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+# LDPv2 - Requirements Analysis Document
+
+## 1. Executive Summary
+
+LDPv2 (Lifecycle Data Platform version 2) is a comprehensive application lifecycle management tool designed to manage and document all applications within a business unit. It serves as a central repository for application information, tracking deployments, dependencies, SLAs, and stakeholder relationships throughout the complete application lifecycle.
+
+## 2. Purpose and Scope
+
+### 2.1 Primary Objectives
+
+-   Provide a centralized documentation platform for all managed applications
+-   Track application lifecycle from ideation to decommissioning
+-   Manage deployment history across multiple environments
+-   Document and monitor external dependencies and data usage agreements
+-   Maintain SLA definitions and compliance tracking
+-   Facilitate stakeholder communication and responsibility mapping
+
+### 2.2 Target Users
+
+-   Business Unit Directors and Program Managers
+-   Application Product Owners
+-   Development Teams
+-   Infrastructure and Operations Teams
+-   Compliance and Data Governance Officers
+
+## 3. Technical Architecture
+
+### 3.1 Technology Stack
+
+#### 3.1.1 Backend
+
+-   **Framework**: Spring Boot 3.x
+-   **Security**: Spring Security with JWT-based authentication
+-   **Authentication Strategy**:
+    -   Initial implementation: Local authentication (username/password)
+    -   Future evolution: OAuth 2.0 / OpenID Connect integration
+-   **Authorization**: Role-based access control (RBAC) with environment-specific permissions
+-   **Persistence**: PostgreSQL 16
+-   **ORM**: Hibernate 6.x (JPA implementation)
+-   **API Style**: RESTful API with JSON payloads
+
+#### 3.1.2 Frontend
+
+-   **Framework**: Angular 18
+-   **Authentication**: JWT token-based authentication
+-   **HTTP Client**: Angular HttpClient with interceptors for token management
+-   **State Management**: To be determined (NgRx, Signals, or service-based)
+-   **UI Components**: To be determined (Angular Material, PrimeNG, or custom)
+
+#### 3.1.3 Database
+
+-   **RDBMS**: PostgreSQL 16
+-   **Schema Management**: Liquibase or Flyway for database migrations
+-   **Connection Pooling**: HikariCP (Spring Boot default)
+
+### 3.2 Security Architecture
+
+#### 3.2.1 Authentication Flow
+
+1.  User submits credentials to `/api/auth/login`
+2.  Backend validates credentials against database
+3.  Upon successful authentication, JWT token is generated and returned
+4.  Frontend stores JWT token (localStorage or sessionStorage)
+5.  Subsequent requests include JWT token in Authorization header
+6.  Backend validates token on each request via Spring Security filters
+
+#### 3.2.2 Authorization Model
+
+-   **Environment-Based Roles**: Users can have different permissions per environment
+    -   Example: User may have READ access to PROD but WRITE access to DEV
+-   **Role Hierarchy**: To be defined (e.g., ADMIN > MANAGER > USER > VIEWER)
+-   **Resource-Level Permissions**: Fine-grained access control on applications and business units
+
+#### 3.2.3 Future OAuth Integration
+
+-   Support for enterprise SSO (Single Sign-On)
+-   Integration with identity providers (Azure AD, Okta, Keycloak)
+-   Backward compatibility with local authentication during migration
+
+### 3.3 API Design Principles
+
+-   RESTful resource-based endpoints (e.g., `/api/applications`, `/api/deployments`)
+-   Consistent HTTP verb usage (GET, POST, PUT, DELETE, PATCH)
+-   Pagination for list endpoints
+-   Filtering and sorting capabilities
+-   HATEOAS support for discoverability (optional)
+-   Versioned API (e.g., `/api/v1/...`)
+
+### 3.4 Data Persistence Strategy
+
+-   **Entity Mapping**: JPA entities with Hibernate annotations
+-   **Relationship Management**: Appropriate use of @OneToMany, @ManyToOne, @ManyToMany
+-   **Cascade Operations**: Carefully configured cascade types to maintain referential integrity
+-   **Lazy/Eager Loading**: Optimized fetch strategies to prevent N+1 queries
+-   **Auditing**: Automatic timestamp management using `@CreatedDate` and `@LastModifiedDate`
+
+## 4. Functional Requirements
+
+### 4.1 Business Unit Management
+
+**Description**: Organizations are structured around business units that own and manage applications.
