NOTE (Sanitized)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP74-00390R000300440012-4
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 53
• Document Creation Date: December 9, 2016
• Document Release Date: August 2, 2001
• Sequence Number: 12
• Publication Date: August 4, 1970
• Content Type: NOTES

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STATINTL ) August 1970
Since the attached handbook on Proposed Standards for Labelling
Magnetic Tapes was drafted over a year ago I called Gerry Rosenkrantz
at National Archives for up to date information. I thought the draft
might have been coordinated, edited, and published but such was not the
case.
EARS received responses from all agencies. Half thought the standard
was fine the other half felt the big IBM 360 was not compatible with the
older computers many agencies had.
Task Force Croup 7 was set up to solve the government agency standard
for labels. The task force expired and an interim ad hoc group was set up.
Bureau of Standards says Archives eannot call this a standard. Only Bur of
Standards can issue a standard. Archives can call it a procedure if they
want and Mr. Rosenkrantz said they may very well publish this paper as a
procedure. Gerry said that the situation is no better in the commercial
shops that he has visited. Someone in Bureau of Standards was too vociferous
about the incompatibility of IBM computer with others in the government.
Manufacturers want a slight difference in their product. The total picture
appears to be unsettled and considered to be a politically sensitive subject.
I didn't quite understand all the ramifications involved.
The Records Centers are storing over 2 million tapes. Some of these
will be transferred to the Archives and Archives wants to be able to read__
and write the tapes. Some standard labelling procedure is needed. NABS,
at this point, will accept tapes providing they are documented enough
according to their internal procedures so that they are able to get the
program to read the tapes.
In view of the indecision about the proposed draft we can:
1. Wait for the!lhassle between Archives and Bureau of Standards to
be settled.
2. Adopt whatever procedure the Archives publishes as an interim
measure.
3. Write a procedure for storing tapes in our Records Center as
we should have some documentation of our tapes.
g ther than to adopt a "wait and see" attitude I think we should write
up our own procedure to take care of our in-house problems.
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11 December 1969
SUBJECT Proposed Standards for Labelling Magnetic Tapes
1. The attached proposed handbook was written by National
Archives outlining procedures for the transfer and storage of
magnetic tapes in the Federal Records Centers. When adopted, the
instructions will apply to all Federal agencies.
2. This Agency does not store its tapes in the Federal Records
Center. However, I envision a similar problem with tapes at our
Records Center and recommend the adoption of these procedures for
our Agency. Since you are the DDS Information Processing Coordinator
I propose that the attached handbook be referred to the Information STATINTL
Processing Board for review and comments.
Chief, Records Administration Branch
Attachments:
Proposed Transmittal to IPC
6 NARS Handbooks of 30 June 1969
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MEMORANDUM TO: Chairman, Information Processing Board
. Standards for Storing and Retrieving Magnetic Tapes
1. Copies of the attached handbook are submitted to you for
nsideration by the Board members.
u,i Lt c~..va. u~a vcuuGt . nJ111UU U11J_o t1cCiJ.L y S11uj-.Liuu_Li1.S' j_w3 own .aecorus
P` e en ec we will encounter similar difficulties with storage of magnetic
tapes. ~ 4s-_quite-gossible._that in the distant future the Agency
-might-&tore -its-'tapes in Federal Records Centers and be subject to
these--r-ules . --
!Federal agencies wishing to transfer magnetic tapes for storage in the
2. The handbook is currently being coordinated by the National
rchives. When it is published the procedures will apply to all
3. With the trend towards greater use of magnetic tape many
tapes will contain data of archival value and steps should be taken
to preserve this information. According to National Archives magnetic
tape is not an archival medium. Its shelf life is no more than twelve
years. Consequently, periodic recopying and conversion to new tapes
may be required.
4+. In order to identify data as archival and to provide for
record retrieval additional content descriptions and classification
information are needed. This handbook provides the Federal standards
and. procedures for storing magnetic tapes so that they may be identi-
fied, and processed, at a future date. The varying degrees of storage
and service capabilities for a Records Center are also outlined. in the
handbook. Currently, our Records Center is performing "A" service
which in terms of this handbook, means that it provides shelf storage
space only. No conditioning or guarantee of data safety is made.
Retrieval is by box number not content.
`to adopt this handbook of instructions or prepare a similar one to out-
5. It is recommended that this handbook be reviewed by the Infor-
mation Processing Board. to determine and establish the rules and require-
ments for whatever degree of Agency magnetic tape storage and. service
is desired in our Records Center. In addition, we must decide whether
STATI NTL
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Next 1 Page(s) In Document Exempt
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STANDARDS FOR LABEL INFORMATION CONTENT TO ACCOMPANY MAGNETIC
TAPE REELS WHEN ACCESSIONED BY THE NATIONAL ARCHIVES
101
~C fi! ~j;~pfi
June 30, 1969
Written by G. J. Rosenkuantz
National Archives & Records Service
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PROPOSiy
STANDARDS FOR LABEL INFORMATION CONTENT TO ACCOMPANY MAGNETIC TAPE REELS
WHEN ACCESSIONED BY THE NATIONAL ARCHIVES
1. Background - With the passage of time it has become more and more evident
that some of the records and information stored on magnetic tapes has
archival value equal to that of more conventional paper records. The
archival records on machine-readable media, as a percentage of the
total volume of such records, may be small but the number of reels
containing this type of data makes up a significant number. By statute,
the National Archives is the final repository for archival records
regardless of the media on which the records are carried, whether the
media be paper, film, machine-sensible substance, or other material.
In time, the National Archives expects to be offered magnetic tapes
to be made a part of the Archives of the United States. In order to
utilize the records on the magnetic tapes there must be a means of
having access to them. As a means to reaching that objective this
standard for label information content to accompany magnetic tape
reels is promulgated.
According to the best available technical information, magnetic tape,
unlike paper or microfilm, is not an archival recording medium.
Therefore, the readability of a reel of magnetic tape cannot be
guaranteed beyond the guaranteed shelf life of a tape stored in
conditioned tape storage space at a Federal Records Center. Twelve
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years is the best current estimate of magnetic tape shelf life.
This may be extended as experience accumulates.
