ISO 10759:1994

INTERNATIONAL
ISO
STANDARD
10759
First edition
1994-07-01
Graphit technology - Prepress digital
data exchange - Monochrome image data
on magnetic tape
Technologie graphique -
Echange de donnees digitales de
preimpression - Donnees d ’images monochrome sur bande magnetique
Reference number
ISO 107593 994(E)

---------------------- Page: 1 ----------------------
ISO 10759:1994(E)
Contents
Page
1
1 Scope .
1
2 Conformance .
1
Normative references .
3
1
.................................................................................
4 Definitions
2
.......................................................
5 Symbols and abbreviations
2
............................................................................
6 Requirements
2
61 . Basic requirement .
3
62 . DDESOO tapes .
3
63 . EU EF formats .
3
64 . Non-UEF .
3
.........................
. Specifying UEF, EUEF and non-UEF formats
65
3
. Padding of fields .
66
3
. Utilization of User Header Labels .
67
3
........................................................
68 . I ntermixing tape formats
3
.......................................................
7 Header Labels for DDESOO
..... 3
.~. “.~.D.~~. “~.~~.~.~.~.~ ”.~ ”~.~.~.~.~
71 . General tape format
6
7.2 Header Labels . . . . . . . . . . . . . . . . . . . . . . .~~.~.~ “~.~~~~.~.~. ““.~ “~.~. “.~~~.~.~.~.
.. “..... s . . . . . . . ~.~~. “Y~.O~..D.S=i..:~~~~ 14
Data structure and interpretation
7.3
16
. . . . . . .D.ln.~.~.~.~~~.~.~~.~.~~~.~~~.~~.
8 Trailer Labels for DDESOO
.,.,. Y.,Dmw.T.a ‘l6
8.1 End of File Labels and End of Volume Labels
16
. . . . . . . . “.~.~~.~.~.*.~~. ”.~.~~.~.~.
8.2 User Trailer Labels
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii

---------------------- Page: 2 ----------------------
0 ISO ISO 10759:1994(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for
which a technical committee has been established 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. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 10756 was prepared by the American National
Standards Institute (as ANSI IT8.5-1990) and was adopted, under a special
“fast-track procedure ”, by Technical Committee ISOFC 130, Graphit
technology, in parallel with its approval by the ISO member bodies.
. . .
Ill

---------------------- Page: 3 ----------------------
@iJ ISO
ISO 10759:1994(E)
Introduction
The technical content of this International Standard is identical to that of
American National Standard IT8.5-1990. The ANSI document was circu-
lated for ISO approval as a fast track document at the request of the 1989
plenary meeting of lSO/TC130 and subsequent to its approval was re-
structured to be in accordance with part 3 of the lSO/lEC Directives. IT8.5
itself resulted from the joint efforts of an international industry group that
included participants representing all of the major prepress vendors in the
world. That group, initially identified as the DDES (Digital Data Exchange
Specification) Committee, later became the founders of the ANSI IT8
(Image Technology) accredited Standards committee which is responsible
for electronie data exchange Standards in graphic arts prepress.
The data formats are modeled on Standards ISO 10755 and ISO 10756.
iv