+
+**Requirements**:
+
+-   Each business unit must have a unique name
+-   Business units must maintain a list of associated contacts with specific roles (Director, Program Manager, etc.)
+-   Support for hierarchical contact management with role-based assignments
+
+**Data Model**:
+
+-   Business Unit entity with name and metadata
+-   Many-to-many relationship with Contact entities
+-   Role specification for each business unit contact
+
+**API Endpoints**:
+
+-   `GET /api/business-units` - List all business units
+-   `GET /api/business-units/{id}` - Get business unit details
+-   `POST /api/business-units` - Create new business unit
+-   `PUT /api/business-units/{id}` - Update business unit
+-   `DELETE /api/business-units/{id}` - Delete business unit
+-   `GET /api/business-units/{id}/contacts` - Get contacts for business unit
+
+### 4.2 Application Management
+
+**Description**: Applications are the core entities tracked within the system, representing software systems deployed across various environments.
+
+**Requirements**:
+
+#### 4.2.1 Application Lifecycle Status
+
+Applications must track their current status through the following states:
+
+-   **IDEA**: Initial concept phase, not yet in development
+-   **IN_DEVELOPMENT**: Active development in progress
+-   **IN_SERVICE**: Deployed and operational in production
+-   **MAINTENANCE**: Undergoing maintenance or limited support
+-   **DECOMMISSIONED**: Retired and no longer in use
+
+Status transitions should be tracked with timestamps for audit purposes.
+
+#### 4.2.2 Multi-Environment Deployment
+
+-   Applications must support deployment across multiple environments
+-   Each deployment must be linked to a specific version of the application
+-   Complete deployment history must be maintained with timestamps
+-   Deployment tracking must record who deployed and when
+
+#### 4.2.3 Stakeholder Management
+
+-   Applications must maintain a list of contacts
+-   Each contact must be associated with a specific role (Product Owner, Functional Authority, Developer, Maintainer, etc.)
+-   Support for multiple stakeholders per role
+-   Contact information must include name, email, and phone number
+
+#### 4.2.4 Service Level Agreements
+
+-   Each application must be associated with an SLA definition
+-   SLA compliance must be trackable
+
+#### 4.2.5 Technical Documentation
+
+-   Applications must support multiple technical documentation references
+-   Each documentation entry must include:
+    -   Title
+    -   URL reference
+    -   Creation and update timestamps
+
+#### 4.2.6 Lifecycle Management
+
+-   End-of-life date tracking
+-   End-of-support date tracking
+-   Version-specific lifecycle information
+
+#### 4.2.7 External Dependencies
+
+-   Applications must be able to reference multiple external dependencies
+-   Dependencies can be of various types (detailed in section 4.4)
+
+**Data Model**:
+
+-   Application entity with status tracking (enum: IDEA, IN_DEVELOPMENT, IN_SERVICE, MAINTENANCE, DECOMMISSIONED)
+-   Relationship to Business Unit (many-to-one)
+-   Relationship to SLA (optional, one-to-one)
+-   Relationship to Versions (one-to-many)
+-   Relationship to Contacts (many-to-many)
+-   Relationship to Technical Documentation (one-to-many)
+-   Relationship to External Dependencies (one-to-many)
+
+**API Endpoints**:
+
+-   `GET /api/applications` - List applications (with filtering by status, business unit)
+-   `GET /api/applications/{id}` - Get application details
+-   `POST /api/applications` - Create new application
+-   `PUT /api/applications/{id}` - Update application
+-   `PATCH /api/applications/{id}/status` - Update application status
+-   `DELETE /api/applications/{id}` - Delete application
+-   `GET /api/applications/{id}/versions` - Get versions for application
+-   `GET /api/applications/{id}/deployments` - Get deployment history
+-   `GET /api/applications/{id}/contacts` - Get stakeholders
+-   `GET /api/applications/{id}/dependencies` - Get external dependencies
+
+### 4.3 Version Management
+
+**Description**: Each application release is tracked as a distinct version with specific attributes.
