Structured Element Extraction And Classification

via “structured element type hierarchy with rich metadata extraction”

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Unique: Uses a hierarchical element type system (unstructured/documents/elements.py 149-435) with inheritance-based polymorphism where specialized elements (Table, Image) extend base Element class with type-specific metadata (table cells, image dimensions). Metadata is preserved through serialization via ID management and coordinate tracking, enabling lossless round-trip conversion.