bim-validation-pipeline

BIM 検証パイプライン

概要

DDC の方法論（第 4.3 章）に基づくこのスキルでは、BIM データの検証パイプラインを自動化できます。BIM モデルを Information Delivery Specification（IDS）、Level of Development（LOD）の要件、およびプロジェクト標準に照らして検証します。

書籍の参考資料：「Автоматический ETL конвейер для валидации данных」／「データ検証のための自動 ETL パイプライン」

「BIM データの自動検証により、初期段階でエラーを検出し、BEP 要件への適合を確保できます。」 — DDC Book、第 4.3 章

クイックスタート

import ifcopenshell
import pandas as pd

# Load IFC model
ifc_model = ifcopenshell.open("model.ifc")

# Quick validation checks
walls = ifc_model.by_type("IfcWall")
print(f"Total walls: {len(walls)}")

# Check for required properties
issues = []
for wall in walls:
    # Check if wall has material
    if not wall.HasAssociations:
        issues.append(f"Wall {wall.GlobalId}: No material assigned")

print(f"Issues found: {len(issues)}")

BIM 検証フレームワーク

コア検証クラス

import ifcopenshell
import ifcopenshell.util.element as element_util
import pandas as pd
from dataclasses import dataclass
from typing import List, Dict, Optional
from enum import Enum

class Severity(Enum):
    ERROR = "error"
    WARNING = "warning"
    INFO = "info"

@dataclass
class ValidationIssue:
    element_id: str
    element_type: str
    rule_id: str
    severity: Severity
    message: str
    location: Optional[str] = None

class BIMValidator:
    """Comprehensive BIM model validator"""

    def __init__(self, ifc_path: str):
        self.model = ifcopenshell.open(ifc_path)
        self.issues: List[ValidationIssue] = []
        self.stats = {}

    def validate_all(self):
        """Run all validation checks"""
        self.validate_geometry()
        self.validate_properties()
        self.validate_relationships()
        self.validate_naming()
        self.validate_classification()
        return self.get_report()

    def validate_geometry(self):
        """Check geometry validity"""
        elements_with_geometry = [
            e for e in self.model.by_type("IfcProduct")
            if e.Representation
        ]

        for element in elements_with_geometry:
            # Check for zero volume
            try:
                settings = ifcopenshell.geom.settings()
                shape = ifcopenshell.geom.create_shape(settings, element)
                # Volume check would go here
            except:
                self.issues.append(ValidationIssue(
                    element_id=element.GlobalId,
                    element_type=element.is_a(),
                    rule_id="GEO-001",
                    severity=Severity.ERROR,
                    message="Invalid or missing geometry"
                ))

        self.stats['elements_with_geometry'] = len(elements_with_geometry)

    def validate_properties(self, required_psets: Dict[str, List[str]] = None):
        """Check required property sets and properties"""
        if required_psets is None:
            required_psets = {
                'IfcWall': ['Pset_WallCommon', 'BaseQuantities'],
                'IfcSlab': ['Pset_SlabCommon', 'BaseQuantities'],
                'IfcColumn': ['Pset_ColumnCommon', 'BaseQuantities'],
                'IfcBeam': ['Pset_BeamCommon', 'BaseQuantities']
            }

        for ifc_type, psets in required_psets.items():
            elements = self.model.by_type(ifc_type)

            for element in elements:
                element_psets = element_util.get_psets(element)

                for required_pset in psets:
                    if required_pset not in element_psets:
                        self.issues.append(ValidationIssue(
                            element_id=element.GlobalId,
                            element_type=ifc_type,
                            rule_id="PROP-001",
                            severity=Severity.WARNING,
                            message=f"Missing PropertySet: {required_pset}"
                        ))

    def validate_relationships(self):
        """Check spatial containment and relationships"""
        products = self.model.by_type("IfcProduct")

        for product in products:
            # Check spatial containment
            if hasattr(product, 'ContainedInStructure'):
                if not product.ContainedInStructure:
                    self.issues.append(ValidationIssue(
                        element_id=product.GlobalId,
                        element_type=product.is_a(),
                        rule_id="REL-001",
                        severity=Severity.WARNING,
                        message="Element not assigned to building storey"
                    ))

