# System Requirements Specification (SyRS) - Complete
## Centron Enterprise Application - System Requirements

### Document Information
- **Document ID**: SyRS-CENTRON-2024-001
- **Version**: 1.0
- **Date**: September 30, 2024
- **Prepared by**: ISO 29148 System Requirements Analysis Agent
- **Project**: UseCaseAnalyse (Centron Enterprise Application)
- **Related Documents**: StRS_Complete.md (Stakeholder Requirements Specification)

---

## 1. Executive Summary

### 1.1 System Overview
The Centron Enterprise Application is a comprehensive multi-layered .NET 8 enterprise business management system implemented using WPF for the client application with a dual-architecture pattern supporting both direct database access and web service communication. The system serves German-speaking enterprise markets with comprehensive CRM, financial management, helpdesk operations, project management, warehousing, and extensive third-party integrations.

### 1.2 System Context and Boundaries
**System Boundary**: The system encompasses:
- **WPF Client Application**: Desktop application providing rich user interface
- **Web Service Layer**: REST API enabling web-based access and integrations
- **Business Logic Layer**: Core business process implementation
- **Data Access Layer**: NHibernate-based ORM with SQL Server backend
- **External API Integration Layer**: 8 external service integrations
- **Shared Component Layer**: Common UI controls and core functionality

**External Systems**: FinAPI (banking), GLS/Shipcloud (shipping), ITscope/Icecat/Egis (product data), EbInterface (invoicing)

### 1.3 Architectural Principles
- **Dual Data Access Pattern**: ILogic interface with BL (database) and WS (web service) implementations
- **Dependency Injection**: Castle Windsor container managing service lifetimes
- **Modular Design**: Plugin-based module system with dynamic loading
- **Multi-Language Support**: German primary with English localization
- **Security-First**: Comprehensive GDPR compliance and enterprise security

---

## 2. System Architecture Requirements

### 2.1 Architectural Structure Requirements

#### 2.1.1 Multi-Layer Architecture
**SyR-001**: The system SHALL implement a multi-layered architecture with clear separation of concerns
- **Client Layer**: WPF UI application (src/centron/)
- **Business Logic Layer**: Core business functionality (src/backend/Centron.BL/)
- **Data Access Layer**: ORM and database interaction (src/backend/Centron.DAO/)
- **Entity Layer**: Domain object models (src/backend/Centron.Entities/)
- **Web Service Layer**: REST API implementation (src/webservice/)
- **Integration Layer**: External API clients (src/apis/)
- **Shared Layer**: Common components and controls (src/shared/)

#### 2.1.2 Dual Data Access Pattern
**SyR-002**: The system SHALL implement the ILogic interface pattern with dual implementations
- **BL{Module}Logic**: Direct database access via NHibernate
- **WS{Module}Logic**: Web service access via REST API
- **ClassContainer**: Dependency injection managing implementation selection
- **Connection Types**: CentronConnectionType.SqlServer and CentronConnectionType.CentronWebServices

#### 2.1.3 Module System Architecture
**SyR-003**: The system SHALL provide a plugin-based module system with dynamic loading
- **ICentronAppModuleController**: Module lifecycle management interface
- **BaseModule**: WPF UserControl base class for module views
- **IRibbonControlModule**: Ribbon interface integration
- **ModuleRegistration**: Centralized module registry with rights-based access

### 2.2 Technology Stack Requirements

#### 2.2.1 Core Framework Requirements
**SyR-004**: The system SHALL be built on Microsoft .NET 8 framework
**SyR-005**: The system SHALL use Windows Presentation Foundation (WPF) for client UI
**SyR-006**: The system SHALL use NHibernate ORM with FluentNHibernate for database access
**SyR-007**: The system SHALL use DevExpress 24.2.7 for advanced UI controls
**SyR-008**: The system SHALL use SQL Server as the primary database platform

#### 2.2.2 External Dependencies
**SyR-009**: The system SHALL use Castle Windsor for dependency injection
**SyR-010**: The system SHALL use NLog for comprehensive logging
**SyR-011**: The system SHALL use FastReport for report generation
**SyR-012**: The system SHALL use Bullseye for build orchestration

---

## 3. Functional System Requirements

### 3.1 User Management and Security System

#### 3.1.1 Authentication System
**SyR-013**: The system SHALL provide secure user authentication with multi-factor authentication support
- Windows Active Directory integration
- Username/password authentication
- Multi-factor authentication options
- Session management with configurable timeout

