What is a UML diagram and how to create one [7 tools]?

Representing ideas in visual form is an effective way to help people understand what you want to convey. And UML diagrams provide the ability to do just that.

This is why UML diagrams are included in many code training and software documentation. Although it may take a considerable amount of time to build, it makes it easier for developers to quickly understand the software without wasting time in frequent meetings.

Suppose your business revolves around software development and design. In that case, UML diagrams can be very helpful for teams to visually document their ideas and simplify the development process a bit.

But what exactly are these UML diagrams?

This article describes UML diagrams, how they are useful, how to use them, and some tools to easily create these diagrams.

Are you ready?

Let’s enter!

What is a UML diagram?

Unified Modeling Language (UML) diagrams represent the design, architecture, and implementation of complex software systems.

UML diagrams utilize UML concepts. UML is a general-purpose development modeling language in software engineering that aims to provide a better way to visualize system designs. It was developed around 1994 at Rational Software to standardize the software design process.

UML is associated with object-oriented design and analysis. Uses OOP concepts such as classes, objects, inheritance, abstraction, data encapsulation, and polymorphism.

Types of UML diagrams

UML diagrams are divided into two main groups: structural diagrams and behavioral diagrams.

Structural diagram

The structure diagram shows the architectural and static parts of the system. In layman’s terms, it shows the various objects, classes, packages, components, etc. in the software and their relationships. The types of UML diagrams under Structure Diagram are:

• class diagram
• component diagram
• object diagram
• Composite structure diagram
• Developed view
• profile diagram
• package diagram

Operation diagram

Behavioral diagrams show dynamic system parts, or how software reacts to specific inputs. It is used to visualize how a system interacts and behaves with users, other entities, the system, and within itself. The types are:

• activity diagram
• timing diagram
• state machine diagram
• interaction diagram
• Use case diagram
• Interaction overview diagram
• sequence diagram
• communication diagram

How does it help?

When writing code, it’s difficult to keep track of hierarchies and relationships in software that has thousands of lines of code. UML diagrams divide software into various components and subcomponents.

Also, UML diagrams were introduced at a time when there were many concerns regarding the software development process, documentation, design, and analysis. Therefore, business professionals had found a simple solution to this problem: UML.

UML has brought innovative approaches and experiments that simplify these problematic tasks. Additionally, there is a growing demand for high-quality software that leverages automation technology to reduce time-to-market and cost.

These techniques include visual programming, patterns, frameworks, and component technologies. UML proposes solutions to all these problems. The benefits it brings are:

• It provides users with an expressive, ready-to-use visual modeling language to exchange and develop meaningful models.
• Achieves independence from specific development processes and programming languages
• This provides specialization and extensibility mechanisms to extend key concepts.
• Encourages the use of object-oriented tools
• Forms the basis for learning modeling languages
• Supports high-level software development concepts such as collaboration, components, patterns, and frameworks.

Where is it used?

UML diagrams are used for various purposes.

• For complex apps that require collaboration and effective planning by different teams, and need an easy way to communicate,
• Help non-programmers understand important software requirements, processes, and features
• Help your team effectively visualize user interactions, static structures, and processes with diagrams to save time.
• Software documentation makes it easy to understand everything about the system.

This is all about UML diagrams. If the software has enough motivation to use them, it’s time to understand how to use them effectively in less time. Harness the power of automation and technology to reduce the time it takes to create UML diagrams that previously took countless hours.

That said, there are many UML diagramming tools that can be used to efficiently design software processes, ideation, documentation, and more.

So, let’s take a look at some of the best UML diagram tools you can consider to create exemplary diagrams and ease your software development process.

mockup

Moqups ‘ UML diagram templates are useful when creating new software as they provide support throughout the development process. It also helps you stay organized and informed while keeping everyone updated on shared goals.

While working with these templates, Moqups allows you to take advantage of a dedicated stencil suite and provide exclusive UML diagram support. So, check out these templates, find the one that suits your requirements, and start building your innovative solution.

Get templates for class diagrams, sequence diagrams, and use case diagrams. Additionally, you can access a variety of UML diagram connectors to help you work with diagrams more efficiently and conveniently. Moqups provides online collaboration and facilitates real-time work with team members regardless of their location.

Remove silos from flowcharts and diagrams. Quickly link to other digital assets such as charts, mockups, graphs, and wireframes within a single Moqups project. By removing the barriers associated with single-purpose applications, teams can easily create workloads and flow along with projects.

lucid chart

When it comes to design, Lucidchart is also well known for creating UML diagrams. It’s a visual workspace that combines data visualization, diagramming, and collaboration to foster understanding and foster innovation.

Lucidchart is used by technical professionals and developers to create diagrams and work with source code, illustrate basic tasks and flows, and plan new features and functionality within a system.

You can also leverage UML graphs to visualize the future and current state of your product and ensure that your agile environment is productive for data scientists, engineers, software developers, and other technical professionals.

Sequence markup editors and UML diagramming tools help you learn code complexity easier and faster by automating the generation of class diagrams. Build and easily customize sequence diagrams online.

Enter your markup in the dialog box that appears, and Lucidchart will automatically create a sequence diagram according to the PlantUML standard. Alternatively, you can select a UML template and customize it by quickly rearranging shapes and symbols to reflect the system structure you want to represent with UML modeling tools.

Enabling the UML Shape Library gives you instant access to industry-grade UML shapes. Lucidchart doesn’t constrain or limit your ideas like other UML tools. Whether you’re building a UML component, object, deployment, class, or package diagram, you can drag and drop selected shapes onto the canvas without space limitations.