            # Check material assignment
            if hasattr(product, 'HasAssociations'):
                has_material = any(
                    rel.is_a('IfcRelAssociatesMaterial')
                    for rel in (product.HasAssociations or [])
                )
                if not has_material and product.is_a() in ['IfcWall', 'IfcSlab', 'IfcColumn']:
                    self.issues.append(ValidationIssue(
                        element_id=product.GlobalId,
                        element_type=product.is_a(),
                        rule_id="MAT-001",
                        severity=Severity.WARNING,
                        message="No material assigned"
                    ))

    def validate_naming(self, patterns: Dict[str, str] = None):
        """Validate element naming conventions"""
        import re

        if patterns is None:
            patterns = {
                'IfcBuildingStorey': r'^(Level|L|Floor|Уровень)\s*[-]?\d+',
                'IfcWall': r'^W[-_]?\d{3,}|^Wall[-_]',
                'IfcColumn': r'^C[-_]?\d{3,}|^Column[-_]',
                'IfcSpace': r'^Room[-_]|^Space[-_]'
            }

        for ifc_type, pattern in patterns.items():
            elements = self.model.by_type(ifc_type)

            for element in elements:
                name = element.Name or ""
                if not re.match(pattern, name, re.IGNORECASE):
                    self.issues.append(ValidationIssue(
                        element_id=element.GlobalId,
                        element_type=ifc_type,
                        rule_id="NAME-001",
                        severity=Severity.INFO,
                        message=f"Name '{name}' doesn't match convention"
                    ))

    def validate_classification(self, required_systems: List[str] = None):
        """Check classification system assignments"""
        if required_systems is None:
            required_systems = ['Uniclass', 'OmniClass', 'Uniformat']

        elements = self.model.by_type("IfcProduct")

        for element in elements:
            if hasattr(element, 'HasAssociations'):
                has_classification = any(
                    rel.is_a('IfcRelAssociatesClassification')
                    for rel in (element.HasAssociations or [])
                )

                if not has_classification:
                    self.issues.append(ValidationIssue(
                        element_id=element.GlobalId,
                        element_type=element.is_a(),
                        rule_id="CLASS-001",
                        severity=Severity.INFO,
                        message="No classification assigned"
                    ))

    def get_report(self):
        """Generate validation report"""
        by_severity = {s: [] for s in Severity}
        by_type = {}
        by_rule = {}

        for issue in self.issues:
            by_severity[issue.severity].append(issue)

            if issue.element_type not in by_type:
                by_type[issue.element_type] = []
            by_type[issue.element_type].append(issue)

            if issue.rule_id not in by_rule:
                by_rule[issue.rule_id] = []
            by_rule[issue.rule_id].append(issue)

        return {
            'total_issues': len(self.issues),
            'errors': len(by_severity[Severity.ERROR]),
            'warnings': len(by_severity[Severity.WARNING]),
            'info': len(by_severity[Severity.INFO]),
            'by_type': {k: len(v) for k, v in by_type.items()},
            'by_rule': {k: len(v) for k, v in by_rule.items()},
            'issues': self.issues,
            'stats': self.stats
        }

LOD 検証

Level of Development チェッカー

class LODValidator:
    """Validate Level of Development (LOD) requirements"""

    # LOD requirements by element type
    LOD_REQUIREMENTS = {
        'LOD100': {
            'geometry': False,
            'properties': [],
            'description': 'Conceptual'
        },
        'LOD200': {
            'geometry': True,
            'approximate_size': True,
            'properties': ['Category'],
            'description': 'Schematic Design'
        },
        'LOD300': {
            'geometry': True,
            'exact_size': True,
            'properties': ['Category', 'Material', 'Type'],
            'quantities': ['Length', 'Area', 'Volume'],
            'description': 'Design Development'
        },
        'LOD350': {
            'geometry': True,
            'exact_size': True,
            'properties': ['Category', 'Material', 'Type', 'Manufacturer'],
            'quantities': ['Length', 'Area', 'Volume', 'Weight'],
            'connections': True,
            'description': 'Construction Documentation'
        },
        'LOD400': {
            'geometry': True,
            'fabrication_ready': True,
            'properties': ['Category', 'Material', 'Type', 'Manufacturer',
                          'Model', 'Serial', 'InstallationDate'],
            'quantities': ['All'],
            'connections': True,
            'description': 'Fabrication & Assembly'
        }
    }

    def __init__(self, model, target_lod='LOD300'):
        self.model = model
        self.target_lod = target_lod
        self.requirements = self.LOD_REQUIREMENTS.get(target_lod, {})
        self.results = []

    def validate_element(self, element):
        """Validate single element against LOD requirements"""
        issues = []
        element_guid = element.GlobalId
        psets = element_util.get_psets(element)

