GDnT

GDnT aggregates all geometric dimensioning and tolerancing data associated with a drawing. The model bundles feature control frames, datum definitions, modifiers, and contextual notes, giving you a holistic view of how form, fit, and function are controlled. It serves as the root structure that connects individual GD&T components so downstream software can analyze them together, determine compliance with standards, or simulate permissible variation. The object also stores metadata about detection confidence, standards referenced, and sheet locations, supporting auditability. Use this object when you need to extract the complete GD&T schema for digital twin analysis, inspection planning, process capability studies, or change management across drawing revisions.

Bases: Feature

Represents a GD&T (Geometric Dimensioning and Tolerancing) cue in a technical drawing.

PARAMETER	DESCRIPTION
`reference_id`	Reference ID to identify the object. TYPE: `int`
`label`	A short description of the feature in a human-readable format. TYPE: `str`
`confidence`	Confidence in the feature extraction or interpretation. TYPE: `Confidence \| None`
`characteristic`	The GD&T characteristic being controlled (e.g., flatness, circularity). TYPE: `GDnTCharacteristic`
`zone`	The tolerance zone defined for the characteristic. TYPE: `GDnTZone \| None`
`feature`	The feature being controlled by the GD&T characteristic. TYPE: `GDnTFeature \| None`
`reference`	The reference for the GD&T characteristic. TYPE: `GDnTReference \| None`
`material_condition`	Material condition (e.g., maximum material condition). TYPE: `GDnTMaterialCondition \| None` DEFAULT: `None`
`state`	State of the feature (e.g., free state). TYPE: `GDnTState \| None` DEFAULT: `None`
`datums`	List of datums used as references for the GD&T characteristic. TYPE: `list[GDnTDatum]` DEFAULT: `<dynamic>`

Source code in werk24/models/v2/models.py

class GDnT(Feature):
    """
    Represents a GD&T (Geometric Dimensioning and Tolerancing) cue in a technical drawing.
    """

    characteristic: GDnTCharacteristic = Field(
        ...,
        description="The GD&T characteristic being controlled (e.g., flatness, circularity).",
    )
    zone: Optional[GDnTZone] = Field(
        ..., description="The tolerance zone defined for the characteristic."
    )
    feature: Optional[GDnTFeature] = Field(
        ..., description="The feature being controlled by the GD&T characteristic."
    )
    reference: Optional[GDnTReference] = Field(
        ..., description="The reference for the GD&T characteristic."
    )
    material_condition: Optional[GDnTMaterialCondition] = Field(
        None, description="Material condition (e.g., maximum material condition)."
    )
    state: Optional[GDnTState] = Field(
        None, description="State of the feature (e.g., free state)."
    )
    datums: list[GDnTDatum] = Field(
        default_factory=list,
        description="List of datums used as references for the GD&T characteristic.",
    )