+
+**Requirements**:
+
+-   Every deployed application must be linked to a specific version
+-   Version tracking must include:
+    -   **Version Identifier**: Semantic version or custom identifier (e.g., "1.2.3", "2024.Q1")
+    -   **External Reference**: Link to source control, ticketing system, or release notes
+    -   **Release Date**: When the version was officially released
+    -   **End-of-Life Date**: When support for this version ends
+    -   **Creation Timestamp**: When the version record was created
+
+**Data Model**:
+
+-   Version entity linked to Application (many-to-one)
+-   Unique identifier and version metadata
+-   Lifecycle dates specific to the version
+-   Constraint: Version identifier must be unique within an application
+
+**API Endpoints**:
+
+-   `GET /api/applications/{appId}/versions` - List versions for an application
+-   `GET /api/versions/{id}` - Get version details
+-   `POST /api/applications/{appId}/versions` - Create new version
+-   `PUT /api/versions/{id}` - Update version
+-   `DELETE /api/versions/{id}` - Delete version
+
+### 4.4 External Dependencies Management
+
+**Description**: Applications often rely on external data sources and services. These dependencies must be documented and tracked.
+
+**Requirements**:
+
+#### 4.4.1 Dependency Types
+
+External dependencies can be classified into the following types:
+
+-   **WEB_SERVICE**: REST APIs, SOAP services, microservices
+-   **DATABASE**: External database connections
+-   **CERTIFICATE**: SSL/TLS certificates, authentication certificates
+-   **NETWORK_FLOW**: Network connections, firewall rules, VPN tunnels
+
+#### 4.4.2 Dependency Documentation
+
+Each external dependency must include:
+
+-   Name and type classification
+-   Descriptive documentation (free text)
+-   Technical documentation specific to the dependency
+-   Creation and update timestamps
+
+#### 4.4.3 Data Usage Agreements
+
+-   External dependencies must be linkable to one or more Data Usage Agreements
+-   This enables tracking of data governance and compliance requirements
+
+**Data Model**:
+
+-   External Dependency entity with type enumeration
+-   Relationship to Application (many-to-one)
+-   Relationship to Data Usage Agreements (many-to-many)
+
+**API Endpoints**:
+
+-   `GET /api/applications/{appId}/dependencies` - List dependencies for application
+-   `GET /api/dependencies/{id}` - Get dependency details
+-   `POST /api/applications/{appId}/dependencies` - Create new dependency
+-   `PUT /api/dependencies/{id}` - Update dependency
+-   `DELETE /api/dependencies/{id}` - Delete dependency
+-   `GET /api/dependencies/{id}/agreements` - Get data usage agreements for dependency
+
+### 4.5 Data Usage Agreements
+
+**Description**: Data Usage Agreements formalize the authorization to use external data sources and must be tracked for compliance purposes.
