Source Schema Validator

Software componentKnowledge & DataKnowledge & Dataarc:SourceSchemaValidator

A validation component that checks extracted records or API responses against the expected source schema, surfacing source schema or API contract changes before processing.

Responsibility. Detects mismatches between source data and the expected extraction schema.

Also known as: Schema drift detector, API response validator, Startup schema validation

Direct neighbourhood (hover for relationship types)

Relationships

sends data to dynamic

Alert Manager Ch6.3A

guards control

Design guidance

SHOULD validate source schemas at pipeline startup so mismatches are detected before processing begins.
SHOULD alert engineers when API response structures change rather than silently returning empty results.

Classification

Patterns: Explicit column selectionStartup schema validationResponse model validation
Technologies: Pydantic
Quality attributes: Reliability (ISO/IEC 25010 | NIST AI RMF: valid and reliable)
Risks mitigated: Extraction breakage from added/removed/renamed columnsSilent empty results after API contract changesAPI version deprecation

Sources

Ch6.3A: T. Nguyen, "ETL Pipeline Fundamentals," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 6.3A. ISBN: 9798244538229.