**SyR-014**: The system SHALL implement comprehensive role-based access control
- Granular permission system via UserRightsConst
- Hierarchical rights inheritance
- Group-based permission management
- Real-time rights validation

#### 3.1.2 User Interface System
**SyR-015**: The system SHALL provide a modern, responsive user interface optimized for business workflows
- DevExpress-based controls and themes
- Customizable dashboards and layouts
- Consistent UX patterns across modules
- Accessibility compliance support

**SyR-016**: The system SHALL support comprehensive localization
- German as primary language (LocalizedStrings.resx)
- English localization support (LocalizedStrings.en.resx)
- Locale-aware formatting for dates, numbers, currency
- Runtime language switching capability

### 3.2 Customer Relationship Management System

#### 3.2.1 Customer Data Management
**SyR-017**: The system SHALL maintain comprehensive customer profiles with complete history tracking
- Customer entity management (Centron.Entities)
- Contact person and relationship mapping
- Interaction history and communication tracking
- Customer-specific settings and preferences

**SyR-018**: The system SHALL provide advanced search and filtering capabilities
- Full-text search across customer data
- Multi-criteria filtering with saved preferences
- Real-time search results with performance optimization
- Export capabilities for search results

#### 3.2.2 Sales Process Management
**SyR-019**: The system SHALL support complete quote-to-order lifecycle management
- Quote generation with approval workflows
- Order conversion and processing
- Status tracking and notifications
- Integration with inventory and fulfillment

**SyR-020**: The system SHALL provide automated pricing and discount calculation
- Rule-based pricing engine
- Volume discount calculations
- Approval requirements for special pricing
- Comprehensive pricing audit trails

### 3.3 Financial Management System

#### 3.3.1 Receipt and Invoice Processing
**SyR-021**: The system SHALL provide comprehensive receipt and invoice processing
- Invoice generation with German compliance formatting
- Receipt processing and validation
- Tax calculations with German tax regulations
- Multi-currency support with exchange rate management

**SyR-022**: The system SHALL support automated payment processing and reconciliation
- Bank integration via FinAPI
- Automated payment matching
- SEPA payment processing
- Exception handling and manual reconciliation support

#### 3.3.2 Financial Reporting and Analytics
**SyR-023**: The system SHALL provide comprehensive financial reporting and analysis
- Standard financial reports (P&L, Balance Sheet, Cash Flow)
- Custom reporting with FastReport integration
- Drill-down analysis capabilities
- Export to multiple formats (PDF, Excel, CSV)

### 3.4 Helpdesk and Support System

#### 3.4.1 Ticket Management
**SyR-024**: The system SHALL provide comprehensive ticket lifecycle management
- Ticket creation from multiple channels (email, phone, web)
- Automated routing and assignment
- SLA monitoring and escalation
- Resolution tracking and documentation

**SyR-025**: The system SHALL support automated ticket routing and escalation
- Rule-based routing engine
- SLA-based automatic escalation
- Notification system for stakeholders
- Performance metrics and reporting

#### 3.4.2 Knowledge Management
**SyR-026**: The system SHALL provide integrated knowledge base functionality
- Searchable knowledge articles
- Article lifecycle management
- Customer self-service access
- Usage analytics and improvement tracking

### 3.5 Project Management System

#### 3.5.1 Project Lifecycle Management
**SyR-027**: The system SHALL support comprehensive project planning and execution
- Project templates and standardization
- Task management with dependencies
- Resource allocation and scheduling
- Progress tracking and reporting

**SyR-028**: The system SHALL provide project reporting and analytics
- Project performance dashboards
- Resource utilization reports
- Budget tracking and variance analysis
- Timeline and milestone reporting

### 3.6 Integration System Requirements

#### 3.6.1 External API Integration Framework
**SyR-029**: The system SHALL provide robust external service integration capabilities
- RESTful API client implementations (src/apis/)
- Standardized authentication handling
- Error handling and retry mechanisms
- Real-time monitoring and alerting

**SyR-030**: The system SHALL support real-time data synchronization
- Conflict resolution mechanisms
- Data consistency validation
- Synchronization status monitoring
- Error recovery and rollback capabilities