+
+**Requirements**: Each Data Usage Agreement must contain:
+
+-   **Data Nature**: Description of the type of data covered by the agreement
+-   **Documentation Link**: Reference to the legal or formal agreement document
+-   **Validity Start Date**: When the agreement becomes effective
+-   **Validity End Date**: When the agreement expires (optional for indefinite agreements)
+-   **Creation Timestamp**: When the agreement record was created
+
+**Data Model**:
+
+-   Data Usage Agreement entity with validity period
+-   Many-to-many relationship with External Dependencies
+
+**API Endpoints**:
+
+-   `GET /api/data-usage-agreements` - List all agreements (with expiration filtering)
+-   `GET /api/data-usage-agreements/{id}` - Get agreement details
+-   `POST /api/data-usage-agreements` - Create new agreement
+-   `PUT /api/data-usage-agreements/{id}` - Update agreement
+-   `DELETE /api/data-usage-agreements/{id}` - Delete agreement
+
+### 4.6 Environment Management
+
+**Description**: Environments represent distinct deployment targets where applications can be installed. Unlike traditional fixed environment types, LDPv2 treats environments as flexible entities that can be created and configured as needed.
+
+**Requirements**:
+
+#### 4.6.1 Environment as First-Class Entity
+
+Each environment is a distinct entity with its own attributes and lifecycle. This allows for:
+
+-   Multiple production environments (e.g., PROD-EU, PROD-US, PROD-ASIA)
+-   Team-specific development environments (e.g., DEV-TeamAlpha, DEV-TeamBeta)
+-   Customer-specific environments
+-   Temporary or experimental environments
+
+#### 4.6.2 Environment Attributes
+
+Each environment must be tracked with the following attributes:
+
+-   **Name**: Unique identifier for the environment (e.g., "PROD-EU", "INT-QA", "DEV-Mobile")
+-   **Description**: Optional free-text description of the environment's purpose
+-   **Production Flag**: Boolean indicator to identify production environments
+-   **Criticality Level**: Numeric rating (e.g., 1-5) to prioritize monitoring, incident response, and deployment approvals
+    -   Level 5: Critical production environments
+    -   Level 4: Important pre-production environments
+    -   Level 3: Integration and testing environments
+    -   Level 2: Development environments
+    -   Level 1: Experimental or temporary environments
+-   **Timestamps**: Creation and update tracking for audit purposes
+
+#### 4.6.3 Environment Flexibility
+
+-   Environments can be created, updated, and deactivated as needed
+-   No hard-coded list of environments in the application code
+-   Support for environment-specific security roles and permissions
+-   Environments can be organized or tagged for better management (future enhancement)
+
+#### 4.6.4 Environment-Based Access Control
+
+-   Users can have different permissions per environment
+-   Critical environments (high criticality level or production flag) may require additional approval workflows
+-   Deployment permissions should be configurable per environment
+
+**Data Model**:
+
+-   Environment entity with flexible attributes
+-   No enumeration constraints on environment names
+-   Referenced by Deployment entity for tracking application versions
+-   Potential for environment grouping or categorization (future)
+
+**API Endpoints**:
+
+-   `GET /api/environments` - List all environments (with filtering by production flag, criticality)
+-   `GET /api/environments/{id}` - Get environment details
+-   `POST /api/environments` - Create new environment
+-   `PUT /api/environments/{id}` - Update environment
+-   `DELETE /api/environments/{id}` - Deactivate/delete environment
+-   `GET /api/environments/{id}/deployments` - Get all deployments in this environment
+
+**Security Considerations**:
+
+-   Creating or modifying production environments should require elevated privileges
+-   Environment deletion should be soft delete to preserve deployment history
+-   Audit logging for all environment changes
+
+### 4.7 Deployment Tracking
+
+**Description**: Deployments represent the installation of a specific application version to a specific environment.