In order to insure a shelf life beyond one year, magnetic tapes must
be cleaned, checked, and conditioned to avoid destruction of the
recorded data. Experience also dictates that periodic handling is
required to insure the continued safety of the data for the storage
period. This currently requires rotation and retensioning. Because
of the limited life of data recorded on magnetic tape, periodic
recopying is required for retention in excess of shelf life. In
order to perform this operation, sufficient information must accompany
the tape reel to allow mechanical verification of the copying process.
Data which is identified either as archival or for which individual
record retrieval is required needs additional content description
and classification information to accompany it. The information
required to accompany magnetic tape reels for each grade of service
is specified in this standard.
2. Purpose - To provide standards and procedures by which magnetic computer
tapes containing records and data whose retention is to be guaranteed
for a specified time can be.stored, identified, retrieved and processed
by computers at some future date.
This purpose is achieved when an agency submitting tape files for
permanent or long term storage to NARS supplies sufficient information
on and with magnetic tapes to enable NARS to meet this objective. This
standard describes the forms, procedures, label formats and label
contents required to implement this capability for various grades of
service.
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3. Applicability
These instructions apply to all Federal agencies which record or
originate magnetic tape data records as defined in Title )4i USC,
Chapter 10, Section 366 and regulations issued under that act and
which offer such records for accessioning by the National Archives
and Records Services, particularly those included as part of the
National Archives of the United States.
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4. Definition of Terms
A complete glossary of terms defining technical aspects of this standard
is enclosed as Appendix A . '. Certain key terms are duplicated here
because of their frequent and special usage within the context of this
File - A file is a major collection of information, consisting of all
the logical records pertaining to a general subject. Conceptually,
this term relates to such collections as a Payroll File, a Requisition
File, etc.
File Set - A file set is a collection of one or more related files
recorded on one or more reels of magnetic tape. A file set may consist
of:
- One file recorded on a single reel of tape
- More than one file recorded on a single reel of tape.
For purposes of this standard, the files may differ only in coverage
of information. In all other aspects, such as logical record formats,
character codes and logical field or item descriptions, they must
be identical.
- One file recorded on more than one volume.
- More than one file recorded on more than one volume.
For purposes of this standard, the files may differ only in coverage
of information; e.g. geography or time period. In all other aspects,
such as logical record formats, character. codes, sorting sequence
and logical field or item descriptions, then must be identical.
Logical Record - A logical record is a collection of related items of
data, which for operating system logic purposes is treated as a unit
of information. Conceptually a logical record corresponds to a
transaction, an individual account, etc. The structure of the record
may otherwise be arbitrary, and determined by the designer of the
information system.
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Block - A block is a group of contiguous characters recorded on and
read from magnetic tape as a unit. A block may contain less than one,
one or more than one logical records.
Volume - In this standard and related USASI standards, this term is
completely synonymous with "reel of digital magnetic computer tape".
Label - A label is a block at the beginning or end of a volume or a file
which serves to identify, describe, or delimit that volume or file.
Label Group - A label group is'a collection of contiguous labels of
the same type.
Graphic Character Set - A graphic character set is the collection of
printed symbols which corresponds to specific bit configurations
present on a file. These include the alphabet, numerical digits and
all manner of special graphics such as punctuation marks, foreign
alphabets, mathematical symbols etc.
Control Character Set - The control character set consists of non-printing
characters which control the physical action of devices attached to the
computer. Examples are start of message (SOM) and end of message (EOM)
on teletype machines or the End of file character (EOF) which Delimits
both the beginning and end of tape files.
Collating Sequence - The collating sequence is the order in which
the computer which prepared the file sorts the character set. For
example, in some computers the alphabet tests lower than numeric
characters; in others numbers are low. Therefore in tape files the
sequence which two records labeled "A-l" and "A-Z" respectively would
be different depending on the collating sequence.
Shelf Life - For purposes of this standard, denotes the time that data
recorded on magnetic tape can be guaranteed readable under various
conditioning and storage procedures.
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5. Procedures for Submission and Recall of Maen.eticTa es to FRC's.
This section describes the procedures and services available at FRC's
regarding storage and retrieval of magnetic tapes. Three grades of storage
and retrieval service are available to data originating agencies. The types
of storage and retrieval services together with the documentation and pro-
cedures required to meet these grades of services are described in the
remaining paragraphs of this section.
5.1 Grades of Storage and Retrieval Service - Three grades of storage
service are available. These are:
'A' Service - Provides shelf storage space only. No conditioning
of tapes or guarantee of data safety is made. Tapes may be stored
in unconditioned space.
'B' Service - Magnetic tapes whose data is to be retained with a
guarantee of shelf life. These tapes will be tested, conditioned
and.stored in environmentally controlled space.
'C' Service - Magnetic tape with data of archival value or for which
individual data record retrieval is desired. The physical processing
and storage conditions of these tapes will be the same as for 'B'
service.
Each of these storage services will have an equivalent capability of
retrieval service associated with it. These are:
- For 'A' service, retrieval will normally be by box number
at the FRC.
- For 'B' service, retrieval will normally be by reel or
group of reels.
For 'C' service, retrieval will normally be by file or
file set. An additional capability will be selective
retrieval of individual records or record groups.
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5.2 Accessioning of Magnetic Tape Files at an FRC - The magnetic tape
accessioning section of a Federal Records Center will be responsible for
performing the validity checking, inspection and conditioning of all
magnetic tapes which require 'B' or 'C' service. Tapes requiring 'A'
Service only, will be accompanied with a Standard Form 135 and will be
stored only. Such a set of tapes may contain any arbitrary mix of files,
formats and data.
Tapes submitted for 'B' or 'C' service must contain. the documentation and
labels required for that grade of.service. A reel of tape containing
field and record content descriptions may be submitted in lieu of Standard
Form 135-MT.
Tape files which fail to meet the label standards described in section 6
of this standard may be returned to the agency for correction. However,
minor deficiencies may be corrected at the center itself in cooperation
with the originating agency.
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5.3 Forms Required for Submission of Magnetic Ta es - A different amount
of information is required for each grade of service requested by the
submitting agency. The 'A' Service requires only that the present
Standard Form 135 be submitted with boxes of tapes. The 'B' Service
requires that Standard Form 135-M be correctly filled out and submitted
with each File or File Set of tapes. Instructions for filling this form
out will be found in the Records Management Handbook entitled "Submission
and Retrieval of Magnetic Tapes to Federal Records Centers" The 'C'
Service requires that Standard Form 135-MT be correctly filled out in
addition to Standard Form 135-M and submitted with each File and File Set.
