Heinonline HeinOnline is a premier online database containing more than 150 million pages and 200,000 titles of legal history and government documents in a fully searchable, image-based format. HeinOnline bridges the gap in historical research by providing comprehensive coverage from inception of more than 2,500 law-related periodicals. In addition to its vast collection of law journals, HeinOnline contains the entire Congressional Record, Federal Register, and Code of Federal Regulations, complete coverage of the U.S. Reports back to 1754, and entire databases dedicated to treaties, constitutions, case law, world trials, classic treatises, international trade, foreign relations, U.S. Presidents, and much more.