+
+**Requirements**:
+
+#### 4.7.1 Deployment Definition
+
+A deployment is uniquely defined by the combination of:
+
+-   Application (which application)
+-   Version (which release)
+-   Environment (where it's deployed)
+
+#### 4.7.2 Deployment History
+
+-   Complete deployment history must be maintained (immutable records)
+-   Each deployment record must include:
+    -   Deployment timestamp
+    -   User or system that performed the deployment
+    -   Optional notes or comments
+    -   Creation timestamp for audit purposes
+
+#### 4.7.3 Current State Tracking
+
+-   The system must be able to identify the currently active version in each environment
+-   This is determined by the most recent deployment for a given application-environment combination
+-   A dedicated API endpoint should provide current deployment state
+
+**Data Model**:
+
+-   Deployment entity with foreign keys to Application, Version, and Environment
+-   Timestamp-based ordering for historical tracking
+-   Business logic to determine "current" deployment (most recent by deployment date)
+
+**API Endpoints**:
+
+-   `GET /api/deployments` - List all deployments (with filtering)
+-   `GET /api/deployments/{id}` - Get deployment details
+-   `POST /api/deployments` - Record new deployment
+-   `GET /api/applications/{appId}/deployments/current` - Get current deployments per environment
+-   `GET /api/environments/{envId}/deployments/current` - Get all current deployments in environment
+-   `GET /api/deployments/history?applicationId={appId}&environmentId={envId}` - Deployment history for app in env
+
+**Business Rules**:
+
+-   Deployments are immutable once created (no updates, only new deployments)
+-   Deployment dates cannot be in the future
+-   Version must belong to the specified application
+
+### 4.8 Contact and Stakeholder Management
+
+**Description**: Contacts represent roles and responsibilities associated with applications, business units, and SLAs.
+
+**Requirements**:
+
+#### 4.8.1 Contact Roles
+
+The system must support various contact roles including but not limited to:
+
+-   Product Owner
+-   Functional Authority
+-   Developer
+-   Maintainer
+-   Technical Lead
+-   Business Analyst
+-   Director
+-   Program Manager
+
+Roles should be configurable and extensible.
+
+#### 4.8.2 Contact Structure
+
+A contact represents a functional role that can be associated with:
+
+-   One or more named individuals (persons)
+-   Multiple applications
+-   Business units
+-   SLAs
+
+#### 4.8.3 Person Information
+
+Each person assigned to a contact must have:
+
+-   First name and last name
+-   Email address (required, unique)
+-   Phone number (optional)
+-   Primary contact designation (one person per contact should be marked as primary)
+
+#### 4.8.4 Contact Relationships
+
+Contacts must be linkable to:
+
+-   Applications (with application-specific roles)
+-   Business Units (with organizational roles)
+-   SLAs (as responsible parties for service delivery)
+
+**Data Model**:
+
+-   ContactRole entity defining available roles
+-   Contact entity representing the functional position
+-   Person entity with individual contact details
+-   Junction tables for Contact-Person, Application-Contact, BusinessUnit-Contact, and SLA-Contact relationships
+
+**API Endpoints**:
+
+-   `GET /api/contact-roles` - List available contact roles
+-   `GET /api/contacts` - List all contacts
+-   `GET /api/contacts/{id}` - Get contact details with persons
+-   `POST /api/contacts` - Create new contact
+-   `PUT /api/contacts/{id}` - Update contact
+-   `DELETE /api/contacts/{id}` - Delete contact
+-   `GET /api/persons` - List all persons
+-   `GET /api/persons/{id}` - Get person details
+-   `POST /api/persons` - Create new person
+-   `PUT /api/persons/{id}` - Update person
+
+### 4.9 Service Level Agreement (SLA) Management
+
+**Description**: SLAs define the expected service levels, maintenance windows, and responsibilities for applications.
