drawio-logical-diagrams

Draw.io Logical Diagrams Creation

Overview

Create professional logical diagrams in draw.io's native XML format for logical flow diagrams, system architecture visualizations, and abstract process representations using generic shapes and symbols.

When to Use

• Creating logical flow diagrams showing data flow between system components
• Designing logical architecture diagrams (abstract system structure)
• Building BPMN process diagrams for business processes
• Drawing UML diagrams (class, sequence, activity, state)
• Creating data flow diagrams (DFD) for system analysis
• Making decision flowcharts with branching logic
• Visualizing system interactions and sequences
• Documenting logical system design without cloud specifics

Do NOT use for: AWS/Azure/GCP architecture diagrams (use aws-drawio-architecture-diagrams).

Instructions

Creating a Logical Diagram

1. Analyze the request: Understand the system/process to diagram
2. Choose diagram type: Flowchart, architecture, BPMN, UML, DFD, etc.
3. Identify elements: Determine actors, processes, data stores, connectors
4. Draft XML structure: Create the mxGraphModel with proper root cells
5. Add shapes: Create mxCell elements with appropriate styles
6. Add connectors: Link elements with edge elements
7. Validate XML: Verify XML is well-formed and all IDs are unique (see validation checklist below)
8. Output: Write the .drawio file for the user

XML Validation Checklist

Before outputting the file, verify:

• All tags are properly closed (no unclosed <mxCell>, </mxGeometry>, etc.)
• All cell IDs are unique (0 and 1 are reserved root cells, use sequential integers starting from 2)
• All source and target attributes reference existing cell IDs
• All parent attributes reference existing cell IDs
• All coordinates (x, y, width, height) are positive numbers
• Special characters are escaped (< → <, > → >, & → &)
• Multi-line labels use 
 or <br> with html=1 in style