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This reference manual presents a standardized communication format for the exchange between databases or other information services of machine-readable information on research in progress. The manual is produced in loose-leaf format to facilitate updating. Its first section defines in broad outline the format and content of applicable records. A matrix shows all mandatory and optional data elements and sub-elements. Names and detailed definitions of each mandatory and optional data element are given in the second part as well as guidance on how the data element content is to be selected and entered onto the machine-readable medium. The third section provides detailed specifications of the carrier format or record structure, character sets and coding, transliteration, physical standards for magnetic tapes, and other aspects which are primarily of concern to computer system designers. The fourth part presents general guidelines for providing documentation on individual implementations of the reference manual. Topics covered include computer-related aspects; subject coverage; indexing, abstracting and editorial policies and practices; selected choices from among alternatives allowed by the reference manual specifications; and extensions for user-defined data fields. Additional information which is needed for the form and presentation of individual data elements and for transliteration is given in appendices. A 26-item bibliography, including relevant international standards, is also provided. (Author/ESR)