Instructions for filling out this form correctly will be found in the
Records Management Handbook.
If the labels at the beginning of the file are already recorded on tape,
Standard Form 135-M need only contain a notation to that effect. A
printout of the label records should also accompan?r the file documentation
so that the accessioning branch may check it for completeness.
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5.4. Physical Standards of Tapes Being Submitted for Storage - No
quality check will be made of magnetic tapes submitted under the
'A' Service. Therefore, Tape quality is solely the responsibility
of the submitting agency. Tapes which require 'B' or 'C' service
must meet minimum standards of physical quality as specified in
Appendix B of the handbook. Meeting these standards will
insure that the tape material will not deteriorate with age over
the retention period.
Other physical standards checks will guarantee that the data was
received at NARS, was readable on a tape drive at that time, and
will be processed for long term storage and safeguarding of the
information contained on that file.
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10
5.5 Recall and reference procedure - Until a pe manent recording medium
is found to store magnetic tape information, files recalled by an agency
within shelf life will be on the same reels originally submitted. Upon
return of these reels to an FRC, they will be physically inspected and
processed the same as a new accession. This will ensure the safety of
the information. However, the administrative accession procedure will
not be repeated. Standard Form 11-M will be used to recall and return
tape records to an FRC. When record sampling or sections of a tape file
are required, the record selection criteria must be specified by the
requestor on Standard Form 11-M. This grade of service must be coordinated
with the Reference Section of the specific FRC.
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5.6 Restrictions on Use of Records - Reference requests will be serviced
in accordance with any access restrictions or security classifications
indicated on the Standard Form 135-M. These restrictions will be observed
in the same manner as those on paper records.
Originating agencies wishing to establish specific release limitation
or security classification codes for the magnetic labels may do so in
coordination with MARS. One position in both the volume header and file
header label records is provided in this standard. Since any character
is allowed in these two positions, as many as 60 or 120 release limitations
and security classifications are available to each agency depending on the
number of binary bits in a character. The volume label header accessability
field denotes the highest classification of the physical tape. The File
label header accessability field denotes the accessability of a particular
file of records on that reel. Reel security classification may not be
less than the highest security classification of any single file or record
on that tape.
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6. Label Contents on Magnetic Tape
The proposed USASI Standard Magnetic Tape Label for Information Exchange
(X.3.2/552; June 7, 1967) is the basis upon which this label standard is
designed. This standard is supplemental to the proposed USASI standard
in that several label records otherwise denoted as optional are mandatory
on tapes being submitted for long term retention or archival storage to
Federal Records Centers.
The magnetic tape label requirements vary with the grade of service required
by the agency. These are as follows:
- 'A' Service; no magnetic labelling requirements.
- 'B' Service; requires all Required USASI Labels and the following
optional labels.
a. Second File Header label (HDR2) as specified in 3.3.3 of USASI
standard and includes here in section 7 for reference.
b. User Volume labels (UVLl) specified in Section 6.1.1 of this
standard
- 'C' Service; requires all labels specified it 'B' Service plus the
User Header Labels (UHLX) described in section 6.2 of this standard.
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6.1 Arrangements of Labels and Tape Marks on Magnetic Tape Reels,- The proposed
USASI Tape Label Standard makes mandatory the presence of four labels at a
minimum for each reel of tape. Their names and reference section numbers in
this standard where specifications for their contents are as follows:
a) Volume Header label (Section 7.1)
b) First File Header Label (Section 7.2)
c) First End-of-File Label (Section 7.3)
d) First end-of-volume label (Section 7.4)
6.1.1 Structuring the File. In order to allow validation and certification
of data records on tapes submitted for grade 'B' and 'C' service, required
labels and tape marks shall be used to establish the file structure
according to the following rules, as illustrated in Figure 6.1-1. In
that figure, the beginning of the tape is at the left, and the end of the
tape is at the right. Required labels are indicated by the first 4+
characters of their identifiers, and tape marks are indicated by asterisks
(')?
The rules and the figure are presented as though there were no optional
Operating System Labels or User Labels. Rules for using these optional
classes of labels are set forth in later sections.
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Figure 6.1-1
FILE STRUCTURES - B and C Service
Single Volume File
VOL1 UVLl UVL2 --- UVL9 HDR1 HDR2 --- HDR9
(UHL1 UHL2---- UHL2) * ---Data Blocks---EOF * #
Required for 'C' Service only
MULTI Volume File - First tap e
VOLT UVLl UVL2 --- UVL9 HDRl HDR2 --- HDR9 UBLI
UHL2---UHLn*---Data Blocks --- *EOV**
MULTI Volume File - subsequent tapes
VOLT HDR1 *---- Data Blocks--- *EOV**
VOLT HDR1 *---- Last Volume Data--- *EOF
MULTI File Volume
VOLT UVLl UVL2---UVL9 HDRI HDR2---HDR9
(UHLl UHL2 UHL2 --- UHL2) * -- File A -- *EOF * HDRI * ----File B---
Required for 'C' Service only
MULTI-Volume Multi-File; First Reel
VOL1 UVLl UVL2---UVLn HDR1 HDR2---HDR9
(UHL1 UHLl UBL2---- UHL2)*---File A--- *EOF2+
*HDR2*--- File B--- *EOV**
MULTI-Volume Multi-File; Intermediate Reels
VOL1 HDR1 *--Continuation of File B---* EOV
MULTI-Volume Multi File - Last Reel
VOLT HDR1 *---End of File B---*EOF* HDR1*---File C--- * EOF
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15
Volume Header Label. Every volume shall have a Volume Header Label as the
first block in the volume. The Volume Header Label shall not be used at any
other place in the volume.
File Header Label. Every file shall be preceded by a File Header Label.
Whenever a volume ends within a file, the continuation of that file in the
next volume shall also be preceded by a File Header. Every File Header
shall be immediately followed by a Tape Mark.