+
+**Requirements**:
+
+#### 4.9.1 Core SLA Metrics
+
+Each SLA must define:
+
+-   **Availability Percentage**: Expected uptime (e.g., 99.9%)
+-   **Minimum Average Response Time**: Expected response time in seconds
+-   **Reaction Time**: Time to respond to incidents (as text description)
+
+#### 4.9.2 Maintenance Windows
+
+-   SLAs must support multiple maintenance windows
+-   Each maintenance window must specify:
+    -   Day of the week (MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY)
+    -   Start time (HH:MM format)
+    -   End time (HH:MM format)
+-   Multiple maintenance windows can be defined for the same SLA
+
+#### 4.9.3 Critical Periods
+
+-   SLAs must track critical periods when higher service levels are required
+-   Each critical period must include:
+    -   Start datetime
+    -   End datetime
+    -   Duration in minutes
+    -   Optional description
+
+#### 4.9.4 SLA Documentation
+
+-   **Diagram**: Support for storing draw.io diagrams in JSON format showing system architecture and dependencies
+-   **Dependencies Description**: Free-text description of system dependencies
+-   **Responsibility Scope**: Clear definition of what is and isn't covered by the SLA
+
+#### 4.9.5 SLA Contacts
+
+-   Multiple contacts must be assignable to each SLA
+-   These represent the responsible parties for maintaining service levels
+
+**Data Model**:
+
+-   SLA entity with metrics and documentation
+-   MaintenanceWindow entity (one-to-many from SLA)
+-   CriticalPeriod entity (one-to-many from SLA)
+-   SLA-Contact junction table (many-to-many)
+
+**API Endpoints**:
+
+-   `GET /api/slas` - List all SLAs
+-   `GET /api/slas/{id}` - Get SLA details
+-   `POST /api/slas` - Create new SLA
+-   `PUT /api/slas/{id}` - Update SLA
+-   `DELETE /api/slas/{id}` - Delete SLA
+-   `GET /api/slas/{id}/maintenance-windows` - Get maintenance windows
+-   `POST /api/slas/{id}/maintenance-windows` - Add maintenance window
+-   `GET /api/slas/{id}/critical-periods` - Get critical periods
+-   `POST /api/slas/{id}/critical-periods` - Add critical period
+
+## 5. Data Model Summary
+
+### 5.1 Core Entities
+
+1.  **BusinessUnit**: Organizational container for applications
+2.  **Application**: Central entity representing software systems
+3.  **Version**: Releases of applications
+4.  **Environment**: Flexible deployment targets with custom names and attributes
+5.  **Deployment**: Records of version deployments to environments
+6.  **Person**: Individual stakeholders
+7.  **ContactRole**: Predefined roles for stakeholders
+8.  **Contact**: Functional positions held by persons
+9.  **TechnicalDocumentation**: Links to technical resources
+10.  **ExternalDependency**: External services and data sources
+11.  **DataUsageAgreement**: Legal agreements for data usage
+12.  **SLA**: Service level agreement definitions
+13.  **MaintenanceWindow**: Scheduled maintenance periods
+14.  **CriticalPeriod**: High-priority time windows
+
+### 5.2 Relationship Summary
+
+-   BusinessUnit → Application (1:N)
+-   Application → Version (1:N)
+-   Application + Version + Environment → Deployment (unique combination)
+-   Application ↔ Contact (N:N)
+-   Application → ExternalDependency (1:N)
+-   Application → TechnicalDocumentation (1:N)
+-   Application → SLA (1:1, optional)
+-   ExternalDependency ↔ DataUsageAgreement (N:N)
+-   Contact ↔ Person (N:N)
+-   SLA → MaintenanceWindow (1:N)
+-   SLA → CriticalPeriod (1:N)
+-   SLA ↔ Contact (N:N)
+
+### 5.3 Database Schema Considerations
+
+-   All primary keys: UUID type
+-   Foreign keys with appropriate CASCADE/RESTRICT rules
+-   Indexes on frequently queried fields (application status, environment production flag, deployment dates)
+-   Unique constraints where applicable (email in Person, environment name)
+-   Audit columns (createdAt, updatedAt) on all entities using JPA auditing
+
+## 6. Non-Functional Requirements
+
+### 6.1 Performance
+
+-   API response time < 500ms for 95% of requests
+-   Support for pagination on all list endpoints (default page size: 20)
+-   Efficient query optimization to prevent N+1 problems
+-   Database connection pooling (HikariCP)
+-   Caching strategy for reference data (contact roles, environments)
+
+### 6.2 Security
+
+-   JWT token expiration: 1 hour (configurable)
+-   Refresh token mechanism for session extension
+-   Password hashing: BCrypt with appropriate work factor
+-   HTTPS only in production
+-   CORS configuration for frontend origin
+-   SQL injection prevention via parameterized queries (JPA)
+-   XSS protection via Angular sanitization
+-   CSRF protection via Spring Security
+
+### 6.3 Audit and Compliance
+
+-   All entities must track creation and update timestamps
+-   Deployment history must be immutable for audit purposes
+-   Data Usage Agreement expiration must be trackable
+-   User actions should be logged (who did what, when)
+-   Database audit trail for sensitive operations
+
+### 6.4 Data Integrity
+
+-   Foreign key constraints enforced at database level
+-   Validation annotations on JPA entities (@NotNull, @Size, @Email, etc.)
