Activity Diagram for Hotel Room Booking
The UML activity diagram is a diagram that presents the flow of hotel room booking system activities. It is one of the methods used to document the system’s behavior in …
UML Diagrams Library: 300+ Free Examples for BSIT Capstone Projects (2026)
itsourcecode.com hosts 300+ free UML diagrams for BSIT capstone and final-year projects: ER diagrams, Data Flow Diagrams (DFD), Class Diagrams, Use Case, Activity, Sequence, Component, and Deployment diagrams for common systems like Library Management, Hospital, Hotel, Restaurant, School, ATM, Payroll, E-commerce, and more. Every diagram is downloadable, editable, and free for academic use. Browse by diagram type below, or jump directly to a complete UML set for your specific capstone system.
Why UML diagrams matter for your capstone defense
UML (Unified Modeling Language) diagrams are required documentation for almost every BSIT capstone and thesis defense in 2026. Your panel will ask to see at least four: a use case diagram (what the system does), an ER diagram or class diagram (what data it manages), an activity or sequence diagram (how the workflow runs), and a deployment diagram (how it’s hosted). Submitting a project without these is the single most common reason panels reject documentation on first review.
How to choose the right UML diagram for your project
Start with these four, in this order, they cover ~90% of capstone requirements:
Use Case Diagram: Shows actors (admin, customer, staff) and what each can do. Build this first. It defines your scope.
ER Diagram (Entity Relationship): Shows your database tables and how they relate. Build this second, before writing code.
Activity Diagram: Shows the step-by-step flow of a specific feature (e.g., “borrow a book”, “place an order”). Build one per major use case.
Class Diagram: Shows the object-oriented structure of your code. Build this once your architecture is locked.
If your defense panel asks for “sequence” or “component” diagrams, you’ll find those below too. Most BSIT programs require 4-8 UML diagrams total per thesis.
Featured UML diagrams by type
📐 Use Case Diagrams (43 examples)
Shows who can do what. Required for almost every BSIT capstone.
Library Management System, Use Case Diagram
Hotel Management System, Use Case Diagram
Hotel Reservation System, Use Case Diagram (2026)
Online Shopping System, Use Case Diagram
Online Shopping Cart, Use Case Diagram (2026)
→ Browse all 43 Use Case Diagrams
🗂️ ER Diagrams: Entity Relationship (38 examples)
Shows your database structure. Required before coding starts.
College Library Management System, ER Diagram
School Management System, ER Diagram (Complete Database Design)
ATM Management System, ER Diagram
→ Browse all 38 ER Diagrams
🔀 Data Flow Diagrams: DFD (42 examples)
Shows how data moves through your system at Level 0, 1, and 2.
DFD for Library Management System, Levels 0, 1, 2
DFD for Restaurant Management System (Complete Guide)
DFD for Hotel Reservation System, Levels 0, 1, 2
DFD for Online Shopping System
DFD for Online Shopping Cart
DFD for E-Commerce Website
DFD for Hospital Management System, All Levels
→ Browse all 42 Data Flow Diagrams
🏛️ Class Diagrams (100+ examples)
Shows your object-oriented code structure. Includes Java and PHP class examples.
Library Management System, Class Diagram (Java + PHP)
Hotel Management System, Class Diagram
Hospital Management System, Class Diagram (Java + PHP)
School Management System, Class Diagram
Restaurant Management System, Class Diagram
⚡ Activity Diagrams (33 examples)
Shows the step-by-step flow of a specific feature or process.
Library Management System, Activity Diagram
ATM Management System, Activity Diagram
Hospital Management System, Activity Diagram (2026)
Login & Registration, Activity Diagram
→ Browse all 33 Activity Diagrams
🔁 Sequence Diagrams (35 examples)
Shows the time-ordered interactions between actors and the system.