File Trailer Label. The last block of every file shall be followed by a File
Trailer Label. A. Tape Mark shall immediately precede, and another Tape Mark
shall immediately follow, every File Trailer. The File Trailer that appears
at the end of the last (or only) file in a volume set shall be followed by two
Tape Marks, rather than one.
End-of-Volume Label. Whenever a volume ends within a file, the last block of
the file in that volume shall be followed by a Volume Trailer Label. One
Tape Mark shall immediately precede, and two Tape File sets shall not be
terminated by an End-of-Volume Label.
6.1.2 Whenever end-of-volume and end-of-file coincide, the labelling
configuration shall be one of the following:
VOLIHDR1 * * EOF * HDRl* - - - File B - - -
(A) (A) (B)
Figure 6.1-2
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Figure 6.1-3
6.1.2.1 An an option, it will be allowable that any- file of a set may
start at the beginning of a volume. If this procedure is used, the
labelling configuration of Figure 6.1-4 must be followed for all
intermediate (but not first or last) volumes.
--- File A --- *EOF (A) * EOV
VOLT IDRI (B) * --- File B ----
Figure 6.1-4
This configuration permits the initiation of any file within a file
set at the beginning of a volume. When this configuration ist.sed,
the block count (field 12) of the end-of-volume label is undefined.
In addition, file sets will not be terminated by an End-of-Volume
label group.
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Form
Field Length Columns Field Name Description
1
4
1-4
Label Record
Identifier
2
3
5-7
Record Name Number
3
4
8-11
Occurs maximum
count
4
4
12-15
Occurs control field
5
4
16-19
Length-maximum
number of characters
in record
6
1
20
Length-type
7
4
21-24
Length-control
field number
8
1
25
Redefined-Y/N
9
3
26-28
Redefines-record
name number
10
4
29-32
Parity Control field
11
20
40-59
Record Name
12A
20
60-79
Comments
Must be "UHLl"
Must be consecutively numbered from
001
For Header-trailer file structure,
indicates maximum number of trailer
records. If no repetitions, leave
field blank.
Enter number of data field of UHL2
which gives count of trailers.
Otherwise leave blank,
Enter maximum logical record size in
characters or BYTES
Describes record format see table
6.2.1 for contents required.
If record length is indicated by a
data element, enter the Field name
label number from the appropriate
UHL2 label record.
If the file contains multiple record
formats enter a "Y". If not, enter
ITNtr
Enter the Record name number of the
record which may share storage with
record. (e.g. Trailer 1, number 003
is receipt, Trailer 2, 004 is shipment,
Normally blank, unless tape is recorded
in mixed (BINARY and DISPLAY) mode format
with a look-ahead field. Enter the
number of the field denoting parity of
the next block.
Contains alphabetic name of record
May be extension of record name or
text description
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Form
Field Length Columns
Field Name
12B
4
60-63
Key 1
13
4
64-67
Key 2
14
4
68-71
Key 3
15
4
72-75
Key 4
16
4
76-79
Key 5
17
1
80
Continuation
Indicator
Descriptioi.
Field number of major sort key if file is
3eouenced. Otherwise blank
Field number of intermediate and minor
sort keys if file is sequenced. Otherwise
blank
Indicates that this label is continued
on next line. Used only for comments and
sorting key extensions. If "X" is
entered, sorting key numbers are entered
in 60-79. If 'C' is entered entire next
label from columns 8 to 79 may contain
teat. Columns 1-7 must be duplicated.
If blank, no continuation cards will
follow.
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
6.2 User Volume Labels-Two types of user volume labels are required to
meet the requirements of Archival storage and retrieval. One type describes
the character set, whether the USASI standard, a NABS registered non-
USASCII-8 standard commercial character set or a unique non-standard
coded character set. A second type describes the record formats on
tape for purposes of processing, conversion and retrieval with a minimum
of supplemental information recorded on paper documentation.
The label requirements are designed to furnish information to computer
operating systems in the future so that both format and code conversion
can take place without the requirement for unique computer program
writing for each file/computer combination.
Only one User volume label is required to specify a standard or NARS
registered non-standard graphic character set and collating sequence. A
more complex set of labels is required to completely specify special
graphic character sets and collating sequences. Situations where these
labels would be required are special graphic character sets and collating
sequences which do not conform to the binary character value sequence of
the USASI standard.
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
6.2.1 User Volume Labels for Standard USASCII-8 and Registered non-standard
character sets.
Only one User Volume Label is required to specify the character sets,
collating sequence and graphic printing characters of tapes recorded under
these standards. Appendix C lists the current registered standards and
contains a copy of the USASCII-8 Code for Information Exchange.
Field
Name Length
Description
1
Label Identifier 3
Must be "UVL"
2
Label Number 1
vi,st be "1"
3
User Volume Label Count 2
M..ist be "Ol"
4+
GRAPHIC Character Set Identifier
Must contain Identification
L2
cf registered character code
s{.t and collating sequence
1-yft justified and blank
"
8"
f__led. e.g.
USASCII-
(,-r? "IBM-:EBCDIC" or "HON-BCD-
Cmll
5
Reserved for future use 62
Blank
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
User Volume Labels 2 to 9
Field Name Length Description
1 Label Identifier 3 Must be "UVL"
2 Label Number 1 Must be 2 to 9
Graphic character set codes Variables Beginning with the USASCII
in USASCII Code sequence space graphic and ending
with the USASCII Delete (DEL)
character, indicates the
actual bit configuration used
to print a given display
character. For reference
purposes, if the USASCII-8
or USASCII seven bit code is
not used enter the codes in
the USASCII sequence.
Example: The letter capital "N" in USASCII-8 code is shown as the two
hexadecimal digits "AE"; the same letter in IBM's EBCDIC code is represented
by the two hexadecimal digits "D5". The code "D5" is to be entered in
character position 47 of the standard graphic character set.
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
6.2.2 User Volume Label for non-standard character sets and collating
sequences.
More than one User Volume Label is required to specify non-standard character
sets. This section describes the formats and entries needed to furnish
intelligible information to a future computer operating system.
5
Name
.Length
bescri than
Label Identifier
MUST be "UVL"
Label Number
1
Must be
User Volume Label Count
2
Must be count of labels
Graphic character set count.
12
As defined in USASCII-8
st,a..idard. Must be an integer
zero filled to left.
