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# mlgpx - OCaml GPX Library
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A high-quality OCaml library for parsing and generating GPX (GPS Exchange Format) files, designed with streaming performance and type safety in mind.
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An OCaml library for parsing and generating GPX (GPS Exchange Format) 1.0 and
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1.1 files, and a CLI for common manipulation and query options.
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## Architecture Overview
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## Key Features
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- ✅ **Complete GPX 1.1 support**: Waypoints, routes, tracks, metadata, extensions
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- ✅ **Complete GPX 1.0/1.1 support**: Waypoints, routes, tracks, metadata, extensions
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- ✅ **Streaming parser/writer**: Memory-efficient for large files
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- ✅ **Strong type safety**: Validated coordinates, GPS fix types, etc.
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- ✅ **Comprehensive validation**: Detailed error and warning reporting
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mlgpx convert --help
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mlgpx info --help
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```
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## Dependencies
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- **xmlm**: Streaming XML parser/writer (core dependency)
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- **ptime**: Time handling for timestamps
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- **unix**: File I/O operations (Unix layer only)
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## Testing Strategy
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- Unit tests for coordinate validation
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- Roundtrip tests (parse → write → parse)
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- Validation rule testing
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- Large file streaming tests
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- Cross-platform compatibility tests
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## Future Considerations
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### Potential Optimizations
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- Custom coordinate type with packed representation
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- Lazy extension parsing
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- Memory-mapped file reading for very large files
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- Streaming validation (validate while parsing)
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### API Extensions
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- GPX merging/splitting utilities
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- Coordinate transformation functions
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- Distance/bearing calculations
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- GPX statistics and analysis tools
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This architecture provides a solid foundation for GPX processing in OCaml with excellent type safety, performance, and extensibility.