ISO 23952 QIF Digital Metrology & GD&T (.qif, .xml)

@modelscript/qif (languages/qif) provides native WebAssembly parsing, ASME Y14.5 / ISO 1101 Geometric Dimensioning and Tolerancing (GD&T) validation, Statistical Process Control (SPC) capability evaluation ($C_p$, $C_{pk}$, Test Uncertainty Ratio $\text{TUR}$), STEP AP242 PMI reconciliation, and DAEBuilder / Modelica / SysML v2 lowering for ISO 23952 Quality Information Framework (QIF 3.0) metrology documents.

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Supported Extensions & Standards

Extension	Format	Description
.qif	ISO 23952 QIF 3.0	XML document encoding QIF MBD features, datum reference frames, GD&T characteristics, measurement plans, and CMM actual results
.xml	QIF XML	Standard QIF XML schema document with persistent QPID UUIDs

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Key Capabilities

1. MBD Features, Datums & GD&T Characteristics

• Parses QIF Model-Based Definition (QIFDocument) sections:
  • Datum Definitions & Reference Frames (DatumDefinitions, DatumReferenceFrames): Primary, secondary, and tertiary datum precedence with material condition modifiers (MMC, LMC, RFS).
  • Features (FeatureDefinitions, FeatureItems): Cylindrical, planar, spherical, and point geometric features with nominal locations and normals.
  • Characteristics (CharacteristicDefinitions, CharacteristicItems): Dimensional tolerances, flatness, cylindricity, perpendicularity, true position, and surface profile tolerances.

2. Statistical Process Control (SPC) & Test Uncertainty Ratio (TUR)

• Evaluates measured Coordinate Measuring Machine (CMM) actuals (MeasurementsResults) against nominal tolerances:$$C_p=\frac{\text{USL}-\text{LSL}}{6\sigma },C_{pk}=min(\frac{\text{USL}-\mu }{3\sigma },\frac{\mu -\text{LSL}}{3\sigma }),\text{TUR}=\frac{\text{Tolerance}}{2U_{\text{cal}}}$$
• Flags processes with $C_{pk}<1.33$ or measurement devices violating the $4:1$ $\text{TUR}$ metrology rule.

3. STEP AP242 Reconciliation & DAE Lowering

• Reconciles QIF inspection characteristics directly against ISO 10303-21 STEP AP242 CAD geometry (reconcileStepWithQif) or synthesizes baseline QIF inspection plans from STEP PMI (synthesizeQifFromStep).
• Lowers tolerance stack-ups and CMM measurement equations into @modelscript/runtime's DAEBuilder arena and projects them into Modelica and SysML v2 verification models.

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Pre-Flight Diagnostics

9 rules8 error1 warning

Code	Rule	Severity	Message
M8101	qif-unresolved-qpid	error	Unresolved <refKind> reference '<refId>' in '<contextName>'.
M8102	qif-duplicate-qpid	error	Duplicate identifier or QPId '<idOrQpId>' declared on '<elementName>'.
M8103	qif-invalid-datum-precedence	error	Duplicate datum label '<datumLabel>' in DatumReferenceFrame of characteristic '<charName>'.
M8104	qif-invalid-material-modifier	error	Material condition modifier '<modifier>' cannot be applied to '<targetDesc>' in characteristic '<charName>'.
M8105	qif-composite-frame-mismatch	error	Composite lower-tier tolerance '<lowerTol>' must be strictly less than upper-tier tolerance '<upperTol>' in characteristic '<charName>'.
M8106	qif-insufficient-probing-points	error	Probing point count '<actualPoints>' is below minimum required '<requiredPoints>' for '<featureType>' in '<targetName>'.
M8107	qif-tur-uncertainty-warning	warning	Test Uncertainty Ratio '<tur>:1' is below required minimum '<minTur>:1' for device '<deviceName>' on characteristic '<charName>'.
M8108	qif-out-of-tolerance-actual	error	Actual '<actualId>' has measured value '<measuredVal>' against effective tolerance '<effTol>' but is marked '<status>' for characteristic '<charName>'.
M8109	qif-unresolved-step-entity	error	Referenced STEP AP242 entity '<stepEntityId>' on feature '<featureName>' was not found in the CAD model.

Generated from languages/qif/src/lints/rules.ts. All languages →

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CLI Usage

# Inspect QIF datums, features, GD&T characteristics, and CMM actuals
msx qif inspect TurbineBladeInspection.qif

# Validate ASME Y14.5 GD&T datum frames, QPIDs, and TUR ratios
msx qif validate TurbineBladeInspection.qif

# Compute Statistical Process Control (Cp, Cpk, pass/fail) metrics
msx qif spc TurbineBladeInspection.qif

# Reconcile QIF inspection characteristics against a STEP AP242 CAD assembly
msx qif reconcile-step TurbineBladeInspection.qif --step=TurbineBlade.step

# Project QIF tolerances to SysML v2 or Modelica
msx qif to-sysml TurbineBladeInspection.qif -o BladeMetrology.sysml
msx qif to-modelica TurbineBladeInspection.qif -o BladeMetrology.mo