ISO IEC 1001-2012 Information technology - File structure and labelling of magnetic tapes for information interchange《信息技术 信息交换用磁带的文件结构和标记》.pdf

1、 Reference number ISO/IEC 1001:2012(E) ISO/IEC 2012INTERNATIONAL STANDARD ISO/IEC 1001 First edition 2012-08-01Information technology File structure and labelling of magnetic tapes for information interchange Technologies de linformation Structure des fichiers et tiquetage des bandes magntiques pour

2、 lchange dinformation ISO/IEC 1001:2012(E) COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permiss

3、ion in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2012 All rights res

4、ervedISO/IEC 1001:2012(E) ISO/IEC 2012 All rights reserved iiiContents Page Foreword . v 1 Scope 1 2 Conformance . 1 2.1 Conformance of a magnetic tape volume set . 1 2.2 Conformance of an information processing system . 1 3 Normative references 2 4 Terms and definitions . 2 5 Notation 4 6 Arrangeme

5、nt of labels and files . 4 6.1 Arrangement of data on a volume . 4 6.2 Arrangement of label groups . 4 6.2.1 Labels . 4 6.2.2 Label sets . 5 6.2.3 Label groups 5 6.3 Arrangement of file sections 5 6.3.1 File section . 5 6.3.2 Labelled-Sequence 5 6.4 Relationship of file sections to a volume 6 6.5 Ar

6、rangement of files and file sets 6 6.5.1 Files. 6 6.5.2 File sets 6 6.6 Structure of a volume set . 7 7 File structure for data interchange 7 7.1 File structure for data interchange for a-characters 7 7.1.1 Blocks . 7 7.1.2 Records 8 7.1.3 Files. 9 7.2 File structure for data interchange for e-chara

7、cters 10 7.2.1 Blocks . 10 7.2.2 Records 10 7.2.3 Files. 11 8 Format and contents of the labels and label sets 11 8.1 Format and contents of the labels and label sets for a-characters . 11 8.1.1 Character set and coding . 11 8.1.2 Justification of characters 12 8.1.3 Volume Header Label Set (VOL1 to

8、 VOL9) . 12 8.1.4 Installation Volume Label Set (UVL1 to UVL9) . 14 8.1.5 File Header Label Set (HDR1 to HDR9) 15 8.1.6 User File Header Label Set (UHL) 20 8.1.7 End of Volume Label Set (EOV1 to EOV9) 20 8.1.8 End of File Label Set (EOF1 to EOF9) . 23 8.1.9 User File Trailer Label Set (UTL) 25 8.2 F

9、ormat and contents of the labels and label sets for e-characters . 26 8.2.1 Character set and coding . 26 8.2.2 Justification of characters 26 8.2.3 Volume Header Label Set (VOL1) 26 8.2.4 File Header Label Set (HDR1 to HDR2) 28 8.2.5 User File Header Label Set (UHL1 to UHL8) . 31 ISO/IEC 1001:2012(

10、E) iv ISO/IEC 2012 All rights reserved8.2.6 End of Volume Label Set (EOV1 to EOV2) 32 8.2.7 End of File Label Set (EOF1 to EOF2) 33 8.2.8 User File Trailer Label Set (UTL1 to UTL8) 35 9 Levels of interchange (only a-characters) 36 9.1 Level 1 .36 9.2 Level 2 .36 9.3 Level 3 .36 9.4 Level 4 .36 10 Re

11、quirements for the description of systems 36 11 Requirements for an originating system .37 11.1 Requirements for an originating system for a-characters 37 11.1.1 General 37 11.1.2 Files .37 11.1.3 Labels 37 11.1.4 Restrictions 39 11.2 Requirements for an originating system for e-characters 39 11.2.1

12、 General 39 11.2.2 Files .39 11.2.3 Labels 39 12 Requirements for a receiving system 40 12.1 Requirements for a receiving system for a-characters .40 12.1.1 General 40 12.1.2 Files .41 12.1.3 Labels 41 12.1.4 Restrictions 42 12.2 Requirements for a receiving system for e-characters .42 12.2.1 Genera

