4341 Ttso NTERNATIONAL STANDARD INTE RNATIONAL ORGANIZATiON FOR STANDARDIZATION MEXAYHAPOAHAR OPrAHM3AWA nO CTAHAAPTW3AUMWORGANISATION INTE RNATIONALE DE NORMALISATION Information processing -- Magnetic tape cassette and cartridge labelling and file structure for information interchange Traitement de I'information -- Etiquetage des bandes magnetiques en cassettes et cartouches, et structure des fichiers pour/'echange d'information First edition - 1978-12-01 ISO 4341-1978 (E) UDC 681.327.64 Ref. No. ISO 4341-1978 (E) Descriptors : data processing, information interchange, cas magnetic tapes, files, specifications, labelling Price based on 11 pages Not for Resale FOREWORD ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO member bodies). The work of developing International Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. International Standard ISO 4341 was developed by Technicat Committee SO/TC97, Computers and information processing, and was circulated to the member bodies in April 1976. It has been approved by the member bodies of the following countries : Australia Italy Sweden Belgium ueder Switzerland Brazil Turkey Mexico Czechoslovakia Netherlands United Kingdom Germany, F. R. Philippines U.S.A. Hungary Romania Ireland South Africa, Rep. of No member body expressed disapproval of the document. @ International Organization for Standardization, 1978 Printed in Switzerland Copyright International Organization for Standardization ed without license from IHS Not for Resale CONTENTS Page O Introduction 1 Scope and field of application 2 References. 3 Definitions. 2 4 Basic system. 3 3 4.1 Introduction . 4.2 Use of tape marks. 3 4.3 Structuring of files . 3 4.4 Coincidence of end of file and intermediate start of track. 4.5 Coincidence of end of file and intermediate end of track 3 4.6 End of available space 4 4.7 Recording density. 4 4.8By-pass and check-point records 4 5 Compact system 5 5.1 Introduction . 5 5.2 Use of tape marks. . 5 5.3 Formats and contents of labels . 5 5.4 Processing of label fields 5.5 Structuring the files 6 5.6 Recording density. 8 5.7 By-pass and check-point records 8 6 Extended system. 9 6.1 Introduction , 9 9 6.2 Use of tape marks. 9 6.3 Formats and contents of labels 6.4 Processing of label fields .10 6.5 Structuring the files 6.6 Use of optional labels 6.7 Recording density. 6.8 By-pass and check-point records ili Copyright International Organization for Standardization nsefrom IHS Not for Resale