1 Scope and Field of Application
2 Conformance
  2.1 Conformance of a Magnetic Tape Volume Set
  2.2 Conformance of an Information Processing System
3 References
4 Definitions
  4.1 Application Program
  4.2 Block
  4.3 Blocked
  4.4 Byte
  4.5 File
  4.6 File Section
  4.7 File Set
  4.8 Fixed-Length Record
  4.9 Implementation
  4.10 Installation
  4.11 Label
  4.12 Originating System
  4.13 Originator
  4.14 Receiving System
  4.15 Recipient
  4.16 Record
  4.17 Segmented Record
  4.18 Standard for Information Interchange
  4.19 Tape Mark
  4.20 User
  4.21 Variable-Length Record
  4.22 Volume
  4.23 Volume Set
5 Notation
Section II
6 Arrangement of Labels and Files
  6.1 Arrangement of Data on a Volume
  6.2 Arrangement of Label Groups
      6.2.1 Labels
      6.2.2 Label Sets
      6.2.3 Label Groups
  6.3 Arrangement of File Sections
      6.3.1 File Section
      6.3.2 Labelled-Sequence
  6.4 Relationship of File Sections to a Volume
  6.5 Arrangement of Files and File Sets
      6.5.1 Files
      6.5.2 File Sets
  6.6 Structure of a Volume Set
7 File Structure for Data Interchange
  7.1 Blocks
      7.1.1 Characteristics
      7.1.2 Block length
      7.1.3 Offset field
      7.1.4 Padding field
  7.2 Records
      7.2.1 Characteristics
      7.2.2 Fixed-length records
      7.2.3 Variable-length records
      7.2.4 Segmented records
      7.2.5 Coded representation of data
  7.3 Files
      7.3.1 Characteristics
      7.3.2 Consistency of file attributes between file
            sections
      7.3.3 File Organization
8 Format and Contents of the Labels and Label Sets
  8.1 Character Set and Coding
  8.2 Justification of Characters
  8.3 Volume Header Label Set (VOL1 to VOL9)
      8.3.1 First Volume Header Label (VOL1)
      8.3.2 Other Volume Header Labels (VOL2 to VOL9)
  8.4 Installation Volume Label Set (UVL1 to UVL9)
      8.4.1 Label Identifier (BP 1-3)
      8.4.2 Label Number (BP 4)
      8.4.3 Field Reserved for Installation Use (BP 5-80)
  8.5 File Header Label Set (HDR1 to HDR9)
      8.5.1 First File Header Label (HDR1)
      8.5.2 Second File Header Label (HDR2)
      8.5.3 Other File Header Labels (HDR3 to HDR9)
  8.6 User File Header Label Set (UHLs)
      8.6.1 Label Identifier (BP 1-3)
      8.6.2 Label Number (BP 4)
      8.6.3 Field reserved for application use (BP 5-80)
  8.7 End of Volume Label Set (EOV1 to EOV9)
      8.7.1 First End of Volume Label (EOV1)
      8.7.2 Second End of Volume Label (EOV2)
      8.7.3 Other End of Volume Labels (EOV3 to EOV9)
  8.8 End of File Label Set (EOF1 to EOF9)
      8.8.1 First End of File Label (EOF1)
      8.8.2 Second End of File Label (EOF2)
      8.8.3 Other End of File Labels (EOF3 to EOF9)
  8.9 User File Trailer Label Set (UTL)
      8.9.1 Label identifier (BP 1-3)
      8.9.2 Label Number (BP 4)
      8.9.3 Field reserved for application use (BP 5-80)
9 Levels of Interchange
  9.1 Level 1
  9.2 Level 2
  9.3 Level 3
  9.4 Level 4
Section III
10 Requirements for the Description of Systems
11 Requirements for an Originating System
   11.1 General
   11.2 Files
   11.3 Labels
   11.4 Restrictions
12 Requirements for a Receiving System
   12.1 General
   12.2 Files
   12.3 Labels
   12.4 Restrictions
Appendix A - IRV Code Table from ECMA-6
Appendix B - Initialized Volumes
Appendix C - Main Differences between the 3rd and the 4th
             Editions