13、l 42 12.2.2 Files .43 12.2.3 Labels 43 Annex A (informative) Code tables for a-characters .45 A.1 a-characters 45 Annex B (normative) Code Tables for e-characters 46 B.1 e-characters 46 Annex C (informative) Initialized volumes 47 C.1 Purpose .47 C.2 Specification .47 ISO/IEC 1001:2012(E) ISO/IEC 20

14、12 All rights reserved vForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International

15、Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO

16、 and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical commit

17、tee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the

18、 possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 1001 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 23, Digi

19、tally Recorded Media for Information Interchange and Storage. This first edition of ISO/IEC 1001 cancels and replaces the second edition of ISO 1001:1986, which has been technically revised. INTERNATIONAL STANDARD ISO/IEC 1001:2012(E) ISO/IEC 2012 All rights reserved 1Information technology File str

20、ucture and labelling of magnetic tapes for information interchange 1 Scope This International Standard specifies the file structure and the labelling of magnetic tapes for the interchange of information between users of information processing systems. This International Standard also specifies volum

21、e and file structure; basic characteristics of the blocks containing the records constituting the file; recorded labels for identifying files, file sections and volumes of magnetic tapes; four nested levels of interchange. Furthermore, this International Standard specifies requirements for the proce

22、sses which are provided within information processing systems, to enable information to be interchanged between different systems, utilizing recorded magnetic tape as the medium of interchange. For this purpose it specifies the functions to be provided within systems which are intended to originate

23、or receive magnetic tape volumes which conform to this International Standard. 2 Conformance 2.1 Conformance of a magnetic tape volume set A magnetic tape volume set conforms to this International Standard when all information recorded on it conforms to the specifications of this International Stand

24、ard. A Statement of conformance shall identify the lowest level of interchange to which the contents of the magnetic tapes conform. A prerequisite to such conformance is conformance of each volume of the volume set to the same International Standard for information interchange on magnetic tapes. 2.2

25、 Conformance of an information processing system An information processing system conforms to this International Standard if it meets all the requirements specified in this International Standard either for an originating system, or for a receiving system, or for both types of system. A statement of

26、 conformance shall identify which of these sets of requirements can be met by the system. ISO/IEC 1001:2012(E) 2 ISO/IEC 2012 All rights reserved3 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition ci

27、ted applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 646, Information technology ISO 7-bit coded character set for information interchange 4 Terms and definitions For the purposes of this document, the following terms and defi

28、nitions apply. 4.1 application program program that processes the contents of records belonging to a file, and may also process selected attribute data relating to the file or to the volume(s) on which it is recorded NOTE An application program is a specific class of user as defined in this Internat

29、ional Standard. 4.2 block group of bytes recorded on a magnetic tape as a unit 4.3 blocked attribute of records that indicates that they may begin at a byte that is not the first byte of a block 4.4 byte string of eight binary digits operated upon as a unit 4.5 file named collection of information c

30、onsisting of zero or more records 4.6 file section part of a file that is recorded on any one volume 4.7 file set collection of one or more files recorded consecutively on a set of volumes 4.8 fixed-length record record contained in a file in which all records must have the same length 4.9 implement

31、ation set of processes within an information processing system which enable that system to behave as an originating system, or as a receiving system, or as both types of system 4.10 Initialized volumes magnetic tape already recorded in the first label group on the volume although no valid file secti

32、ons are recorded (See Annex C) ISO/IEC 1001:2012(E) ISO/IEC 2012 All rights reserved 34.11 installation person or other entity which controls the use of one or more implementations which process and interchange magnetic tapes NOTE An installation is a specific class of user as defined in this Intern

33、ational Standard. 4.12 label record that identifies and characterizes a volume, or a file section on a volume 4.13 originating system information processing system which can record a file set on a volume set for the purpose of data interchange with another system 4.14 originator person who is respon

34、sible for issuing commands to an originating system 4.15 receiving system information processing system which can read a file set from a volume set which has been recorded by another system for the purpose of data interchange 4.16 recipient person who is responsible for issuing commands to a receivi

