DTD Validator

The DTD Validator checks XML documents against a provided DTD to enforce defined element structures, attribute declarations, and entity usage. It supports strings or URLs for both XML content and the DTD, returning a structured result suitable for automation. Conceptually, validation involves parsing the XML, loading the DTD, applying rules for element nesting, attribute presence, and entity definitions, and reporting any deviations. The tool is beneficial for developers validating data exchanges, publishers ensuring document integrity, and data teams enforcing consistency across pipelines. Core value lies in early error discovery, precise location reporting, and clean integration into CI/CD or data workflows. Advanced users can enable parameter entities and ID/IDREF checks, while keeping external entity processing safe by default. Use cases include validating configuration feeds, technical documentation, and data exchange documents before ingestion into downstream systems. The tool emphasizes deterministic outcomes, reproducible results, and machine-readable reports to support automated QA and traceability.