        # Check geometry
        if self.requirements.get('geometry'):
            if not element.Representation:
                issues.append({
                    'element': element_guid,
                    'issue': 'Missing geometry',
                    'required_for': self.target_lod
                })

        # Check required properties
        required_props = self.requirements.get('properties', [])
        all_props = {}
        for pset_name, props in psets.items():
            all_props.update(props)

        for prop in required_props:
            if prop not in all_props or all_props[prop] is None:
                issues.append({
                    'element': element_guid,
                    'issue': f'Missing property: {prop}',
                    'required_for': self.target_lod
                })

        # Check quantities
        required_quantities = self.requirements.get('quantities', [])
        if required_quantities != ['All']:
            qsets = psets.get('BaseQuantities', {})
            for qty in required_quantities:
                if qty not in qsets:
                    issues.append({
                        'element': element_guid,
                        'issue': f'Missing quantity: {qty}',
                        'required_for': self.target_lod
                    })

        return issues

    def validate_model(self, element_types=None):
        """Validate entire model"""
        if element_types is None:
            element_types = ['IfcWall', 'IfcSlab', 'IfcColumn', 'IfcBeam',
                            'IfcDoor', 'IfcWindow', 'IfcStair']

        all_issues = []
        summary = {}

        for ifc_type in element_types:
            elements = self.model.by_type(ifc_type)
            type_issues = []

            for element in elements:
                issues = self.validate_element(element)
                type_issues.extend(issues)

            summary[ifc_type] = {
                'total': len(elements),
                'issues': len(type_issues),
                'compliance': ((len(elements) - len(type_issues)) /
                              len(elements) * 100) if elements else 100
            }
            all_issues.extend(type_issues)

        return {
            'target_lod': self.target_lod,
            'total_issues': len(all_issues),
            'summary': summary,
            'issues': all_issues
        }

IDS 検証

Information Delivery Specification

import xml.etree.ElementTree as ET

class IDSValidator:
    """Validate against IDS (Information Delivery Specification)"""

    def __init__(self, ids_path: str):
        self.ids = self._parse_ids(ids_path)

    def _parse_ids(self, path):
        """Parse IDS XML file"""
        tree = ET.parse(path)
        root = tree.getroot()

        specifications = []
        for spec in root.findall('.//specification'):
            specifications.append({
                'name': spec.get('name'),
                'applicability': self._parse_facets(spec.find('applicability')),
                'requirements': self._parse_facets(spec.find('requirements'))
            })

        return specifications

    def _parse_facets(self, element):
        """Parse IDS facets"""
        if element is None:
            return []

        facets = []
        for child in element:
            facet = {
                'type': child.tag,
                'constraints': {}
            }
            for attr, value in child.attrib.items():
                facet['constraints'][attr] = value
            facets.append(facet)

        return facets

    def validate(self, model):
        """Validate IFC model against IDS"""
        results = []

        for spec in self.ids:
            applicable_elements = self._find_applicable_elements(
                model, spec['applicability']
            )

            for element in applicable_elements:
                issues = self._check_requirements(element, spec['requirements'])
                if issues:
                    results.append({
                        'specification': spec['name'],
                        'element': element.GlobalId,
                        'issues': issues
                    })

        return results

    def _find_applicable_elements(self, model, applicability):
        """Find elements matching applicability criteria"""
        elements = []

        for facet in applicability:
            if facet['type'] == 'entity':
                ifc_type = facet['constraints'].get('name')
                if ifc_type:
                    elements.extend(model.by_type(ifc_type))

        return elements

    def _check_requirements(self, element, requirements):
        """Check element against requirements"""
        issues = []
        psets = element_util.get_psets(element)

        for req in requirements:
            if req['type'] == 'property':
                pset_name = req['constraints'].get('propertySet')
                prop_name = req['constraints'].get('name')

                if pset_name and prop_name:
                    pset = psets.get(pset_name, {})
                    if prop_name not in pset:
                        issues.append(f"Missing property: {pset_name}.{prop_name}")