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD 0 ISO ISO 10759:1994(E)
Graphit technology - Prepress digital data
exchange - Monochrome image data on magnetic
tape
1 Scope
This International Standard specifies a format for magnetic tape that will enable monochrome image data transfer
between colour and monochrome electronie prepress Systems manufactured by different vendors.
2 Conformance
A DDES implementation shall be in conformance with this International Standard if it meets the requirements of
clauses 6 to 8 excepting those requirements specifically identified as non-UEF and EUEF. Non-UEF and EUEF, if
used, shall be written as specified but are optionally read.
3 Normative references
The following Standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All Standards are subject to
revision, and Parties to agreements based on this International Standard are encouraged to investigate the possi-
bility of applying the most recent editions of the Standards indicated below. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 7-bit coded Character set for information interchange.
ISO/1 EC 646: 1991, Information technology -
ISO 1001: 1986, Information processing - File structure and labelling of magnetic tapes for information inter-
Change.
I SO/I EC 1864: 1992, Information technology - Unrecorded 12,7 mm (0‘5 in) wide magnetic tape for information
(3 200 ftpi) Phase encoded and 356 ftpmm (9 042 ftpi),
in terchange - 32 ftpmm (800 ftpi), NßZl, 126 ftpmm
NßZl.
I SO/l EC 3788: 1990, Information processing - 9-track, 12,7 mm (0,5 in) wide magnetic tape for information inter-
Change using Phase encoding at 126 ftpmm (3 200 ftpi), 63 cpmm (1 600 cpi).
l SO 5652: 1984, Information processing - g-Track, 12,7 mm (0.5 in) wide magnetic tape for information inter-
Change - Format and recording, using group coding at 246 cpmm (6 250 cpi).
4 Definitions
For the purposes of this International Standard, the following definitions apply.
4.1 Digital Data Exchange Specification (DDES) : A method of sharing digitally encoded information between
cooperating Systems.

---------------------- Page: 5 ----------------------
0 ISO
ISO 10759:1994(E)
4.2 User Exchange Format (UEF): The basic features that a System should implement to be in accordance with
this International Standard.
4.3 Extended User Exchange Format (EUEF): Optional features that a System may implement in addition to the
UEF features.
4.4 non-UEF: Vendor specific features not defined in this International Standard.
4.5 decimal Point notation: The expression of a decimal number in a numeric field as a string of numeric
characters (lSO/IEC 646 positions 3/0 to 3/9), with optional decimal Point (lSO/IEC 646 Position 2/14 - full stop).
5 Symbols and abbreviations
The following Symbols and abbreviations are used in this International Standard:
.
BP . Byte Position within a label. For ease of use with ISO 1001 I byte positions Start at 1.
L: Length of field in number of byte positions.
SPACE or b: The Character coded in Position 2/0 of ISO/IEC 646.
ZERO: The Character coded in Position 3/0 of ISO/IEC 646.
6 Requirements
6.1 Basic requirement
UEF version 03 is the basic requirement for exchange of monochrome images.
6.1 .l Monochrome pictures
The monochrome picture data to be interchanged under UEF version 03 shall consist of a rectangular array of
picture elements ( “Pixels ”) with varying grades of intensity of a Single colour, encoded as specified in 7.3.1. The
intended effect is to reproduce the monochrome picture using various levels of the specified image colour.
6.1.2 Binary pictures
The binaty picture data to be interchanged under UEF version 03 shall consist of a rectangular array of picture el-
ements ( “pixels ”). Esch Pixel shall be either a solid or transparent image or background colour as specified in
7.3.2.
NOTE 1 Th or requir ‘ement regarding the origin or the nature of the binary picture. Typical ex-
ere is no further ass umption
amples includ phs, sca nned line art Originals or some forms of rasterized text or geometric data.
e scre ened photogra
6.1.3 Binary line art
The binary line art data to be interchanged under UEF version 03 shall consist of a rectangular array of picture el-
ements ( “Pixels ”) each of which shall be either a solid or transparent image or background colour encoded as
specified in 7.3.3.
NOTE 2 The binary line art image is further characterized by having continuous areas sf many Pixels of either image and
background colour, and not simulating a greater range of tonal values by “dithering” or “error diffusion” techniques. The spatial
Information is therefore amenable to run length encoding techniques, which may reduce file size and allow for faster pro-
cessing.
2

