# xwquery Project Phases

**Company:** eXonware.com  
**Author:** eXonware Backend Team  
**Email:** connect@exonware.com  
**Date:** October 11, 2025

## Overview

xwquery follows a structured 5-phase development approach designed to deliver enterprise-grade universal query language functionality while maintaining rapid iteration and continuous improvement.

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## Phase 0: Experimental Stage (Current)
**Version:** 0.x.x  
**Timeline:** Q4 2025  
**Status:** 🟢 **ACTIVE**

### Goals
- Extract query language from xwnode into standalone library
- Establish core query execution engine  
- Implement 50 query operations
- Support 35+ query format converters
- Type-aware query optimization

### Deliverables
- ✅ Core query execution engine
- ✅ 50 operations (SELECT, INSERT, UPDATE, DELETE, etc.)
- ✅ 35+ format converters (SQL, GraphQL, Cypher, etc.)
- ✅ Type-aware execution (LINEAR, TREE, GRAPH, MATRIX)
- ✅ Capability checking system
- ✅ Operation registry and extensibility
- ✅ Basic test suite

### Success Criteria
- [x] Query engine executes on xwnode structures
- [x] Format conversion works between major formats
- [x] Type-aware optimization demonstrates performance gains
- [ ] 80%+ test coverage
- [ ] Documentation complete

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## Phase 1: Production Ready
**Version:** 1.x.x  
**Timeline:** Q1 2026  
**Status:** 🔵 **PLANNED**

### Goals
- Stabilize API
- Performance optimization
- Comprehensive error handling
- Production-grade logging and monitoring

### Deliverables
- Performance benchmarks and optimization
- Complete error handling and validation
- Logging and debugging tools
- Performance monitoring
- API stability guarantees
- 95%+ test coverage

### Success Criteria
- Sub-millisecond query parsing
- 10x performance vs manual operations
- Zero breaking API changes
- Production deployment examples

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## Phase 2: Query Optimization
**Version:** 2.x.x  
**Timeline:** Q2 2026  
**Status:** ⚪ **FUTURE**

### Goals
- Smart query planning
- Query optimization engine
- Cost-based execution
- Caching strategies

### Deliverables
- Query optimizer with cost estimation
- Execution plan visualization
- Query result caching
- Index utilization hints
- Query rewriting rules

### Success Criteria
- 5x performance improvement from optimization
- Automatic query plan selection
- Cache hit rate > 70%

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## Phase 3: Distributed Queries
**Version:** 3.x.x  
**Timeline:** Q3 2026  
**Status:** ⚪ **FUTURE**

### Goals
- Parallel query execution
- Distributed data support
- Streaming query results
- Real-time query processing

### Deliverables
- Parallel execution engine
- Distributed query coordinator
- Streaming result API
- Real-time subscriptions (SUBSCRIPTION operation)
- Worker pool management

### Success Criteria
- Linear scaling with worker count
- Streaming results for large datasets
- Real-time query subscriptions

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## Phase 4: Mars Standard Implementation
**Version:** 4.x.x  
**Timeline:** Q4 2026  
**Status:** ⚪ **FUTURE**

### Goals
- Universal data interchange
- Cross-platform interoperability
- Standard compliance
- Multi-language support

### Deliverables
- Mars Standard compliance
- Cross-language query format
- Interoperability with other systems
- Standard query protocol
- Multi-language client libraries

### Success Criteria
- 100% Mars Standard compliance
- Interoperability tests pass
- Client libraries for 3+ languages

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## Development Principles

### 1. **Usability First**
- Simple, intuitive API
- SQL-like familiar syntax
- Clear error messages
- Comprehensive examples

### 2. **Maintainability**
- Clean, well-organized code
- Comprehensive tests
- Clear documentation
- Design patterns throughout

### 3. **Performance**
- Type-aware optimization
- Efficient execution
- Minimal overhead
- Smart caching

### 4. **Extensibility**
- Plugin system for operations
- Custom format converters
- Flexible execution strategies
- Open architecture

### 5. **Security**
- Input validation
- SQL injection prevention
- Resource limits
- Defense-in-depth

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## Current Status

### Completed
- ✅ Project structure
- ✅ Core query engine
- ✅ 50 operations implementation
- ✅ 35+ format converters
- ✅ Type-aware execution
- ✅ Capability checking
- ✅ Test framework

### In Progress
- 🔄 Test coverage expansion
- 🔄 Documentation completion
- 🔄 Example applications
- 🔄 Performance benchmarking

### Next Steps
1. Complete test coverage
2. Performance optimization
3. API documentation
4. Example applications
5. Release version 1.0.0

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## Version History

### 0.0.1 (October 11, 2025)
- Initial extraction from xwnode
- Core query engine established
- 50 operations implemented
- 35+ format converters
- Type-aware execution
- Basic test suite

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*This document will be updated as the project progresses through each phase.*