        return issues

パイプラインの自動化

自動検証パイプライン

import os
from datetime import datetime
import json

class BIMValidationPipeline:
    """Automated BIM validation pipeline"""

    def __init__(self, config_path=None):
        self.config = self._load_config(config_path)
        self.results_history = []

    def _load_config(self, path):
        if path and os.path.exists(path):
            with open(path) as f:
                return json.load(f)

        return {
            'lod_target': 'LOD300',
            'required_psets': {
                'IfcWall': ['Pset_WallCommon'],
                'IfcSlab': ['Pset_SlabCommon']
            },
            'naming_patterns': {},
            'fail_on_errors': True,
            'warn_threshold': 50
        }

    def run(self, ifc_path):
        """Run complete validation pipeline"""
        start_time = datetime.now()

        # Initialize validators
        validator = BIMValidator(ifc_path)
        lod_validator = LODValidator(
            validator.model,
            self.config['lod_target']
        )

        # Run validations
        bim_report = validator.validate_all()
        lod_report = lod_validator.validate_model()

        # Compile results
        result = {
            'file': ifc_path,
            'timestamp': start_time.isoformat(),
            'duration_seconds': (datetime.now() - start_time).total_seconds(),
            'bim_validation': bim_report,
            'lod_validation': lod_report,
            'passed': self._evaluate_pass(bim_report, lod_report)
        }

        self.results_history.append(result)
        return result

    def _evaluate_pass(self, bim_report, lod_report):
        """Determine if validation passed"""
        if self.config['fail_on_errors'] and bim_report['errors'] > 0:
            return False

        if bim_report['warnings'] > self.config['warn_threshold']:
            return False

        return True

    def run_batch(self, ifc_paths):
        """Run validation on multiple files"""
        results = []
        for path in ifc_paths:
            try:
                result = self.run(path)
                results.append(result)
            except Exception as e:
                results.append({
                    'file': path,
                    'error': str(e),
                    'passed': False
                })

        return {
            'total': len(results),
            'passed': sum(1 for r in results if r.get('passed', False)),
            'failed': sum(1 for r in results if not r.get('passed', True)),
            'results': results
        }

    def export_report(self, output_path):
        """Export validation results to Excel"""
        if not self.results_history:
            return None

        latest = self.results_history[-1]

        with pd.ExcelWriter(output_path, engine='openpyxl') as writer:
            # Summary
            summary = pd.DataFrame({
                'Metric': ['File', 'Timestamp', 'Passed', 'Errors', 'Warnings'],
                'Value': [
                    latest['file'],
                    latest['timestamp'],
                    latest['passed'],
                    latest['bim_validation']['errors'],
                    latest['bim_validation']['warnings']
                ]
            })
            summary.to_excel(writer, sheet_name='Summary', index=False)

            # Issues
            if latest['bim_validation']['issues']:
                issues_df = pd.DataFrame([
                    {
                        'Element': i.element_id,
                        'Type': i.element_type,
                        'Rule': i.rule_id,
                        'Severity': i.severity.value,
                        'Message': i.message
                    }
                    for i in latest['bim_validation']['issues']
                ])
                issues_df.to_excel(writer, sheet_name='Issues', index=False)

        return output_path

クイックリファレンス

ルール ID	説明	重大度
GEO-001	ジオメトリが無効または欠落しています	ERROR
PROP-001	PropertySet が欠落しています	WARNING
REL-001	空間的な包含関係がありません	WARNING
MAT-001	マテリアルが割り当てられていません	WARNING
NAME-001	命名規則が無効です	INFO
CLASS-001	分類がありません	INFO

LOD 要件の概要

LOD	ジオメトリ	プロパティ	数量
100	なし	-	-
200	概算	カテゴリ	-
300	正確	マテリアル、タイプ	L、A、V
350	正確＋接続部	製造元	すべて
400	製作可能な詳細度	すべての詳細	すべて

リソース

• 書籍：Artem Boiko 著『Data-Driven Construction』第 4.3 章
• ウェブサイト：https://datadrivenconstruction.io
• IDS 標準：https://technical.buildingsmart.org/projects/information-delivery-specification-ids/
• IfcOpenShell：https://ifcopenshell.org

次のステップ

• IFC からデータを抽出するには、ifc-data-extraction を参照してください
• 一般的なデータ検証については、data-quality-check を参照してください
• 検証済みモデルから数量を算出するには、qto-report を参照してください