Identifier

Identifier contains textual identifiers extracted from the drawing, such as part numbers, drawing numbers, or order numbers. It stores the identifier value, an identifier type classifying what kind of number it is, and a reference id linking it back to the drawing. Having identifiers in a structured model enables reliable cross-referencing between balloons, BOM rows, and title blocks. You can use it to map drawings to ERP records, trigger version comparisons, or build navigation interfaces that jump to specific sections. The object also captures language metadata, the stakeholder the identifier belongs to (supplier, owner, or customer), and the period it applies to (previous, current, or future), so your downstream systems can reconcile variations automatically.

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class Identifier(Entry):
    """
    Represents an identifier (such as the drawing number) used for distinguishing elements in a drawing.
    """

    identifier_type: IdentifierType = Field(
        ..., description="The type of identifier, such as part ID or drawing ID."
    )

    stakeholder: Optional[IdentifierStakeholder] = Field(
        None,
        description="The associated stakeholder, if known.",
        examples=[IdentifierStakeholder.SUPPLIER, IdentifierStakeholder.OWNER],
    )

    period: Optional[IdentifierPeriod] = Field(
        None,
        description="The associated period, if known.",
        examples=[IdentifierPeriod.PREVIOUS, IdentifierPeriod.CURRENT],
    )