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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.