#### 3.6.2 Banking and Financial Integration
**SyR-031**: The system SHALL integrate with German banking systems
- FinAPI integration for automated banking
- SEPA payment support
- Transaction import and reconciliation
- Compliance with German banking regulations

---

## 4. Non-Functional System Requirements

### 4.1 Performance Requirements

#### 4.1.1 Response Time Requirements
**SyR-032**: The system SHALL provide response times of less than 2 seconds for 95% of user interactions
- Database query optimization with NHibernate
- UI responsiveness with async/await patterns
- Caching strategies for frequently accessed data
- Performance monitoring and alerting

**SyR-033**: The system SHALL support concurrent access by up to 500 simultaneous users
- Connection pooling and management
- Session state management
- Resource optimization and cleanup
- Load balancing capabilities

#### 4.1.2 Throughput Requirements
**SyR-034**: The system SHALL process up to 10,000 transactions per hour during peak periods
- Batch processing capabilities
- Queue management for high-volume operations
- Database optimization for transaction processing
- Performance scaling and monitoring

### 4.2 Scalability Requirements

#### 4.2.1 System Scalability
**SyR-035**: The system SHALL scale to support up to 1,000 registered users
- User capacity management
- Resource allocation scaling
- Database performance under user load
- Memory and CPU utilization optimization

**SyR-036**: The system SHALL handle databases up to 1TB in size with acceptable performance
- Database partitioning strategies
- Index optimization and maintenance
- Archive and purge strategies
- Storage performance monitoring

### 4.3 Reliability and Availability Requirements

#### 4.3.1 System Availability
**SyR-037**: The system SHALL provide 99.5% uptime during business hours (8 AM - 6 PM CET)
- High availability architecture design
- Redundancy and failover mechanisms
- Monitoring and alerting systems
- Disaster recovery procedures

**SyR-038**: The system SHALL support planned maintenance with maximum 4-hour downtime
- Rolling update capabilities
- Maintenance scheduling system
- User notification mechanisms
- Rollback procedures for failed updates

#### 4.3.2 Data Reliability
**SyR-039**: The system SHALL provide automatic data backup with point-in-time recovery
- Automated backup scheduling
- Transaction log backup strategies
- Point-in-time recovery capabilities
- Backup verification and testing

### 4.4 Security Requirements

#### 4.4.1 Data Security
**SyR-040**: The system SHALL encrypt all sensitive data at rest and in transit
- Database encryption with TDE (Transparent Data Encryption)
- Transport encryption with TLS 1.3
- Application-level encryption for sensitive fields
- Key management and rotation policies

**SyR-041**: The system SHALL maintain comprehensive audit logs
- User activity logging
- Data modification tracking
- Security event monitoring
- Log retention and compliance reporting

#### 4.4.2 Access Security
**SyR-042**: The system SHALL implement session management with automatic timeout
- Configurable session timeouts
- Concurrent session management
- Session hijacking prevention
- Secure session termination

### 4.5 Usability Requirements

#### 4.5.1 User Experience
**SyR-043**: The system SHALL provide intuitive navigation with minimal training requirements
- Consistent UI patterns and workflows
- Context-sensitive help and guidance
- Progressive disclosure of complexity
- User customization capabilities

**SyR-044**: The system SHALL support accessibility standards
- WCAG 2.1 compliance
- Keyboard navigation support
- Screen reader compatibility
- High contrast and font scaling support

### 4.6 Compatibility Requirements

#### 4.6.1 Platform Compatibility
**SyR-045**: The system SHALL support Windows 10 and Windows 11 operating systems
- OS compatibility testing and validation
- Hardware requirement specifications
- Driver and dependency management
- Update and patch compatibility

**SyR-046**: The system SHALL provide web browser compatibility
- Chrome, Firefox, and Edge support for web components
- HTML5 and CSS3 compliance
- JavaScript compatibility and optimization
- Mobile browser support for responsive components

### 4.7 Compliance Requirements

#### 4.7.1 Data Protection Compliance
**SyR-047**: The system SHALL comply with GDPR/DSGVO requirements
- Data subject rights implementation (Administration/DSGVO module)
- Consent management and tracking
- Data breach notification capabilities
- Privacy by design implementation

**SyR-048**: The system SHALL comply with German tax and accounting regulations
- German invoice formatting and requirements
- Tax calculation and reporting compliance
- Audit trail requirements
- Document retention compliance