---------------------- Page: 6 ----------------------
0 ISO
ISO 10759:1994(E)
6.2 DDESOO tapes
When the tape is identified as DDES (BP 44-47) version 00 (BP 50-51) in the Volume 1 Header, then the tape shall
be written as specified in this International Standard. No other values are permitted in UEF or EUEF fields. The
only fields available for non-prescribed use are the fields with contents “resen/ed for System use (vendor use)”
and vendor UHLs (BP 04-80). All other fields shall be written as described in this International Standard or as in
ISO 1001.
Where fields are not defined in this International Standard, ISO 1001 shall be used.
DDES tapes shall be written at 1 600 bpi Phase encoded or 6 250 bpi GCR, in accordance with lSO/IEC 3788 or
ISO 5652 respectively, on media as specified in ISO/IEC 1864.
6.3 EUEF formats
Use of the extended implementation EUEF fields and values is optional. However, only those code s spe cif ied
this International Standard shall be used.
6.4 Non-UEF
Non-UEF fields and values shall also be specified within DDES. These fields and values shall be restricted in use
in the same manner as EUEF fields and values.
6.5 Specifying UEF, EUEF and non-UEF formats
BP 05-10 of UHLl shall be used as the UEF indicator. This field shall be coded as indicated in 7.2.4.
6.6 Padding of fields
Any numeric fields shall be right-aligned and ZERO padded, and any alphanumeric fields shall be left-aligned and
padded with SPACEs.
6.7 Utilization of User Header Labels
UHLl, UHL2, UHL3, UHL4 and UHL5 are currently specified in this International Standard. Up to 24 additional
UHLs are reserved for use in UHL2: up to six additional for future DDES use (BP 31), up to nine for other future
use (BP 32), and up to nine for vendor use (BP 33). DDES UHL values (BP 04) shall be unique and in Order. The
values “1 ” to “9 ”, ‘IA” and “B” shall be reserved for DDES use.
68 . Intermixing tape formats
Different UEF magnetic tape file formats may be found on the same DDES tape and/or volume set. A DDES
magnetic tape may also contain EUEF as well as non-UEF file formats.
7 Header Labels for DDESOO
The following subclauses describe the DDES use of ISO 1001 tape format.
7.1 General tape format
Table 1 gives the format for two monochrome image files on one tape. Table2 gives the format for two
monochrome image files on two tapes. This International Standard supports multiple tapes in a file set as de-
scribed in HDRl, including the splitting of an image file over multiple tapes.
3

---------------------- Page: 7 ----------------------
ISO 10759:1994(E)
Table 1 - Format for two monochrome image files on one tape
File Header Label 2 of the following file
User Header Label 1 of the following file
User Header Label 2 of the following file
User Header Label 3 of the following file
User Header Label 4 of the following file
User Header Label 5 of the following file
Additional UHLs may be specified in UHLZ (BP 31-33)
Logical tape mark
IMAGE FILE 1
End of File Label 1
End of File Label 2
User Trailer Label 1
User Trailer Label 2
User Trailer Label 3
User Trailer Label 4
User Trailer Label 5
A UTL for each UHL is to be included on the tape. These are not required
to be read. UTLs follow EOVZ and EOF2. These are copied from the pre-
User Header Label 3 of the following file
User Header Label 4 of the following file
User Header Label 5 of the following file
Logical tape mark
IMAGE FILE 2
End of File Label 1
End of File Label 2
User Trailer Label 1
User Trailer Label 2
User Trailer Label 3
User Trailer Label 4
User Trailer Label 5
en
Logical tape mark (logical

---------------------- Page: 8 ----------------------
ISO 10759:1994(E)
- Format for two monochrome image files on two tapes
Table 2
First tape
Physical tape mark (beginning of tape)
BOT
Volume Header Label
VOL1
HDRl File Header Label 1 of the following file
HDRZ File Header Label 2 of the following file
UHLl User Header Label 1 of the following file
UHLZ User Header Label 2 of the following file
UHL3 User Header Label 3 of the following file
UHL4 User Header Label 4 of the following file
UHL5 User Header Label 5 of the following file
*
*
*
TM Logical tape mark
****
IMAGE FILE 1
image data
Logical tape mark
TM
End of File Label 1
EOFl
End of File Label 2
EOF2
UTLl User Trailer Label 1
UTL2 User Trailer Label 2
UTL3 User Trailer Label 3
UTL4 User Trailer Label 4
UTL5 User Trailer Label 5
*
*
TM Logical tape mark
HDRl File Header Label 1 of the following file section
File Header Label 2 of the following file section
HDR2
UHLl User Header Label 1 of the following file section
UHL2 User Header Label 2 of the following file section
UHL3 User Header Label 3 of the following file section
UHL4 User Header Label 4 of the following file section
UHL5 User Header Label 5 of the following file section
+
*
TM Logical tape mark
****
IMAGE FILE 2 Section 1
image data
Physical tape mark (end of tape)
EOT
TM Logical tape mark
EOVl End of Volume Label 1
EOV2 End of Volume Label 2
UTLl User Trailer Label 1
UTL2 User Trailer Label 2
UTL3 User Trailer Label 3
UTL4 User Trailer Label 4
UTL5 User Trailer Label 5
*
TM Logical tape mark
TM
Logical tape mark (logical end of tape)