Library Management System, Sequence Diagram
Hotel Management System, Sequence Diagram
Hotel Reservation System, Sequence Diagram (2026)
Hospital Management System, Sequence Diagram
Online Shopping System, Sequence Diagram
E-Commerce Website, Sequence Diagram
→ Browse all 35 Sequence Diagrams
🧩 Component & Deployment Diagrams
Shows the physical structure of your system (servers, libraries, modules).
Component Diagram, Library Management
Deployment Diagram, Library Management
Component Diagram, Hospital Management
Deployment Diagram, Hospital Management
Component Diagram, Railway Reservation
Component Diagram, Airline Reservation
Complete UML diagram sets by system
If you’ve picked your capstone system, jump straight to a complete UML set, each page below contains multiple diagrams (Use Case + DFD + Class + ER + Sequence + Activity) for one system, organized for your defense documentation.
Library Management System: Complete UML Set (DFD + Class + Use Case + 6 more)
Hospital Management System: Complete UML Set (Class + DFD + Activity + Component + Sequence)
Hotel Management System: Complete UML Set (DFD + Class + Use Case)
Restaurant Management System: Complete UML Set (DFD + Class)
E-Commerce Website: Complete UML Set (Class + Use Case + Sequence)
Online Shopping System: Complete UML Set
Student Enrollment System: Complete UML Set (DFD + Class + Use Case)
Credit Card Processing System: Complete UML Set (Class + Sequence + DFD)
Face Recognition Attendance System: Complete UML Set
About this UML diagrams collection
This UML diagrams library has been curated since 2015 by PIES Information Technology Solutions, a software services company based in Binalbagan, Negros Occidental, Philippines. The collection is used by 12,000+ BSIT students monthly across the Philippines, India, and the United States for capstone, thesis, and coursework documentation. If you’ve found a specific diagram useful for your defense, or you need a UML diagram for a system we don’t yet cover, leave a comment on the related post or contact us via the site footer.
Hotel Reservation System Sequence Diagram 2026: Complete UML [Free Download]
Sequence Diagram for Hotel Reservation System The sequence diagram for hotel reservation system describes the series of interactions that occur in objects during the system process. This sequence diagram is …
Component Diagram for Hotel Reservation System
The UML component diagram for Hotel Reservation System shows how the reservation system parts work together to make the system operate correctly. This diagram visualizes the software’s parts, how are …
ER Diagram for Order Management System
The order management system ER Diagram reveals the relationships of its entities to form the project database design. This describes the logical structure of the system’s database or data storage. …
Online Shopping Cart UML Diagram | UML Diagrams
The Online Shopping Cart UML diagrams are based on Unified Modeling Language which was used to represent the system’s primary users, roles, activities, artifacts, or classes. The UML Diagrams are …
Deployment Diagram for Online Shopping Cart | UML
The UML deployment diagram for online shopping cart is used to describe the system’s operations, showing the hardware and software components that run in each node, and explaining the connections …
Component Diagram for Online Shopping Cart | UML
The UML component diagram for online shopping cart is used to show how the parts of the online shopping work together to make the system operate correctly. This diagram visualizes …
Shopping Cart ER Diagram | Entity Relationship Diagram
The ER diagram for online shopping cart project reveals the relationships of the shopping cart entities within the database. This describes the logical structure of the system’s database or data …
Activity Diagram for Shopping Cart | UML
Activity Diagram for Shopping Cart The UML activity diagram for shopping cart is a diagram that presents the flow of shopping activities. It is also used to emphasize the system’s …
Sequence Diagram for Online Shopping Cart
Sequence Diagram for Online Shopping Cart The sequence diagram for online shopping cart describes the series of interactions that occur with the objects when performing the process on the system. …
Use Case Diagram for Online Shopping Cart 2026: Complete UML [Free PDF]
Use Case Diagram for Online Shopping Cart The UML use case diagram is the behavioral diagram used to reveal the activities between the online shopping cart and its users. It …
Class Diagram for Online Shopping Cart
A UML class diagram is used to represent, explain, and document the parts (classes) of an online shopping cart. It can also be a reference or way to create executable …
DFD for Login System Diagram 2026: Levels 0, 1, 2 [Free PDF + Source Code]
Login System DFD Diagram The Login System DFD (Data Flow Diagram) describes the overall “flow” of data on the login page. It is used to document the transformation of data …
Frequently Asked Questions
What is UML and why do BSIT capstone projects need it?
