Crossref performs a post-deposited metadata quality check on all journal, book, and conference proceedings submissions. Any identified errors may affect overall metadata quality and negatively affect queries for your content. Errors are aggregated and sent out weekly via email as the 'Schematron report'. The report contains links (organized by title) to .xml files containing error details. The XML files can be downloaded and processed programmatically, or viewed in a web browser:
Schematron is a pattern-based XML validation language, more information is available at http://www.schematron.com/. Crossref's Schematron rules may be downloaded (below) for batch processing.