35、ng system 4.17 record related data treated as a unit of information 4.18 segmented record (only a-characters) record contained in a file which is assigned to contain records that may have different lengths and that may be recorded entirely in one block or over more than one block 4.19 International

36、Standard for information interchange (only a-characters) standard that specifies the recording method and the track format of a magnetic tape (for example ISO 1863) 4.20 Tape Mark control block used as a delimiter 4.21 user person or other entity that causes the invocation of the services provided b

37、y an implementation 4.22 variable-length record record contained in a file in which the records may have different lengths 4.23 volume dismountable reel of magnetic tape ISO/IEC 1001:2012(E) 4 ISO/IEC 2012 All rights reserved4.24 volume set collection of one or more volumes, on which a file set is r

38、ecorded 5 Notation The following notation is used in this International Standard: BP: Byte position within the label L: Length of the field in number of byte positions a-character(s): Any of the allowed characters (see 8.1.1) e-character(s): Any of the allowed characters (see 8.2.1) Digit(s): Any di

39、git from ZERO to NINE. With the exception of SPACE, a group of capital letters in the content column of a table specifying label contents indicates that these characters shall appear in the order given and in the corresponding byte positions of the field specified, for example VOL in BP 1 to 3 of th

40、e Volume Header Labels. In the tables and thoughout this International Standard, SPACE signifies the character coded in position 2/0 of ISO 646 or 4/0 of e-character(s). 6 Arrangement of labels and files 6.1 Arrangement of data on a volume A volume shall be recorded with a sequence of blocks and Tap

41、e Marks. The sequence shall commence with a block, and shall terminate within the usable recording area. 6.2 Arrangement of label groups 6.2.1 Labels A label shall be a record that shall have a length of 80 bytes. Each label shall be recorded within the first or only 80 byte positions of a block. If

42、 the block contains any additional bytes, they shall be recorded with any desired bit combinations. Each label shall be of one of the following types: Volume Header Installation Volume (only a-characters) File Header User File Header End of File End of Volume User File Trailer ISO/IEC 1001:2012(E) I

43、SO/IEC 2012 All rights reserved 56.2.2 Label sets A sequence of one or more labels of the same type, recorded in consecutive blocks, shall be a label set of that type. All labels in a set shall be numbered consecutively starting from 1, except those labels in the User File Header and User File Trail

44、er Label Sets. 6.2.3 Label groups A label group shall consist of a mandatory label set, optionally followed by a second label set of a different type. Each label group shall be of one of the types listed in Table 1, and shall include only those label sets listed in the corresponding entry of the tab

45、le. The first set listed in each table entry is the mandatory set, and the second set listed is the optional set. Table 1 Label groups Label group Label sets Beginning of Volume Volume Header Installation Volume (only a-characters) Beginning of File Section File Header User File Header End of File S

46、ection End of Volume User File Trailer End of File End of File User File Trailer 6.3 Arrangement of file sections 6.3.1 File section A file section shall be recorded in a sequence of one or more blocks, or no blocks. If no blocks are recorded, the file section is regarded as empty. 6.3.2 Labelled-Se

47、quence 6.3.2.1 A Labelled-Sequence shall consist of the sequence of blocks and Tape Marks as listed below, recorded consecutively: a) Beginning of File Section Label Group; b) Tape Mark; c) a file section; d) Tape Mark; e) either an End of File Label Group or an End of File Section Label Group, as r

48、equired in 6.3.2.2; f) Tape Mark. ISO/IEC 1001:2012(E) 6 ISO/IEC 2012 All rights reserved6.3.2.2 If the file section is the last or only file section of a file, then the label group that follows it shall be an End of File Label Group. Otherwise the label group shall be an End of File Section Label G

49、roup. NOTE An End of File Section Label Group can only be the last label group on a volume because of the requirements of 6.5.1. 6.3.2.3 Within a Labelled-Sequence the information contained in the File Header Label Set, and in the End of File or End of Volume Label Set, shall apply to the file section that is recorded within the sequence. 6.3.2.4 Within a Labelled-Sequence the number of labels in an End of Volume or End of File Label Set shall be equal to the number of labels in the File Header Label Set. Within all Labelled