Cooperation in Documentation and Communication (CODOC), a computerized system designed to provide a quick and economical method of in-depth access to individual publications within a government documents collection, currently operates as an information network in Ontario and Quebec and independently in several other libraries in Canada and the United States. CODOC utilizes codes derived from the Guelph document system as shelf locaters, with access through corporate and/or personal author, title, series and serial title, and key words. This system, which gathers each participating library's master files twice each year and merges them to create a union shelf list, also creates separate indexes to corporate authors and series, along with monthly cumulated supplements. The new objectives of access, consistency with some tolerance of local variation, and accuracy are more generalized than the initial objectives, which addressed more specific issues and were unattainable because of the conflict between in-house commitments and CODOC requirements. (Author/MBR)