Control character set count.
3
As defined in USASCII-8
staoo-dard. Must be an
integer, zero filled to
lef:,.
6 Non-standard graphic character Requires NARS Registry
set count. ft er in field 9, below.
Muss; be an integer, zero
filled to left.
7 Non-standard control
character set count
Requires NARS Registry
N,amrer in field 10 below.
M~~st be an integer, zero
f?_l::`_ed to left.
8 Collating Sequence of character "BIJ]" or "SPE" If collating
set. sequence is based on Binary
values, enter "BIN". If
(AhE r than Binary, enter "SPE".
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
23
Field Name Length Description
9 NARS non-standard graphic 10 Alphanumeric registry
character set registry number, left justified and
number space filled. Identified
document containing pictures
of non-standard graphic
characters.
10 MARS Eton-standard control 10 Alphanumeric registry
character set registry number, left justified and
number space filled. Identified
document containing speci-
fications of machine actions
not specified in USASCII-8
control character set. e.g.
Photocomposition device control
characters.
11 Reserved for future use 30 Blank at present.
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
6.3 User Header Labels - These labels are required only for 'C' grade
service or when digital tapes are being submitted to the Archives of the
United States. They must be in front of the firs: reel of a file or file
set. Complex file structures and record formats may require several
hundred label records to adequately define the records, fields and codes
within a file.
It would be inefficient to read up to several hundred label records each
time a file is processed on a computer. Therefore, a separate User
header label tape, not normally processed with the file at its originating
agency is the recommended technique for furnishing the required information.
The information on this tape is designed not only to furnish information
to a computer operating system for reading, but when printed on paper for
human comprehension. An additional by-product of this label tape is the
ability of one special software system to provide reference and retrieval
service for the indefinite future.
Two types of user header labels are required to furnish this capability.
The first is required to describe the record types, names and lengths
found on the tape. The second is required to define the structure and
content of the data elements within each record in the file. Included
are the definitions of each code value within each field. A printout of
these label records is thereby made largely self-e~mlanatory. This
capability is extremely important where researchers wish to extract
samples and tabulations and otherwise manipulate automated data records in
the future.
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 Approved For Release 2001/08/09 : CIA-RDP74-00390R000300440012-4
6.3.1 User Header Labels - I; File and Record Definition Form
This format is required to furnish information to the File Input-
Output Control System (IOCS). The functions of blocking, deblocking
counting and routing records. into the appropriate areas is the computer
memory for specialized query and processing is directed by the information
contained in these labels. The specific content requirements of form 135-MT
Part 1 are described below.
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
Table 6.3.1
Record Length Type Codes (Column 20)
and Control Number Field Ent'ie?
Code in
nolumn 20
Description
Contents of
Control # Field
F Fixed alphabetic records. Packed decimil
allowed
Variable length alphabetic records wit,,
length in characters specified in decimal
V Variable length records with length in char-
acters specified in Binary (Binary Recording
Mode only)
Number of length
control field
Number of length
control field
Symbol controlled unblocked variable length Blank
records (Separator characters must be identified
in character set label record)
T Blocked symbol controlled variable length Blank
records. Record mark separator character
must be identified.
Note: File Header Label 2 (HDR2) contains block length information
through which the blocking factor can be calcuLated.
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 Approved For Release 2001/08/09 : CIA-RDP74-00390R000300440012-4
PROPOSED STANDARD FORM 135 MT (PART 1)
Page _ of _
F I L E A N D R E C O R D D E F I N I T I O N L A B E L S
UHL
1
LE
NG
TH
PARITY
C
REC.
OCCUR
OCCUR
T
CONTR
RE
DEF
CONTR.
CONII ENTS OR SEQUENCE CONTROL
0
NAME
MAX
CONTR.
'MAX.
y
FIELD
REC
FIELD
R E C 0 R D N A M E
.
1J
NO.
COUNT
FIELD
CHAR
P
E
NO.
14
/
14
.
NAME
N0.
NO.
y 1
y 2
:ICY 3
KEY
KEY 5
T
z
!3
4'
~3
I !
Zc4C~~lE 0, F, A -FXC-D-1LLN T
y4R - ,4Q E- L NTH-R~.CoRO
171
I Zz1 3'
6
D
P c j L- F~- L~- C B N1 IP a L S- C- N
T N i= N C-1
I
MQ -CUNrl~o LL E - LE e--,,r eRE
rOl
cdRl9I
6
2
/
$
S
F
oil
2
1
1 ED- a~~ T>gP,E, Ngr2 -OEc
I
M G IT-t1 tovlK IAD
I I
~1
I I I I
t 1
1 I I
J
I I
1 I I I
I
I 1 I I
I I I I
I I I
I I I
I ! .1 I
1 I I 1
I I I I
1 I 1 I
1 I I I
1 1
Proposed Standard Form 13A&roved For Release 2001/08/09 :.CIA-RDP74-00390R000300440012-4
 Approved For Release 2001/08/09 : CIA-RDP74-0039OR0002R0440012-4
6.3.2 USER HEADER LABELS - II; FIELD DEFINITIONS
This label format is required for all digital data tapes being
submitted to the archives of the United States or for which grade
service is required. The purpose of this information is to
allow computer selection of individual records or record sets
from tape files. This selection will be specified by a requestor
using the field descriptions and code values indicated. in these
labels. The other major purpose of these labels is to make the
record descriptors themselves self-explanatory.
Following is the description of the specific ertries required
to describe the field structure and contents of digital data files.
This is form 135-MT Part 2.
Approved For Release 2001/08/09: CIA-RDP74-00390R000 0 44
 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300WO12-4
USER HEADER LABEL 2 INSTRUCTIONS.
Form
Field Length Columns Field Name Description
1
4
1-4
Label Record
Identifier
2
4
5-8
Field Name Number
3
3
9-11
Record Name Number
4
4
12-15
Repetition
Max Count
5
4
16-19
Repetition Count
Field Number
6
1
20
Field Length-
- Type
7
4
21-24
Field Length-
Maximum
8
4
25-28
Field Length-
Control Field
Number
9
2
29-30
Field Length
Symbol Value
Must be "UHL2"
Must be an increasing number on
consecutive labels except; value
or continuation labels must have same
number as content description label.