+-   Business rule validation in service layer
+-   Transaction management for complex operations
+-   Soft delete for critical entities to preserve referential integrity
+
+### 6.5 Scalability
+
+-   The system must support hundreds of applications
+-   Deployment history may grow to thousands of records per application
+-   Efficient querying of current deployment states is critical
+-   Database indexing strategy for performance
+-   Potential for read replicas if query load increases
+
+### 6.6 Maintainability
+
+-   Clean separation of concerns (Controller → Service → Repository)
+-   DTOs for API layer to decouple from entity model
+-   MapStruct or ModelMapper for DTO conversion
+-   Comprehensive API documentation (Swagger/OpenAPI)
+-   Unit tests (JUnit 5, Mockito) with >80% code coverage
+-   Integration tests for critical workflows
+-   Docker containerization for consistent deployments
+
+### 6.7 Usability
+
+-   Intuitive Angular UI with responsive design
+-   Clear error messages and validation feedback
+-   Loading indicators for async operations
+-   Confirmation dialogs for destructive actions
+-   Keyboard navigation support
+-   Accessibility compliance (WCAG 2.1 Level AA)
+
+## 7. Implementation Phases
+
+### 7.1 Phase 1: Core Foundation (MVP)
+
+-   Database schema creation with Liquibase/Flyway
+-   JPA entity model implementation
+-   Spring Security with local authentication
+-   JWT token generation and validation
+-   Basic CRUD APIs for:
+    -   BusinessUnit
+    -   Application (with status tracking)
+    -   Environment
+    -   Contact and Person
+-   Angular authentication module
+-   Basic application listing and detail views
+
+### 7.2 Phase 2: Deployment Tracking
+
+-   Version entity and APIs
+-   Deployment entity and APIs
+-   Deployment history tracking
+-   Current deployment state queries
+-   Angular deployment management interface
+-   Deployment timeline visualization
+
+### 7.3 Phase 3: Dependencies and Compliance
+
+-   External Dependency entity and APIs
+-   Data Usage Agreement entity and APIs
+-   Dependency-Agreement linkage
+-   Technical Documentation management
+-   Angular forms for dependency tracking
+-   Expiration alerts for agreements
+
+### 7.4 Phase 4: SLA Management
+
+-   SLA entity and APIs
+-   Maintenance Window management
+-   Critical Period tracking
+-   SLA-Contact relationships
+-   Draw.io diagram storage and display
+-   Angular SLA management interface
+
+### 7.5 Phase 5: Advanced Features
+
+-   Environment-based role permissions
+-   OAuth 2.0 integration
+-   Advanced search and filtering
+-   Dashboard and analytics
+-   Reporting capabilities
+-   Notification system
+-   API rate limiting
+
+## 8. Testing Strategy
+
+### 8.1 Backend Testing
+
+-   **Unit Tests**: Service layer business logic (JUnit 5, Mockito)
+-   **Integration Tests**: Repository layer with test database (Testcontainers)
+-   **API Tests**: Controller endpoints (MockMvc, REST Assured)
+-   **Security Tests**: Authentication and authorization flows
+-   **Performance Tests**: Load testing for critical endpoints (JMeter, Gatling)
+
+### 8.2 Frontend Testing
+
+-   **Unit Tests**: Angular components and services (Jasmine, Karma)
+-   **Integration Tests**: Component interaction and routing
+-   **E2E Tests**: Critical user workflows (Cypress, Playwright)
