Track data origin, transformations, and flow through construction systems. Essential for audit trails, compliance, and debugging data issues.
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Track the origin, transformations, and flow of construction data through systems. Provides audit trails for compliance, helps debug data issues, and ensures data governance.
Construction projects require data accountability:
from dataclasses import dataclass, field from typing import List, Dict, Any, Optional, Set from datetime import datetime from enum import Enum import json import hashlib import uuidclass TransformationType(Enum): EXTRACT = "extract" TRANSFORM = "transform" LOAD = "load" AGGREGATE = "aggregate" JOIN = "join" FILTER = "filter" CALCULATE = "calculate" MANUAL_EDIT = "manual_edit" IMPORT = "import" EXPORT = "export"
@dataclass class DataSource: id: str name: str system: str location: str owner: str created_at: datetime
@dataclass class TransformationStep: id: str transformation_type: TransformationType description: str input_entities: List[str] output_entities: List[str] logic: str # SQL, Python, or description performed_by: str # user or system performed_at: datetime parameters: Dict[str, Any] = field(default_factory=dict)
@dataclass class DataEntity: id: str name: str source_id: str entity_type: str # table, file, field, record created_at: datetime version: int = 1 checksum: Optional[str] = None parent_entities: List[str] = field(default_factory=list) metadata: Dict[str, Any] = field(default_factory=dict)
@dataclass class LineageRecord: id: str entity_id: str transformation_id: str upstream_entities: List[str] downstream_entities: List[str] recorded_at: datetime
class ConstructionDataLineageTracker: """Track data lineage for construction data flows."""
def __init__(self, project_id: str): self.project_id = project_id self.sources: Dict[str, DataSource] = {} self.entities: Dict[str, DataEntity] = {} self.transformations: Dict[str, TransformationStep] = {} self.lineage_records: List[LineageRecord] = [] def register_source(self, name: str, system: str, location: str, owner: str) -> DataSource: """Register a new data source.""" source = DataSource( id=f"SRC-{uuid.uuid4().hex[:8]}", name=name, system=system, location=location, owner=owner, created_at=datetime.now() ) self.sources[source.id] = source return source def register_entity(self, name: str, source_id: str, entity_type: str, parent_entities: List[str] = None, metadata: Dict = None) -> DataEntity: """Register a data entity (table, file, field).""" entity = DataEntity( id=f"ENT-{uuid.uuid4().hex[:8]}", name=name, source_id=source_id, entity_type=entity_type, created_at=datetime.now(), parent_entities=parent_entities or [], metadata=metadata or {} ) self.entities[entity.id] = entity return entity def calculate_checksum(self, data: Any) -> str: """Calculate checksum for data verification.""" if isinstance(data, str): content = data else: content = json.dumps(data, sort_keys=True, default=str) return hashlib.sha256(content.encode()).hexdigest()[:16] def record_transformation(self, transformation_type: TransformationType, description: str, input_entities: List[str], output_entities: List[str], logic: str, performed_by: str, parameters: Dict = None) -> TransformationStep: """Record a data transformation.""" transformation = TransformationStep( id=f"TRF-{uuid.uuid4().hex[:8]}", transformation_type=transformation_type, description=description, input_entities=input_entities, output_entities=output_entities, logic=logic, performed_by=performed_by, performed_at=datetime.now(), parameters=parameters or {} ) self.transformations[transformation.id] = transformation # Create lineage records for output_id in output_entities: record = LineageRecord( id=f"LIN-{uuid.uuid4().hex[:8]}", entity_id=output_id, transformation_id=transformation.id, upstream_entities=input_entities, downstream_entities=[], recorded_at=datetime.now() ) self.lineage_records.append(record) # Update downstream references for input entities for input_id in input_entities: for existing_record in self.lineage_records: if existing_record.entity_id == input_id: existing_record.downstream_entities.append(output_id) return transformation def trace_upstream(self, entity_id: str, depth: int = None) -> List[Dict]: """Trace all upstream sources of an entity.""" visited = set() lineage = [] def trace(eid: str, current_depth: int): if eid in visited: return if depth is not None and current_depth > depth: return visited.add(eid) entity = self.entities.get(eid) if not entity: return # Find transformations that produced this entity for record in self.lineage_records: if record.entity_id == eid: transformation = self.transformations.get(record.transformation_id) if transformation: lineage.append({ 'entity': entity.name, 'entity_id': eid, 'depth': current_depth, 'transformation': transformation.description, 'transformation_type': transformation.transformation_type.value, 'performed_at': transformation.performed_at.isoformat(), 'performed_by': transformation.performed_by, 'upstream': record.upstream_entities }) for upstream_id in record.upstream_entities: trace(upstream_id, current_depth + 1) trace(entity_id, 0) return sorted(lineage, key=lambda x: x['depth']) def trace_downstream(self, entity_id: str, depth: int = None) -> List[Dict]: """Trace all downstream dependencies of an entity.""" visited = set() dependencies = [] def trace(eid: str, current_depth: int): if eid in visited: return if depth is not None and current_depth > depth: return visited.add(eid) entity = self.entities.get(eid) if not entity: return # Find entities that use this entity for record in self.lineage_records: if eid in record.upstream_entities: transformation = self.transformations.get(record.transformation_id) if transformation: dependencies.append({ 'entity': self.entities[record.entity_id].name if record.entity_id in self.entities else record.entity_id, 'entity_id': record.entity_id, 'depth': current_depth, 'transformation': transformation.description, 'transformation_type': transformation.transformation_type.value }) trace(record.entity_id, current_depth + 1) trace(entity_id, 0) return sorted(dependencies, key=lambda x: x['depth']) def get_entity_history(self, entity_id: str) -> List[Dict]: """Get complete history of changes to an entity.""" history = [] for record in self.lineage_records: if record.entity_id == entity_id: transformation = self.transformations.get(record.transformation_id) if transformation: history.append({ 'timestamp': transformation.performed_at.isoformat(), 'action': transformation.transformation_type.value, 'description': transformation.description, 'performed_by': transformation.performed_by, 'inputs': [ self.entities[eid].name if eid in self.entities else eid for eid in record.upstream_entities ] }) return sorted(history, key=lambda x: x['timestamp']) def impact_analysis(self, entity_id: str) -> Dict: """Analyze impact of changes to an entity.""" downstream = self.trace_downstream(entity_id) impact = { 'entity': self.entities[entity_id].name if entity_id in self.entities else entity_id, 'total_affected': len(downstream), 'affected_by_depth': {}, 'affected_entities': downstream } for dep in downstream: depth = dep['depth'] impact['affected_by_depth'][depth] = impact['affected_by_depth'].get(depth, 0) + 1 return impact def validate_lineage(self) -> List[str]: """Validate lineage for completeness and consistency.""" issues = [] # Check for orphan entities (no source or transformation) for eid, entity in self.entities.items(): has_lineage = any(r.entity_id == eid for r in self.lineage_records) if not has_lineage and entity.entity_type != 'source': issues.append(f"Entity '{entity.name}' has no lineage record") # Check for broken references all_entity_ids = set(self.entities.keys()) for record in self.lineage_records: for upstream_id in record.upstream_entities: if upstream_id not in all_entity_ids: issues.append(f"Lineage references unknown entity: {upstream_id}") # Check for circular dependencies for eid in self.entities: upstream = set() to_check = [eid] while to_check: current = to_check.pop() if current in upstream: issues.append(f"Circular dependency detected involving entity: {self.entities[eid].name}") break upstream.add(current) for record in self.lineage_records: if record.entity_id == current: to_check.extend(record.upstream_entities) return issues def generate_lineage_graph(self, entity_id: str) -> str: """Generate Mermaid diagram of lineage.""" lines = ["```mermaid", "graph LR"] upstream = self.trace_upstream(entity_id, depth=5) downstream = self.trace_downstream(entity_id, depth=5) # Add nodes added_nodes = set() for item in upstream + downstream: node_id = item['entity_id'].replace('-', '_') if node_id not in added_nodes: entity = self.entities.get(item['entity_id']) name = entity.name if entity else item['entity_id'] lines.append(f" {node_id}[{name}]") added_nodes.add(node_id) # Add target node target_node = entity_id.replace('-', '_') if target_node not in added_nodes: entity = self.entities.get(entity_id) name = entity.name if entity else entity_id lines.append(f" {target_node}[{name}]:::target") # Add edges for item in upstream: for upstream_id in item.get('upstream', []): from_node = upstream_id.replace('-', '_') to_node = item['entity_id'].replace('-', '_') lines.append(f" {from_node} --> {to_node}") for item in downstream: from_node = entity_id.replace('-', '_') to_node = item['entity_id'].replace('-', '_') if to_node != from_node: lines.append(f" {from_node} --> {to_node}") lines.append(" classDef target fill:#f96") lines.append("```") return "\n".join(lines) def export_lineage(self) -> Dict: """Export complete lineage data.""" return { 'project_id': self.project_id, 'exported_at': datetime.now().isoformat(), 'sources': {k: { 'id': v.id, 'name': v.name, 'system': v.system, 'location': v.location, 'owner': v.owner } for k, v in self.sources.items()}, 'entities': {k: { 'id': v.id, 'name': v.name, 'source_id': v.source_id, 'entity_type': v.entity_type, 'parent_entities': v.parent_entities } for k, v in self.entities.items()}, 'transformations': {k: { 'id': v.id, 'type': v.transformation_type.value, 'description': v.description, 'input_entities': v.input_entities, 'output_entities': v.output_entities, 'performed_by': v.performed_by, 'performed_at': v.performed_at.isoformat() } for k, v in self.transformations.items()}, 'lineage_records': [{ 'id': r.id, 'entity_id': r.entity_id, 'transformation_id': r.transformation_id, 'upstream_entities': r.upstream_entities } for r in self.lineage_records] } def generate_report(self) -> str: """Generate lineage report.""" lines = [f"# Data Lineage Report: {self.project_id}", ""] lines.append(f"**Generated:** {datetime.now().strftime('%Y-%m-%d %H:%M')}") lines.append(f"**Sources:** {len(self.sources)}") lines.append(f"**Entities:** {len(self.entities)}") lines.append(f"**Transformations:** {len(self.transformations)}") lines.append("") # Sources lines.append("## Data Sources") for source in self.sources.values(): lines.append(f"- **{source.name}** ({source.system})") lines.append(f" - Location: {source.location}") lines.append(f" - Owner: {source.owner}") lines.append("") # Validation issues = self.validate_lineage() if issues: lines.append("## Lineage Issues") for issue in issues: lines.append(f"- ⚠️ {issue}") lines.append("") # Transformation summary lines.append("## Transformation Summary") type_counts = {} for t in self.transformations.values(): type_counts[t.transformation_type.value] = type_counts.get(t.transformation_type.value, 0) + 1 for t_type, count in sorted(type_counts.items()): lines.append(f"- {t_type}: {count}") return "\n".join(lines)
# Initialize tracker tracker = ConstructionDataLineageTracker("PROJECT-001")Register sources
procore = tracker.register_source("Procore", "SaaS", "cloud", "PM Team") sage = tracker.register_source("Sage 300", "Database", "on-prem", "Finance")
Register entities
budget = tracker.register_entity("Project Budget", procore.id, "table") costs = tracker.register_entity("Job Costs", sage.id, "table") report = tracker.register_entity("Cost Variance Report", procore.id, "file")
Record transformation
tracker.record_transformation( transformation_type=TransformationType.JOIN, description="Join budget and actual costs for variance calculation", input_entities=[budget.id, costs.id], output_entities=[report.id], logic="SELECT b.*, c.actual, (b.budget - c.actual) as variance FROM budget b JOIN costs c ON b.cost_code = c.cost_code", performed_by="ETL Pipeline" )
Trace lineage
upstream = tracker.trace_upstream(report.id) print("Upstream lineage:", upstream)
Generate graph
print(tracker.generate_lineage_graph(report.id))
Export for audit
lineage_data = tracker.export_lineage()
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