Must be identical to one of the "UHGI"
record name numbers.
Enter the maximum number of times this
field may be repeated in an individual
record as an integer. If not repeated,
leave blank.
If the repetition count varies from
record to record, enter the field name
number which indicates the number of
times this field appears in record.
Otherwise leave blank.
Enter the one character code which
denotes the manner in which field
length is determined. See Table
6.3.2.-l on allowable entries.
Enter the maximum possible length of
the field in Bits, Bytes, or characters
as appropriate.
If the field is variable in length with
type 'V' in form column 20, enter the
field name number of the counter field.
For other required entries see Table
6.3.2.-l.
.control symbol used to indicate field
boundaries. See Table 6.3.2.-1 for
discussion of heirarchies of control
symbols and word marks.
If the field length type is 'S', enter
the octal or hexadecimal value of the
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
30
Form
Fild Length Columns Field Name Description
3
31-33
Field Format/
Content-Type
11
15
34-48
Field Format/
Content-Picture
or Value
t2
20
4+9-68
Data Name
11
69-79
Comments
Contains a three letter code denoting
format of the field. See Table 6.3.2.-2
for allowable entries.
May be blank or contain format
description or value entries depending
on prior field. See Table 6.3.2-2 for
allowable entries.
Contains any 20 alphanumeric characters
with no imbedded blanks if field is
being used tc hold name.
May be blank or contain any additional
descriptive information.
1_4 1 80 Continued Indicates tha this is a continuation
of the preceding label record if it
is not blank. A suggested entry if
more than one continuation label is
required would be serial numbering of
the continuation labels.
Note: If Form Column 80 is not blank entire label from form column!,'_ to 79 is
available for any textual description desired. As many as 15 continuation
labels may be attached to one field definition.
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 Approved For Release 2001/08/09 : CIA-RDP74-00390R000300419012-4
Table 6.3.2.-l
FIELD LENGTH TYPE CODES ON
USER HEADER LABEL 2 (UHL2) RECORDS
Code Entry Description
Fixed length field
Variable length field - Length is indicated
by. Field Name number entered in Form Columns
25-28 (Field Length - Control Field Number)
which must match another User Header Label 2
record.
Variable length field-separator symbol
controlled. The octal or hexadecimal
value of the field separator character must
be entered in the "Field Length-Symbol Value
Field".
Variable length field group or subrecord.
This code is intended for symbol controlled
field group with multiple level separator
symbols. In this case, the label field
"FIELD FORMAT-TYPE" must contain the entry
"CON" to indicate that the "PICTURE" field
contains the control symbol heirarchy. The
primary use of this entry type is in formatted
file structure.
This entry is used to denote repeating field
groups which are count controlled. In this
case, the repetition field must contain a
count and "FIELD LENGTH -CONTROL FIELD NUMBER"
must contain a Field name number present within
the record group.
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 Approved For Release 2001/08/09 : CIA-RDP74-00390R000300440012-4
32
Code Entry
Table 6.3.2-2
FIELD FORMAT/CONTENT TYPE CODES
Description
Field characters are standard alphanumeric
graphic symbols. "PICTURE" must be used
to indicate numerics and decimal fractions.
Packed Decimal Number
(4 Bits per character)
Fixed point binary number. Use "PICTURE"
to indicate binary point
Floating point number composed of
display characters.
Floating point number composed of packed
decimal numbers.
Floating point number composed of
binary numbers.
Complex numbers in floating point
binary format.
Complex number in fixed point bina
format.
Requires COBOL "PICTURE" clause
characters to describe field.
Note: "PICTURE" characters are optional
on all other type entries.
Defines thi.; user :header label as one
containing a code value and description
of that value. Used primarily to define
code characters. The "VALUE" field
requires the format 'AAA = CODE DESCRIPTION'
where "AAA" may be any number of code
characters. (e.g."01 = RECEIPT")
Use D to display control character heirarchy
if field length ty_oe code is 'G'. Field
separator codes are shown in picture field
of label.
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
PROPOSED STANDAR_ FORM 135 MT (PART 2)
REPET
ITION
FIELD
LENGTH
FIELD
REC.
COUNT
T
Y
CTRL.
FIELD FORMAT/CONTENT
D A T A N A M E
COMMENTS
C
0
~-
NAME
1:U4BER
f-
NAME
NO.
MAX
COUNT
!z
FIELD
NO.
t
E
2,
MAX.
.11
FIELD
NO.
25
SYM
VAL
Z
TYPE
j1
PICTURE OR VALUE
4
6,
id
T
`+=
0
STPrAID,q RD - F E t DI
F
3
sr
! 16, (q V~ sf 9)
Frxr - or ur- BI
rr ?
/
U SIC-
D TQ
DEF
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N
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F //u S 1
/~ 4 T C f INE
_1 1,
o1RD !- S'T ,
3
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VA1 1 14d3c>': -LE~`6TN-FI*Et_
01, Syr ,0. L
.01 01OLq-
01 ?
1
1,71
V_
1 1610
010111Y
P,r,s
VA,R, ,R,AILE'FrFLDrj Cov/1
C = ENGTIf
Ot
(
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SS uNED%SZFaED ~P- eP
V-Wa2D,
b
F
/
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S S v~EP-- I NTE'~ R-uruLE
Ss PT Tu
7
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12
8
1 (9
UNS iGNr 8 `RY C00E
SEA- dEf:ow
V L-
I = 5ff /MENT
VPrL
(bill PT
itf}L
3 =E ~~?Fnfcy Rb
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9= BA~k 0 DER
7
z
Ttl
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CC/ E T F"rELD L- TE
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'17 T
i&i _F11.E-1SI?I i i
lit
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It
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ii!
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I
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Page of
Proposed Standard Form 135 MT U,
Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
7. USASI REQUIRED LABEL CONTENTS
This section describes the field contents and formats of the four required
labels of the proposed USASI standard. They are included here for reference
purposes. Their place on the tape is as shown in Fits e 6.1-1.
In this section; the letter "a" denoting character type means any alphanumeric
character. The letter 'n' denoting character type mer.ns decimal digits only.