+-   **Accessibility Tests**: WCAG compliance checking
+
+### 8.3 Test Coverage Goals
+
+-   Backend code coverage: >80%
+-   Frontend code coverage: >70%
+-   Critical path E2E coverage: 100%
+
+## 9. Deployment Architecture
+
+### 9.1 Development Environment
+
+-   Local PostgreSQL instance via Docker
+-   Spring Boot running on port 8080
+-   Angular dev server on port 4200
+-   Hot reload enabled for both frontend and backend
+
+### 9.2 Production Environment
+
+-   Containerized deployment (Docker/Kubernetes)
+-   PostgreSQL cluster with replication
+-   Load balancer for backend instances
+-   CDN for frontend static assets
+-   Separate database for each environment (dev, test, prod)
+-   Automated backup strategy
+
+### 9.3 CI/CD Pipeline
+
+-   Source control: Git (GitHub, GitLab, or Bitbucket)
+-   Build automation: Maven for backend, npm for frontend
+-   Continuous Integration: Jenkins, GitLab CI, or GitHub Actions
+-   Automated testing in pipeline
+-   Docker image building and publishing
+-   Automated deployment to test environments
+-   Manual approval for production deployment
+
+## 10. Documentation Requirements
+
+### 10.1 Technical Documentation
+
+-   API documentation (Swagger/OpenAPI specification)
+-   Database schema documentation (ER diagrams)
+-   Architecture decision records (ADRs)
+-   Deployment and configuration guides
+-   Security best practices guide
+
+### 10.2 User Documentation
+
+-   User manual for each user role
+-   Quick start guide
+-   Video tutorials for common workflows
+-   FAQ section
+-   Troubleshooting guide
+
+## 11. Future Considerations
+
+### 11.1 Potential Enhancements
+
+-   Integration with CI/CD pipelines for automatic deployment recording
+-   Automated SLA compliance monitoring and alerting
+-   Dashboard views for application portfolio management
+-   Notification system for expiring Data Usage Agreements
+-   Advanced reporting and analytics
+-   Mobile application for on-the-go access
+-   Webhook support for external integrations
+-   GraphQL API as alternative to REST
+-   Elasticsearch integration for advanced search
+-   Audit log viewer with filtering
+
+### 11.2 Reporting Requirements
+
+-   Application inventory reports by status
+-   Deployment frequency analytics
+-   Environment utilization reports
+-   SLA compliance reporting
+-   Dependency mapping and impact analysis
+-   End-of-life planning reports
+-   Data usage agreement expiration forecasts
+-   Stakeholder contact directory
+
+## 12. Success Criteria
+
+The LDPv2 system will be considered successful when:
+
+1.  All applications within the business unit are accurately documented
+2.  Deployment history is complete and traceable across all environments
+3.  Stakeholders can easily identify current application states and ownership
+4.  Compliance officers can track data usage agreements effectively
+5.  SLA definitions are clearly documented and accessible
+6.  The system serves as the single source of truth for application lifecycle data
+7.  Users can perform all core functions without training (intuitive UI)
+8.  System uptime > 99.5%
+9.  User satisfaction score > 4.0/5.0
+
+----------
+
+**Document Version**: 2.0  
+**Last Updated**: February 2026  
+**Status**: Technical Specification - Ready for Development  
+**Prepared By**: Laurent  
+**Review Date**: To be scheduled