ProjectionMethod

ProjectionMethod identifies the orthographic projection standard—first-angle or third-angle—used in the drawing. This information is critical for interpreting view relationships correctly, since the same geometry appears on opposite sides depending on the projection. The model records the detected method as an enum value together with a reference id linking it back to the drawing. Downstream consumers can use it to orient CAD overlays, verify supplier preferences, or flag drawings that require operator awareness before machining. Having the projection method stored centrally also simplifies training datasets and analytics that compare drawings across different regions or customer bases.

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class ProjectionMethod(Reference):
    """Projection Method according to ISO 128"""

    projection_method: ProjectionMethodType