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 Approved For Release 2001/08/09 : CIA-RDP74-00390R000300440012-4
7.1 Volume Header Label. Format
Field Length
Field Name
1
3
Label Identifier
2
1
Label Number
3
6
Volume Serial Number
4
Accessibility
Description
Must be VOL
Must be 1
Six "a" characters permanently assigned
by the owner to identify this physical
volume (i.e., reel of tape).
An "a" character which indicates any
restrictions on who may have access
to the information in the volume. A
"space" means unlimited access; any
other character means special handling,
in accordance with instructions furnished
with the Standard Form 135-M.
5
6
26
14
Reserved for Future
Standardization
Owner Identification
7
28
Reserved for Future
Standardization
8
l
Label Standard Level
Must be "spaces"
Any "a" characters, identify the owner
of the physical volume. Pending the
development of a standard Federal
government wide agency code, the contents
should be furnished on the standard form
135.
Mast be "space"
formats on
this volume conform to the requirements
of this standard. Tapes submitted for
'BI and 'C' grade service must contain
a l here.
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
36
7.2 First File Header Label Format
Field Length Field Name Description
1
3
2
1
3
17
4
6
5
4
6
4
7
4
3
2
9
6
Label Identifier Must be HDR
Label Number Must be 1
File Identifier Any "a" characters which must be shown
on the Standard Form 135-M.
Set Identification Any "a" characters to identify the set
of files of which this is one. This
identification must be the same for
all files of a multi-file set.
File Section Number The file section number of the first
Header Label of each file is 1. This
applies to the first or only file on
a volume and to subsequent files on a
multi-file volume. This field is
incremented by one on each subsequent
volume of the file.
File Sequence Number Four "n" characters denoting the
sequence (ie-000l, 0002, etc.) of files
within the volume or set of volumes.
In all the labels for a given file,
this field will contain the same number.
Generation Number Four "n" characters denoting the current
(optional) stage in the succession of one file-
generation by the next. When a file is
first created, its generation number
is 1.
Generation Version Two "n" characters distinguishing
Number (optional) successive iterations of the same
generation. The generation version
number of the first attempt to produce
a file is 0.
Creation Date A "space" followed by two "n" characters
for the year, followed by three "n"
characters for the day (001 to 366) within
the year.
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 Approved For Release 2001/08/09 : CIA-RDP74-00390R000300440012-4
37
7.2 (contined)
Field Length
Field Name
{
10
6
Expiration Date
11
1
Accessibility
12
6
Block Count
13
13
System Code (optional)
14
7
Reserved for future
standardization
Description
Same format as Field 9. This file is
regarded as "expired" when today's
date is equal to, or later than the
date given in this field. When this
condition is satisfied, the remainder
of this volume may be overwritten. To
be effective on multi-file volumes
therefore, the expiration date of a file
must be less than, or equal to the expire.-
tion date of all previous files on the
volume.
An "a" character which indicates any
restrictions on who may have access to
the information in this file. A "space"
means unlimited access; any other
character means special handling, in
accordance with the instructions furnished
with the Standard Form 135-M
Must be "zeros".
Thirteen "a" characters identifying
the Operating System that recorded this
file.
Must be "spaces".
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
38
7.3 First End-of-File Label Format
Field Length Field Name Description
1 3 Label Identifier Must be EOF.
2 1 Label Number Must be 1
3 Total Same as corresponding Same as corresponding fields in the
thru 50 fields in the First File First File Header Label.
11 Header Label (optional)
12 6 Block Count Six "n" characters denoting the number
of data blocks (exclusive of labels
and Tape Marks)since the preceding HUR
Label Group.
13 Total Same as corresponding Same as corresponding fields in the
and 20 fields in the First File first File Header Label.
14 Header Label (optional)
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
39
7.4 First End-of-Volume Label Format
Field Length
Field Name
Description
1
3
Label Identifier
Must be EOV
2
1
Label Number
Must be 1
3
Total
Same as corresponding
Same as corresponding fields in the
thru
50
fields in the First File
First File Header Label
11
Header Label (optional)
12
6
Block Count
Six "n" characters denoting the number
of data blocks (exclusive of labels
and Tape Marks) since the preceding HDR
Label Group.
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
APPENDIX C
NARS Register of Character Code Sets
1. Purpose and Scope
This section contains the register of acceptable character code sets
which may be specified in the User Volume Label 1 (UVL1). A magnetic
tape recorded in one of these codes is acceptable for submission to an
FRC for long term retention in excess of the current guaranteed shelf
life or for archival submission to the Archives of the United States.
2. Register of acceptable standard character code sets.
MARS - 00001 USASCII-8 standard (8 Bits)
NARS.- 00002 USASCII standard (7 Bits)
3. Expansion of Register
A project is underway to list the tape bit, parity and density configurations
of all digital tape drives in the Federal Inventory. Current plans call
for procuring equipment and accepting tapes recorded only in accordance
with FIP (Federal Information Processing) standards. In this case, the
applicable standard is FIPS-4 as published in the Federal Register.
FIPS-1+ references USAS X3.22-1967 entitled "Records Magnetic Tape for
Information Exchange, (800 BPI, NRZI)". Magnetic tape recorded in this
mode, either 7 or 9 track is readable on one of two types of tape drives.
Tapes recorded in other formats must eventually be converted to this
format or another applicable standard. If desired, MARS will provide
this service on a contract basis.
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 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
Character code sets not compatible with one of the USASCII standards
are translatable with appropriate computer programs. They will be
accepted provided there is a translation table on the labels or the
character code set is registered. Inquiries regardirg registered
character code sets should be addressed to MARS.
Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
 GEAPWT6WVFffSR 1fiIFMfT41AQ &8/09: CIA-R
NATIONAL ARCHIVES AND RECORDS SERVICE
MAGNETIC TAPE RECORD INVENTORY
4E0V89W000
004 @42' (FOR NARS USE)
3. AGENCY/OFFICE CREATING RECORD
4. LOCATION OF EDP INSTALLATION
5. OFFICIALS RESPONSIBLE FOR SYSTEM (Name)
6, BUILDING ROOM NUMBERS
7 TELEPHONE NUMBERS
A. SPONSOR
A.
A.
B. EDP COORDINATOR
B.
B.