This tool also allows you to display external interactions by placing primary and secondary entities, such as data or customers, on the canvas and drawing some connecting lines for each use case. You can also create documentation to maintain software sustainability and health.

Lucidchart helps you speed up your onboarding process, facilitate effective communication of ideas, and reduce frequent meetings. This makes documentation and design easier, and improves the way you review, collect, and implement feedback from users and stakeholders.

Real-time collaboration lets you refine UML diagrams with colleagues online, whether you’re using a PC, Linux, or Mac. This UML diagram maker allows you to easily share your UML diagrams, customize sharing permissions, and invite others to review your diagrams.

You can share your document via URL or email, or export it to Jira, Slack, Microsoft Teams, or Confluence. You can take advantage of the presentation mode features to display diagrams and include focused sections for a closer look at your system.

creatively

Creately is a great tool for creating UML diagrams and easily collaborating on them. This tool is trusted by over 5 million people and thousands of teams from Amazon, NASA, PayPal, eBay, and more.

Visualize UML diagrams with minimal effort and interact with documents in real-time using Creately. Get instant feedback from clients and teams and help track changes from anywhere.

Easily draw UML diagrams with smart connectors and shapes, create contextual toolbars, and perform other advanced functions. Creately integrates with multiple tools you already use, including Slack, Google Drive, and Zapier.

Browse thousands of high-quality free templates professionally created for a variety of use cases and scenarios. These are useful for marketing teams, IT teams, software teams, education teams, HR teams, and more.

Access templates such as product launch flowcharts, decision flowcharts, workflow processes, and more. Creately is compatible with desktops (Linux, Windows, macOS), mobile devices (iOS and Android), browsers (Chrome, Internet Explorer, Opera, Mozilla Firefox, etc.), JIRA, Confluence, G Suite, and Chrome Web Store. .

sketch board

Sketchboard ‘s online UML tools make it easy to create designs and collaborate with class diagrams, use case diagrams, sequence diagrams, and more. You can create UML diagrams from anywhere.

Whether you want to create UML diagrams for software documentation, high-level feature mapping, or other purposes, Sketchboard makes it easy. Increase your team’s efficiency and creativity with this UML architecture diagram software.

Experienced software engineers designed this tool with security and privacy as core principles. We provide you with unlimited canvases to create as many diagrams as you like.

Sharing UML diagrams isn’t difficult with Sketchboard. Easily export as PDF, PNG, SVG, and JPEG. You can also integrate Sktechboard with GitHub, Google Drive, and Slack to develop sequence diagrams, class diagrams, and more.

Easily create UML architecture diagrams and leverage collaboration features to get other team members on the same page. You can also easily send and receive feedback to improve the quality and speed of the development process.

Leverage use case diagrams to draft system services, giving you the option to complete basic functionality before refining the design. It is also efficient to create class diagrams to provide a baseline for more structural diagrams. You can also create state machine diagrams to document changes in the state of entities during various events.

smart draw

Smartdraw ‘s powerful and easy diagramming tools are designed to make your work easier. The intelligent formatting engine lets you create and edit diagrams effortlessly, with automatic spacing, color schemes, resizing, and alignment features to give your designs a professional look.

Smartdraw has a wide collection of over 4,500 templates and over 34,000 symbols that you can choose from and implement into your diagrams. Get high-quality drawings that look like CAD designs using standard scales.

Build custom extensions using the VisualScript SDK or use built-in extensions for quick design. Easily collaborate with your team to share visuals, ideas, feedback, and more to help accelerate your development process.

Smartdraw has enterprise-grade management capabilities and can provision thousands of users with SSO. You can seamlessly integrate Smartdraw with tools like MS Office, AWS, Jira, Trello, Confluence, Google Apps, and more. It also integrates with Visio, so you can export and import diagrams effortlessly.

yUML

yUML is another useful tool you can consider for creating UML diagrams and sharing them to forums, issue trackers, and wikis. Used by thousands of authors, developers, architects, and even professionals at giant companies like Twitter and AWS.

This tool allows you to quickly create diagrams by simply entering text, without wasting hours on messy layouts. Since yUML is text-based, you can easily create diagrams from code in CI scripts.

Request images programmatically using PUT or GET commands. Tool vendors use it to extend yUML to scripts, wikis, and blogs. Create a variety of UML diagrams that can effectively communicate your ideas without interfering with UML expertise.

yUML is also security conscious, keeping your data safe and private through SSL. This allows registered users to directly manage diagrams within a custom namespace. You can also provide a permalink to the diagram, so the URL remains the same even if you change the diagram.

Vizio

Microsoft’s Visio is a popular and easy-to-use tool that helps you create UML diagrams, solve problems, and create documentation systems. Install this app on your desktop or access it directly on the web.

We provide many pre-built shapes and templates to create sophisticated UML diagrams to communicate your vision while meeting industry standards such as UML 2.5.

Share and collaborate on diagrams with your entire team and receive real-time feedback and comments on your diagrams. Show connections between different model elements by adding and modifying different relationship types such as associations, dependencies, and configurations.

The latest version of Visio includes enhanced templates for classes, activities, sequences, use cases, communications, databases, deployments, state machines, and more.

You can purchase Visio Professional here .

conclusion

UML diagrams effectively convey ideas, processes, functionality, and other aspects of software systems. Even if you don’t have a programming language, you can look at UML diagrams and understand what the developer is trying to convey.

Therefore, you can choose a UML diagramming tool to create designs that express your innovation and take your software development process to the next level easily and quickly.