---------------------- Page: 9 ----------------------
ISO 10759:1994(E)
User Header Label 2 of the preceding file section
User Header Label 3 of the preceding file section
User Header Label 4 of the preceding file section
User Header Label 5 of the preceding file section
Logical tape mark
IMAGE FILE 2 Section 2
End of File Label 1
End of File Label 2
User Trailer Label 1
User Trailer Label 2
User Trailer Label 3
User Trailer Label 4
User Trailer Label 5
7.2 Header Labels
The following subclauses specify the Header Labels for DDESOO UEF03 tapes. There shall be no optional formats
or fields in DDESOO except as specified.
7.2.1 Volume 1 Header (VOLl)
Table3 gives byte Position, field name, length in bytes and content for the Volume 1 Header.
The sequence number of tapes in a volume set shall Start with “01” and be incremented by 1 for each tape in the
set as specified in BP 48-49.

---------------------- Page: 10 ----------------------
ISO 10759:1994(E)
Table 3, - Volume 1 Header
(VOLl)
BP
Field name L Content
01-04 label identifier and number 4 “VOL1 ”
05-10
volume identif ier 6
11
volume accessibility 1 SPACE
12-37 reserved for ISO 1001 use
26 SPACEs
38-43 creation date (ISO 1001 format)
6
44-47 DDES identifier 4 ” DDES”
sequence number of tape in volume set 2
48-49
50-51 DDES Version 2 "00"
52-79 reserved for ISO 1001 use 28 SPACEs
80 label Standard Version 1
7.2.2 File Header Label 1 (HDRl)
Table 4 gives byte Position, field name, length in bytes and content for the File Header Label 1.
The contents of file identifier (BP 05-21), generation number (BP 36-39) and generation Version number (BP 40-41)
tan be different between different operating Systems. These fields are not intended for use in
intervendor systems
communication.
The file set identifier (BP 22-27) does not contain a job name for DDES. The job name shall
be contained in the
User Header Label 1 (see table6).
When the date is not defined, SPACE followed by five ZEROS or alternatively six ZEROS shall be used (see
BP 48-53 in table4).
Table 4 - File Header Label 1 (HDRl)
BP Field name L Content
01-04 label identifier and number
4 “ HDRl ”
05-21 file identifier
17
22-27 file set identifier
6
28-31 file section number
4
32-35 file sequence number 4
36-39 generation number
4
40-41
generation Version number 2
42-47 file creation date 6
48-53
file expiration date (optional) 6
54
file accessibility 1 SPACE
55-60 block count
6 ZEROS
61-73
reserved for System use (vendor use) 13
74-80 reserved for ISO 1001 use
7 SPACEs
7.2.3 File Header Label 2 (HDR2)
Table 5 gives byte Position, field name, length in bytes and content for the File Header Label 2.
7

---------------------- Page: 11 ----------------------
0 ISO
ISO 10759:1994(E)
BP 16-50 (System use/vendor use) shall be for individual use of the vendors and not for intervendor Systems
communication.
Table 5 - File Header Label 2 (HDR2)
Field name L Content
BP
I I
4 “HDRZ”
01-04 label identifier and number
1 ” F”
05 record format = fix
...