BillOfMaterial

The BillOfMaterial model encapsulates the entire bill of materials section of a technical drawing. It aggregates every extracted row alongside overarching properties like the title block identifiers, sheet references, and optional footnotes that describe the table as a whole. By keeping the BOM in a dedicated object you can treat it as a cohesive dataset for inventory planning, version control, or compliance checks. The model ensures the order of entries is preserved, captures headers and units, and links back to balloons or feature callouts where available. Use this class when you want to reconstruct the assembly hierarchy, audit part substitutions across revisions, or synchronize engineered requirements with ERP and PLM systems without manually copying data from PDF drawings.

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class BillOfMaterial(Reference):
    """
    Represents a bill of material (BOM) table in a technical drawing.
    """

    rows: List[BillOfMaterialRow] = Field(
        ...,
        description="List of rows in the bill of material.",
    )