mermaid-diagrams

Topics in the source

• Mermaid Diagramming
• Core Syntax Structure
• Diagram Type Selection Guide
• Quick Start Examples
• Class Diagram (Domain Model)
• Sequence Diagram (API Flow)
• Flowchart (User Journey)
• ERD (Database Schema)

Create professional software diagrams using Mermaid's text-based syntax. Mermaid renders diagrams from simple text definitions, making diagrams version-controllable, easy to update, and maintainable alongside code. All Mermaid diagrams follow this pattern: Key principles: First line declares diagram type (e.g., classDiagram, sequenceDiagram, flowchart) Use %% for comments Line breaks and indentation improve readability but aren't required Unknown words break diagrams; parameters fail silently Choose the right diagram type: 1. Class Diagrams - Domain modeling, OOP design, entity relationships Domain-driven design documentation Object-oriented class structures Entity relationships and dependencies 2. Sequence Diagrams - Temporal interactions, message flows API request/response flows User authentication flows System component interactions Method call sequences 3. Flowcharts - Processes, algorithms, decision trees User journeys and workflows Business processes Algorithm logic Deployment pipelines 4. Entity Relationship Diagrams (ERD) - Database schemas Table relationships Data modeling Schema design 5. C4 Diagrams - Software architecture at multiple levels System Context (systems and u

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