Software Requirements Specification (SRS)

1. Introduction

1.1 Purpose

This Software Requirements Specification (SRS) document version 4.0 provides a complete description of all functionalities, constraints, and requirements for the DataXpert system. This is the fourth major release, representing a production-ready system with enhanced features, security, and performance optimizations. It is intended for developers, stakeholders, and end-users to understand the system's capabilities and limitations.

1.2 Scope

DataXpert version 4.0 is a production-grade, cloud-based business analytics platform that enables organizations to:

• Upload and manage business data (sales, profits, expenses) with smart validation
• Analyze data using AI-powered natural language processing with intent recognition
• Visualize trends through interactive dashboards with Chart.js integration
• Detect anomalies automatically using Z-score machine learning algorithms
• Generate forecasts and comparative analysis with statistical models
• Export data in multiple formats (CSV, Excel, JSON)
• [V4.0] Dual authentication with Google OAuth 2.0 integration
• [V4.0] Production deployment on Render (backend) and Vercel (frontend)
• [V4.0] Enhanced security with CORS, JWT token management, and password hashing
• [V4.0] Responsive dark/light theme support
• [V4.0] Comprehensive API documentation with Swagger/OpenAPI

1.3 Definitions, Acronyms, and Abbreviations

1.4 References

• Flask Documentation: https://flask.palletsprojects.com/
• Supabase Documentation: https://supabase.com/docs
• Chart.js Documentation: https://www.chartjs.org/docs/

2. Overall Description

2.1 Product Perspective

DataXpert version 4.0 is a production-ready, cloud-deployed web application consisting of:

• Frontend: HTML5, CSS3, Vanilla JavaScript (Deployed on Vercel)
• Backend: Flask 3.1.3 (Python) REST API (Deployed on Render)
• Database: Supabase (PostgreSQL) - Cloud-hosted
• AI/ML: Scikit-learn 1.8.0, Pandas 2.3.3, NumPy 1.26.4, SciPy 1.17.1
• Authentication: JWT (7-day expiry) + Google OAuth 2.0
• Server: Gunicorn 21.2.0 with production configuration

2.2 Product Functions

2.3 User Classes and Characteristics

2.4 Operating Environment

• Client Side: Modern web browsers (Chrome 90+, Firefox 88+, Safari 14+, Edge 90+)
• Frontend Hosting: Vercel (https://dataxpert.dev, https://dataxpert-orcin.vercel.app)
• Backend Hosting: Render Free Tier (https://dataxpert-5twp.onrender.com)
• Database: Supabase cloud PostgreSQL (hosted)
• Minimum Internet Speed: 2 Mbps (recommended 5+ Mbps)
• Screen Resolutions: 320px (mobile) to 2560px+ (desktop)
• [V4.0] CDN: Cloudflare for static assets
• [V4.0] SSL/TLS: HTTPS enforced on all domains

3. System Features

3.1 User Authentication and Authorization

3.2 Business Data Management

3.3 Dashboard and Visualization

3.4 AI-Powered Chat Analysis

3.5 Anomaly Detection

3.6 Data Export

4. External Interface Requirements

4.1 User Interfaces

• UI-1: Landing page with feature overview and authentication
• UI-2: Login/Signup modals with email and Google options
• UI-3: Dashboard with charts and KPI cards
• UI-4: Analysis page with chat interface
• UI-5: Profile page with user settings
• UI-6: Dark/Light theme toggle
• UI-7: Responsive design for mobile, tablet, desktop

4.2 Hardware Interfaces

No direct hardware interfaces. System operates entirely in web browsers.

4.3 Software Interfaces

4.4 Communications Interfaces

• Protocol: HTTPS/HTTP
• API Format: RESTful JSON
• Authentication: JWT Bearer tokens
• CORS: Configured for allowed origins

5. Non-Functional Requirements

5.1 Performance Requirements

• NFR-1.1: API response time shall be under 3 seconds (V4.0 Target: 1.5s average)
• NFR-1.2: Page load time shall be under 2 seconds (V4.0: <1.5s with CDN)
• NFR-1.3: System shall support 100 concurrent users (V4.0: tested up to 150)
• NFR-1.4: Database queries shall execute within 1 second (V4.0: optimized with indexes)
• NFR-1.5: Chart rendering shall complete within 1 second (V4.0: <800ms)
• [V4.0] NFR-1.6: Cold start time (Render wake-up) shall be under 60 seconds
• [V4.0] NFR-1.7: File upload processing shall handle 10MB files within 5 seconds

5.2 Safety Requirements

• NFR-2.1: System shall backup data daily
• NFR-2.2: System shall implement error logging
• NFR-2.3: System shall gracefully handle failures

5.3 Security Requirements

5.4 Software Quality Attributes

6. System Models

6.1 Use Case Diagram

                    ┌──────────────┐
                    │              │
                    │     User     │
                    │              │
                    └──────┬───────┘
                           │
        ┌──────────────────┼──────────────────┐
        │                  │                  │
        ▼                  ▼                  ▼
  [Register/Login]   [Upload Data]    [View Dashboard]
        │                  │                  │
        │                  ▼                  ▼
        │          [Analyze Data]      [Export Data]
        │                  │
        │                  ▼
        └─────────▶  [Chat with AI]
                    

6.2 Data Flow Diagram (Level 0)

┌─────────┐          ┌───────────────┐          ┌──────────┐
│         │          │               │          │          │
│  User   │◀────────▶│   DataXpert   │◀────────▶│ Database │
│         │          │   System      │          │          │
└─────────┘          └───────┬───────┘          └──────────┘
                             │
                             │
                             ▼
                     ┌───────────────┐
                     │   AI Engine   │
                     │   (Analysis)  │
                     └───────────────┘
                    

6.3 State Diagram (User Session)

[Logged Out] ──Login──▶ [Authenticated] ──Logout──▶ [Logged Out]
                              │
                              ├──Upload Data──▶ [Data Uploaded]
                              │
                              ├──View Dashboard──▶ [Dashboard Active]
                              │
                              └──Chat Analysis──▶ [Analysis Active]
                    

7. Appendices

7.1 API Endpoints

7.2 Database Schema

See ER Diagram page for complete database schema.

7.3 Assumptions and Dependencies

• Users have stable internet connection
• Supabase service is available and operational
• Google OAuth service is accessible
• Users have modern web browsers with JavaScript enabled
• Render hosting service maintains 99.5% uptime

Version History