Compatibility of formats complements compatibility of cataloguing rules, with formats covering structural issues and cataloguing rules governing record content. The 1961 Paris Principles made recommendations on the choice, form and structure of headings for names and for titles, and in 1969 an IFLA International Meeting of Cataloguing Experts (Chaplin, Anderson & HonoreĢ, 1970) held in Copenhagen produced a resolution that proposed creation of standards to normalize the form and content of bibliographic descriptions.