---

## 5. System Interface Requirements

### 5.1 Internal Interface Requirements

#### 5.1.1 Layer Interface Requirements
**SyR-049**: The system SHALL implement standardized interfaces between architectural layers
- **ILogic Interfaces**: Standardized business logic contracts
- **DAO Interfaces**: Data access object contracts with NHibernate
- **Entity Interfaces**: Domain model contracts and relationships
- **Service Interfaces**: Cross-cutting service contracts

#### 5.1.2 Module Interface Requirements
**SyR-050**: The system SHALL provide standardized module integration interfaces
- **ICentronAppModuleController**: Module lifecycle management
- **IRibbonControlModule**: UI integration contracts
- **IBaseModule**: Common module functionality contracts
- **IModuleSettings**: Module configuration interfaces

### 5.2 External Interface Requirements

#### 5.2.1 Database Interface Requirements
**SyR-051**: The system SHALL provide robust database connectivity and management
- **NHibernate Configuration**: Automated configuration generation
- **Connection Management**: Multi-database connection support
- **Transaction Management**: ACID transaction support with rollback
- **Schema Management**: Database migration and versioning

#### 5.2.2 Web Service Interface Requirements
**SyR-052**: The system SHALL provide comprehensive REST API interfaces
- **ICentronRestService**: Complete API contract definition
- **Authentication Interfaces**: OAuth 2.0 and token-based authentication
- **Request/Response DTOs**: Standardized data transfer objects
- **Error Handling**: Consistent error response patterns

#### 5.2.3 External API Integration Interfaces
**SyR-053**: The system SHALL provide standardized external service integration
- **FinAPI Integration**: Banking and financial services (Centron.APIs.FinAPI)
- **Shipping Integrations**: GLS and Shipcloud logistics (Centron.Api.Gls, Centron.Api.Shipcloud)
- **Product Data Integrations**: ITscope, Icecat, Egis data services
- **Invoice Integration**: EbInterface electronic invoicing

---

## 6. System Data Requirements

### 6.1 Data Architecture Requirements

#### 6.1.1 Entity Relationship Requirements
**SyR-054**: The system SHALL implement comprehensive domain entity relationships
- **Customer Entities**: Customer, ContactPerson, Address hierarchies
- **Financial Entities**: Receipt, Invoice, Payment, AccountTransaction relationships
- **Support Entities**: Ticket, Task, Knowledge Article, Escalation relationships
- **Project Entities**: Project, Task, Resource, Timeline relationships

#### 6.1.2 Data Integrity Requirements
**SyR-055**: The system SHALL enforce data integrity at all levels
- **Primary Key**: Every table must have I3D [int] IDENTITY(1,1) NOT NULL
- **Foreign Key**: All relationships must end with I3D suffix
- **Standard Columns**: CreatedByI3D, CreatedDate, ChangedByI3D, ChangedDate, IsDeleted
- **Data Validation**: Entity-level and database-level constraint enforcement

### 6.2 Data Storage Requirements

#### 6.2.1 Database Design Requirements
**SyR-056**: The system SHALL implement optimized database design patterns
- **Normalized Design**: Third normal form compliance with performance exceptions
- **Indexing Strategy**: Query performance optimization with maintenance balance
- **Partitioning**: Large table partitioning for performance and maintenance
- **Archiving**: Historical data archiving with retention policies

#### 6.2.2 Data Migration Requirements
**SyR-057**: The system SHALL provide automated data migration capabilities
- **Schema Scripts**: Versioned database schema migration (BaseScriptMethod)
- **Data Migration**: Automated data transformation and migration
- **Rollback Support**: Migration rollback and recovery procedures
- **Validation**: Post-migration data integrity validation

---

## 7. System Quality Attributes

### 7.1 Maintainability Requirements

#### 7.1.1 Code Quality Requirements
**SyR-058**: The system SHALL implement high-quality code standards
- **SOLID Principles**: Single responsibility, open/closed, Liskov substitution, interface segregation, dependency inversion
- **Clean Architecture**: Clear separation of concerns with dependency inversion
- **Code Documentation**: Self-documenting code with minimal necessary comments
- **Testing**: Comprehensive unit, integration, and end-to-end testing

