Smart Document Generator
Open Law Library is a DC-based startup (NGO) aiming to make the law widely accessible to all for free in a high-quality format.
As this was indeed a complex library, here are some of the key aspects I've faced:
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Implemented highly optimized recursive algorithms and handlers in Python for XML processing 
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Optimized and profiled Python handlers for high-volume data transformation, enabling generation of thousand-page documents 
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Employed Test-Driven Development (TDD) to ensure high quality and transformation accuracy 
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Created a Bidirectional XML Transformer with Round-Trip Integrity ( XML ↔ DOCX), synchronizing parser and transformer components, putting high emphasis on data integrity checks
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Extended python-docx library with custom features adhering to OOXML standard, including support for content controls with public contributions: https://github.com/openlawlibrary/python-docx 
As all input data is in the public domain, you can see example: https://github.com/DCCouncil/law-xml