UML (Unified Modeling Language) is a standard set of diagrams used to visualize, design, and document software systems before you write code. For BSIT capstones, UML is required because your defense panel needs to verify that you actually designed the system, not just downloaded code. Chapter 3 (Methodology) of every Philippine BSIT capstone manuscript expects at minimum a Use Case Diagram, a Class Diagram, and either a DFD or an ER Diagram. Panels also use UML to test whether you understand your own system: if you cannot explain your own diagram in defense, that is an automatic red flag.
Which UML diagrams are required for a BSIT capstone in 2026?
The standard set most Philippine panels expect is: Use Case Diagram (who can do what), Class Diagram (system entities and their relationships), Sequence Diagram (how a key transaction flows over time), Activity Diagram (the workflow for one major process), and either a DFD (Data Flow Diagram) or an ER Diagram (database schema). For larger systems you can also add a Component Diagram and a Deployment Diagram. Stick to 4-5 well-explained diagrams rather than 10 you cannot defend.
What is the difference between UML and DFD (Data Flow Diagram)?
UML is the umbrella standard, which includes 14 diagram types (Class, Use Case, Sequence, Activity, Component, etc.). DFD is a separate, older notation that predates UML and focuses specifically on how data moves between processes, data stores, and external entities. Most BSIT panels accept both because DFD shows the data flow story cleanly, while UML Use Case and Class diagrams show the structural story. The safest approach for capstone is to include one DFD (Level 0 plus Level 1) AND a UML Class Diagram. Browse our UML Diagrams Library for examples of both.
What software should I use to draw UML diagrams?
For BSIT capstone work in 2026 the top three free options are draw.io (now diagrams.net, browser-based, no signup, exports clean PNG and PDF), Lucidchart (web-based, free tier supports 60 shapes per diagram which is enough for capstone), and StarUML (desktop, generates real UML syntax and can reverse-engineer existing code). Avoid Microsoft Visio unless your school provides a license. PlantUML is great if you prefer text-based diagram generation. Whatever you pick, export the final image as high-resolution PNG and embed it in your manuscript at full page width.
Can I copy the UML diagrams on itsourcecode.com for my capstone?
You can use our diagrams as a reference and starting point, but you should not paste them unchanged into your manuscript. Adapt every diagram to your specific system: rename the actors to match your stakeholders, replace the class names with your real entities, add the attributes your database actually uses, and remove anything that does not apply. A panel that recognizes a verbatim itsourcecode.com diagram will mark you down for originality. Treat our library as your structural template, not your finished work.
Where do UML diagrams go in the capstone Chapter 1-5 manuscript?
Most Philippine BSIT capstones place UML diagrams inside Chapter 3 (Methodology) under a "System Design" or "Conceptual Framework" section. The typical order is: Use Case Diagram first (defines scope), then Class Diagram or ER Diagram (defines the data), then Sequence and Activity diagrams (defines behavior), then optional Component or Deployment diagrams (defines architecture). Each diagram should have a figure caption (Figure 3.1, 3.2, etc.) and at least one paragraph explaining what the panel is looking at. See our full capstone writing series for chapter-by-chapter templates.
Do you have source code that matches these UML diagrams?
Yes. Most of our UML pages now include a "Working source code that implements this diagram" section near the bottom, with downloadable projects in PHP, Java, ASP.NET, VB.NET, Python, Django, Laravel, and CodeIgniter for the same system. Browse our Free Projects hub if you need to start from the code side and work backward to the diagram. The pairing of "diagram + working source code" is the strongest evidence you can show your panel that your design and implementation match.