#### 7.1.2 Configuration Management Requirements
**SyR-059**: The system SHALL provide comprehensive configuration management
- **Application Settings**: Centralized settings management (ApplicationSettings table)
- **Environment Configuration**: Environment-specific configuration support
- **Runtime Configuration**: Dynamic configuration updates without restart
- **Configuration Validation**: Settings validation and error handling

### 7.2 Portability Requirements

#### 7.2.1 Platform Portability
**SyR-060**: The system SHALL support deployment flexibility within Windows ecosystem
- **Standalone Deployment**: Self-contained WPF application deployment
- **Web Service Deployment**: Windows Service and Console host deployment
- **Database Portability**: SQL Server version compatibility
- **Environment Portability**: Development, testing, and production environment support

### 7.3 Testability Requirements

#### 7.3.1 Testing Framework Support
**SyR-061**: The system SHALL provide comprehensive testing support
- **Unit Testing**: Isolated component testing with dependency injection
- **Integration Testing**: Cross-component and database integration testing
- **End-to-End Testing**: Complete workflow testing with UI automation
- **Performance Testing**: Load and stress testing capabilities

---

## 8. System Constraints and Assumptions

### 8.1 Technical Constraints

#### 8.1.1 Platform Constraints
**TC-001**: The system is constrained to .NET 8 framework and Windows platform
**TC-002**: The system requires SQL Server database platform
**TC-003**: The system requires DevExpress licensing for UI components
**TC-004**: External API integrations depend on third-party service availability

#### 8.1.2 Architectural Constraints
**TC-005**: The dual data access pattern requires synchronized interface contracts
**TC-006**: Module system requires adherence to plugin architecture patterns
**TC-007**: Localization requires UTF-8 with BOM encoding for all source files
**TC-008**: Security implementation must comply with German and EU regulations

### 8.2 Business Constraints

#### 8.2.1 Regulatory Constraints
**BC-001**: The system must comply with German and EU regulatory requirements
**BC-002**: The system is primarily designed for German-speaking markets
**BC-003**: Financial compliance requires adherence to German accounting standards
**BC-004**: Data protection must comply with GDPR/DSGVO requirements

### 8.3 Technical Assumptions

#### 8.3.1 Infrastructure Assumptions
**TA-001**: Target environment provides reliable SQL Server connectivity
**TA-002**: Network infrastructure supports REST API communication
**TA-003**: External service providers maintain API stability and availability
**TA-004**: Hardware infrastructure meets performance requirements

#### 8.3.2 Development Assumptions
**TA-005**: Development team has expertise in .NET 8 and WPF technologies
**TA-006**: DevExpress licensing and support will continue
**TA-007**: External API providers will maintain backward compatibility
**TA-008**: Database schema evolution will follow established migration patterns

---

## 9. System Verification and Validation

### 9.1 Verification Requirements

#### 9.1.1 Functional Verification
**SyV-001**: All functional requirements shall be verified through automated testing
- Unit tests for business logic components
- Integration tests for data access and external API integrations
- UI automation tests for user workflows
- Performance tests for scalability requirements

#### 9.1.2 Non-Functional Verification
**SyV-002**: All non-functional requirements shall be verified through systematic testing
- Performance benchmarking and load testing
- Security penetration testing and vulnerability assessment
- Usability testing with representative users
- Compliance auditing and validation

### 9.2 Validation Requirements

#### 9.2.1 Stakeholder Validation
**SyV-003**: System capabilities shall be validated against stakeholder requirements
- User acceptance testing with business stakeholders
- Functional validation with process owners
- Integration validation with external service providers
- Compliance validation with regulatory requirements

### 9.3 Acceptance Criteria

#### 9.3.1 System Acceptance Criteria
**SAC-001**: Performance requirements met under specified load conditions
**SAC-002**: Security requirements validated through independent security assessment
**SAC-003**: Compliance requirements certified through external audit
**SAC-004**: Integration requirements validated through end-to-end testing
**SAC-005**: Usability requirements validated through user acceptance testing

---

## 10. System Deployment and Operations

### 10.1 Deployment Requirements

#### 10.1.1 Installation Requirements
**SyD-001**: The system SHALL provide automated installation and configuration
- MSI installer packages for WPF client application
- Windows Service deployment for web service components
- Database schema deployment and migration automation
- Configuration management and validation