11. DATES OF FILE
12. ONETIME STUDY OR SURVEY ('S)
13. PERIODIC UPDATE (Specify period)
A., FROM
B. TO
14. FILE SPECIFICATION DESCRIPTION (Enclose record format
15. DUPLICATION ELSEWHERE (Physical or content)
and data elements description)
16A. CPU MFG.
16B. MODEL NO.
17. NO. OF REELS
18. REEL LENGTH
19. BPI USED
20. NO. OF TRACKS
16C. TAPE DRIVE
16D. MODEL NO.
21. CURRENT RETENTION PERIOD
22. RECOMMENDED RETENTION PERIOD
23. DATE REELS WILL BE TRANSFERRED TO
NARS
Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
INSTRUCTIONS AND EXAMPLES FOR USE IN PREPARING
DATA ARCHIVES INVENTORY
SEC. I. PHYSICAL CHARACTERISTICS
-1. Type of reel
SEC. II. RECORDING MODE INFORMATION
1. Number of tracks
2. Density in BPI
3. Character code used
4. Frame parity
5. Mixed mode reading control
8. Logical and physical record
length control
7, 9, other
128, 200, 250, 556, 800, 1600, other
IBM, BCD, FIELDATA, BINARY, EBCDIC
even, odd, mixed
If parity varies from block to block, describe how software deter-
mines the parity of the block to be read. Example is lookahead bits
in the IBM 7090 series.
If fixed number of logical records per block, show number. If varia-
ble number of records per block, describe control technique in
8 below or use additional sheet if necessary.
If blocks and records are fixed length with no software control char-
acters, mark "NONE". If blocks or logical records have counter
fields specify mode with reference to system software manual; e.g.,
IBM 7070 IOCS, type 4 records.
Name DOS, MOD I Extended, etc.
Version number Revision 16
Level or type PCP, HASP, MFT-II, MVT
Most software systems allow considerable variation in label content
and placement even when using "standard" labels. The following
example shows a typical file structure and how it should be depicted
on the reverse side.
IHDR (84 characters) TAPE MARK CHECKPOINT/RERUN TAPE
MARK DATA RECORDS TAPE MARK EOF (end of file label) TAPE
MARK TAPE MARK
Such a sequence of records and tape marks should be shown on
line 6 as follows:
TM 0 LABELS 1 (LABEL LENGTH 84) TM 2 DATA RECORDS TM 1
FOR TM__EOF TM __,
Show, for example, as "between the two tape marks immediately pre-
ceding the data records."
Indicate whether and where the record counts are found in the trailer
labels or within a logical record such as the one containing the sen-
tinal characters. Hash and control totals other than record counts
are usually non-standard in all software systems. Therefore, indi-
cate what data fields are used and indicate whether binary or deci-
mal arithmetic is used.
GSA FORM 7091 (4.71) (BACK)
Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
DATA ARCHIVES INVENTORY
(Read Instructions on reverse)
FOR
NARS
USE
ONLY
6. LOGICAL RECORD LENGTH
LENGTH WORDS
FIXED
A
(1)
NONE
(2)
COUNTER
(3)
SPECIAL
CHARACTER
(4) DESCRIBE
LOGICAL
Q
E
(1)
(2)
(3)
(4) DESCRIBE
B
PHYSICAL
c
D
98. IS LAST BLOCK FULL LENGTH OR SHORT
SECTION III - RECORDING SYSTEM INFORMATION
I. CPU MANUFACTURER 12. MODEL NO.
7. BLOCKING FACTOR L Logical records per
FRAMES physical block)
UNDEFINED
11 - RECORDING MODE
BPI
0 CHARACTERS
VARIABLE
5. OPERATING SYSTEM USED TO GENERATE FILE
.~.~...,. ..n.~~., I LEVEL OR TYPE
REEL SEQUENCE NUMBER
LOCATION
1 12. PHYSICAL RECORD COUNT LOCATION
Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
 Approved For Release 2001/08/09 : CIA-RDP74-0039OR000300440012-4
INSTRUCTIONS PREPARING
DATA ARCHIVES INVENTORY
SEC. 1. PHYSICAL CHARACTERISTICS
?1. Type of reel
SEC. II. RECORDING MODE INFORMATION
1. Number of tracks
2. Density in BPI
3. Character code used
4. Frame parity
5. Mixed mode reading control
7. Blocking factor
8. Logical and physical record
length control
SEC. III. RECORDING SYSTEM INFORMATION
5. Operating system used
6. File Structure Information
Cassette, cartridge, reel, etc.
7, 9, other
128, 200, 250, 556, 800, 1600, other
IBM, BCD, FIELDATA, BINARY, EBCDIC
even, odd, mixed
If parity varies from block to block, describe how software deter-
mines the parity of the block to be read. Example is lookahead bits
in the IBM 7090 series.
If fixed number of logical records per block, show number. If varia-
ble number of records per block, describe control technique in
8 below or use additional sheet if necessary.
If blocks and records are fixed length with no software control char-
acters, mark "NONE". If blocks or logical records have counter
fields specify mode with reference to system software manual; e.g.,
IBM 7070 IOCS, type 4 records.
Name DOS, MOD I Extended, etc.
Version number Revision 16
Level or type PCP, HASP, MFT-II, MVT
Most software systems allow considerable variation in label content
and placement even when using "standard" labels. The following
example shows a typical file structure and how it should be depicted
on the reverse side.
IHDR (84 characters) TAPE MARK CHECKPOINT/RERUN TAPE
MARK DATA RECORDS TAPE MARK EOF (end of file label) TAPE
MARK TAPE MARK
Such a sequence of records and tape marks should be shown on
line 6 as follows:
TM 0 LABELS 1 (LABEL LENGTH 84) TM 2 DATA RECORDS TM 1
FOR TM_EOF TM _
10. Checkpoint location Show, for example, as "between the two tape marks immediately pre-
ceding the data records."
13. Control totals Indicate whether and where the record counts are found in the trailer
labels or within a logical record such as the one containing the sen-
tinal characters. Hash and control totals other than record counts
are usually non-standard in all software systems. Therefore, indi-
cate what data fields are used and indicate whether binary or deci-
mal arithmetic is used.
GSA FORM 7091 c?',A u (BACK)
~ppiuvud r e ease201708/09 : CIA-RDP74-00390R000300440012-4