The Martindale-Hubbell Law Digest summarizes and describes the laws of a given jurisdiction. These jurisdictions include: the United States; U.S. States and Possessions; U.S. Codes (Copyright, Patent, Trademark); Canada; Canadian Provinces; the European Union; and other countries. Each digest is revised annually by a law firm or academic researcher which is, in most cases, based in that jurisdiction. Digest content follows a hierarchical classification plan of: categories; topics; sub headings; catch lines; and cross references. The digest makes extensive use of statutory citations and presents many legal forms in facsimile.