#### 10.1.2 Update and Maintenance Requirements
**SyD-002**: The system SHALL support in-place updates with minimal downtime
- Rolling updates for web service components
- Client application update mechanisms
- Database schema migration with rollback support
- Configuration preservation during updates

### 10.2 Operational Requirements

#### 10.2.1 Monitoring Requirements
**SyO-001**: The system SHALL provide comprehensive monitoring capabilities
- Application performance monitoring (APM)
- Database performance and health monitoring
- External integration monitoring and alerting
- User activity and security monitoring

#### 10.2.2 Backup and Recovery Requirements
**SyO-002**: The system SHALL provide robust backup and recovery procedures
- Automated database backup with point-in-time recovery
- Application configuration backup and restoration
- Disaster recovery procedures and testing
- Business continuity planning and execution

---

## 11. Traceability and Change Management

### 11.1 Requirements Traceability

#### 11.1.1 Stakeholder to System Traceability
All system requirements in this document are traceable to stakeholder requirements identified in StRS_Complete.md:
- **User Management (SyR-013 to SyR-016)** ← **StR-046 to StR-049**
- **CRM System (SyR-017 to SyR-020)** ← **StR-050 to StR-053**
- **Financial System (SyR-021 to SyR-023)** ← **StR-054 to StR-056, StR-062**
- **Helpdesk System (SyR-024 to SyR-026)** ← **StR-057 to StR-059**
- **Project Management (SyR-027 to SyR-028)** ← **StR-063 to StR-064**
- **Integration System (SyR-029 to SyR-031)** ← **StR-060 to StR-062**

#### 11.1.2 Architecture to Implementation Traceability
- **Client Architecture (SyR-001 to SyR-003)** → **src/centron/ components**
- **Backend Architecture (SyR-002, SyR-049)** → **src/backend/ components**
- **Web Service Architecture (SyR-052)** → **src/webservice/ components**
- **Integration Architecture (SyR-053)** → **src/apis/ components**
- **Shared Components (SyR-050)** → **src/shared/ components**

### 11.2 Change Management

#### 11.2.1 Change Control Process
**CM-001**: All system requirement changes must be evaluated for impact across:
- Stakeholder requirement alignment and validation
- Architectural consistency and integrity
- Implementation complexity and timeline impact
- Testing and validation requirement updates

#### 11.2.2 Version Control and Documentation
**CM-002**: System requirements documentation shall be maintained with:
- Version control integration with source code
- Change history and rationale documentation
- Impact analysis and approval workflows
- Stakeholder notification and communication

---

## 12. Conclusion

This System Requirements Specification provides a comprehensive technical foundation for the Centron Enterprise Application, transforming stakeholder needs into detailed system capabilities and constraints. The requirements reflect the sophisticated multi-layered architecture with dual data access patterns, comprehensive external integrations, and enterprise-grade security and compliance features.

### 12.1 Key System Capabilities
- **Multi-Modal Architecture**: Dual BL/WS implementation enabling both direct database and web service access
- **Enterprise Integration**: 8 external API integrations providing comprehensive business process automation
- **Modular Design**: Plugin-based architecture enabling flexible system extension and customization
- **Comprehensive Security**: GDPR-compliant security framework with role-based access control
- **German Market Focus**: Specialized compliance and localization for German enterprise requirements

### 12.2 Implementation Readiness
The system requirements are directly traceable to the existing codebase architecture, ensuring implementation alignment and feasibility. The dual-pattern architecture (BL/WS Logic) provides flexibility for different deployment scenarios while maintaining consistent business logic implementation.

### 12.3 Quality Assurance
The comprehensive verification and validation requirements ensure that all system capabilities meet stakeholder needs while maintaining enterprise-grade quality, security, and performance standards.

---

**Document Control**
- **Initial Version**: 1.0 - September 30, 2024
- **Review Cycle**: Monthly during development, quarterly during maintenance
- **Next Review**: October 30, 2024
- **Approval Authority**: System Architecture Review Board
- **Distribution**: Development teams, system architects, stakeholders

**Related Documents**
- StRS_Complete.md - Stakeholder Requirements Specification
- SyRS_Summary.md - System Requirements Executive Summary
- SyRS_Architecture.md - Detailed System Architecture
- SyRS_Interfaces.md - System Interface Specifications
- SyRS_API_Specification.yaml - REST API Specification
- SyRS_Traceability.csv - Requirements Traceability Matrix