDs) as this is a very good alternative of MS Visio for Mac.
Example 2. ERD Symbols — Chen's Notation
The Entity-Relationship Diagram (ERD) solution can be downloaded from this site or from ConceptDraw STORE application, enabling you to use both stencil libraries containing all together 45 vector graphic symbols, which will be useful in creating the needed ER diagram. Get it today to have the smart looking result already by tomorrow.
Example 3. Entity Relationship Diagrams solution
Use unique ConceptDraw DIAGRAM diagramming and vector drawing software enhanced with Entity-Relationship Diagram (ERD) solution to draw ER diagrams using Chen's or Crow's Foot notations on your Macintosh computers.
No other Entity Relationship Diagrams software gives you all this:
- Design and document using a wide range of pre-drawn erd shapes and smart connectors.
- Great value for the money, only $199 dollars.
- Free technology support.
- Free examples and built-in templates to help you draw entity relationship diagrams rapidly.
DIAGRAM 13
Part 1
1. Dia Diagram EditorFeatures and functions:
· The Dia Diagram Editor for Mac excels over its counterparts for the feature of providing technical expertise in drawing patterns and versions.
· Both technical or IT- proficient people as well as non-technical users can feel at ease and derive utility out of the program.
· Newer shapes specific to user requirements can also be supported by the editor on writing elementary files in xm_x_l.
· Cross-platform operations are supported well.
· Be it an UML structure or Network diagram, flowchart or Entity-Relationship diagrams, the Dia Diagram Editor handles all with precision.
Pros of Dia Diagram Editor:
· Symbols and ob_x_jects have been predefined and offered as part of an extensive library.
· Thisfree drawing software for Macenables professional drawing and design experts to achieve their jobs efficiently, for the program offers sharp rendition of technical drawings and flowcharts.
· The program provides a proper canvas to work upon. Technical operations starting from edit and scrolling across images, to la_x_yering and managing accurate magnification ratio in images are all properly handled by the software.
· Installation of the Dia Diagram Editor has not been reported to cause much chaos, just like the clean process of uninstalling the same.
Cons of Dia Diagram Editor:
· Program requires Save at regular intervals, for the Dia Diagram Editor crashes down often.
· The colour of the text cannot be altered.
· Edit or delete operations cannot be performed on selected portions of the text, which is a major drawback.
User comments/reviews:
· I was looking for a simple app to help generate Flowcharts. This does it perfectly well.
· It's fabulous. Do you have to diagram something? Don't hesitate—this is your app. Get it and start diagramming. Woo!
· I use it to create diagrams and export in several formats, such as png and eps. I is simple and easy to use.
Online Diagramming Tool
http://sourceforge.net/projects/dia-installer/reviews/
Diagramming Software App For Mac
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