[Federal Register Volume 61, Number 79 (Tuesday, April 23, 1996)]
[Notices]
[Pages 17876-17879]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: X96-10423]
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DEPARTMENT OF COMMERCE
National Institute of Standards and Technology
[Docket No. 960212025-6025-01]
RIN 0693-XX14
Approval of Federal Information Processing Standards Publication
177-1, Initial Graphics Exchange Specification (IGES)
AGENCY: National Institute of Standards and Technology (NIST),
Commerce.
ACTION: Notice.
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SUMMARY: The purpose of this notice is to announce that the Secretary
of Commerce has approved a revision of Federal Information Processing
Standard (FIPS) 177, Initial Graphics Exchange Specification (IGES),
which will be published as FIPS Publication 177-1. This revision adopts
the American National Standard Digital Representation for Communication
of Product Definition Data, ANSI/US PRO/IPO (United States Product Data
Association/IGES PDES Organization)-100-1993, Version 5.2, and the
specified application protocols. FIPS PUB 177-1 addresses IGES
implementation and data file acquisition, interpretation, and
conformance.
On April 12, 1995, notice was published in the Federal Register (60
FR 18583-18586) that a revision of Federal Information Processing
Standard (FIPS) 177, Initial Graphics Exchange Specification (IGES),
was being proposed for Federal use.
The written comments submitted by interested parties and other
material available to the Department relevant to this standard were
reviewed by NIST. On the basis of this review, NIST recommended that
the Secretary approve the revised standard as Federal Information
Processing Standards Publication (FIPS PUB) 177-1, and prepared a
detailed justification document for the Secretary's review in support
of that recommendation.
The detailed justification document which was presented to the
Secretary, and which includes an analysis of the written comments
received, is part of the public record and is available for inspection
and copying in the Department's Central Reference and Records
Inspection Facility, Room 6020, Herbert C. Hoover Building, 14th Street
between Pennsylvania and Constitution Avenues, NW, Washington, DC
20230.
This FIPS contains two sections: (1) an announcement section, which
provides information concerning the applicability, implementation, and
maintenance of the standard; and (2) a specifications section, which
deals with the technical requirements of the standard. Only the
announcement section of the standard is provided in this notice.
EFFECTIVE DATE: This revised standard becomes effective November 1,
1996.
ADDRESSES: Interested parties may purchase copies of this revised
standard, including the technical specifications section, from the
National Technical Information Service (NTIS). Specific ordering
information from NTIS for this standard is set out in the Where to
Obtain Copies Section of the announcement section of the standard.
FOR FURTHER INFORMATION CONTACT: Ms Lynne Rosenthal, telephone (301)
975-3353, National Institute of Standards and Technology, Gaithersburg,
MD 20899.
Dated: April 16, 1996.
Samuel Kramer,
Associate Director.
Federal Information Processing Standards Publication 177-1
Announcing the Standard for Initial Graphics Exchange Specification
(IGES)
Federal Information Processing Standards Publications (FIPS PUBS)
are issued by the National Institute of Standards and Technology (NIST)
after approval by the Secretary of Commerce pursuant to Section 5131 of
the Information Technology Management Reform Act of 1996 and the
Computer Security Act of 1987, Public Law 104-106.
1. Name of Standard. Initial Graphics Exchange Specification (IGES)
(FIPS PUB 177-1).
2. Category of Standard. Software Standard; Graphics and
Information Interchange.
3. Explanation. This publication is a revision of the FIPS PUB 177
and supersedes FIPS PUB 177 in its entirety. It provides a substantial,
upward-compatible enhancement of IGES Version 4.0. FIPS PUB 177-1
specifies new conformance requirements, the addition and use of
application protocols (APs), and increased enhancement, correction, and
clarification of the existing specification. It does not contain any
new requirements that would make an
[[Page 17877]]
existing conforming implementation nonconforming.
FIPS PUB 177-1 adopts the American National Standard Digital
Representation for Communication of Product Definition Data, ANSI/US
PRO/IPO (United States Product Data Association/IGES PDES
Organization)-100-1993, Version 5.2, and the specified application
protocols. FIPS PUB 177-1 addresses IGES implementation and data file
acquisition, interpretation, and conformance.
The purpose of the FIPS for IGES is to enable the compatible
exchange of product definition data used by dissimilar computer-aided
design and computer-aided manufacturing (CAD/CAM) systems. Utilizing a
neutral database format the IGES processor can create or translate two-
dimensional (2-D) or three-dimensional (3-D) vector-based digital
product model data. The standard specifies file structure and
syntactical definition, and defines the representation of geometric,
topological, and nongeometric product definition data. The exact
specification is in Section 10 of this standard.
4. Approving Authority. Secretary of Commerce.
5. Maintenance Agency. U.S. Department of Commerce, National
Institute of Standards and Technology (NIST), Computer Systems
Laboratory (CSL).
6. Cross Index.
a. American National Standard Digital Representation for
Communication of Product Definition Data, ANSI/US PRO/IPO-100-1993,
Version 5.2.
b. American Society of Mechanical Engineers/American National
Standards Institute (ASME/ANSI) Y14.26M-1989, Digital Representation
for Communication of Product Definition Data, IGES Version 4.0.
c. MIL-D-28000A, Continuous Acquisition and Life-Cycle Support
Specification, Digital Representation for Communication of Product
Definition Data: IGES Application Subsets and IGES Application
Protocols, February 10, 1992.
d. American National Standard, 3-D Piping IGES Application
Protocol, ANSI/US PRO/IPO-110-1994.
e. IGES Layered Electrical Product Application Protocol, Committee
Draft SAND94-2375, December 1, 1994.
7. Related Documents.
a. Federal Information Resources Management Regulations (FIRMR)
subpart 201.20.303, Standards, and subpart 201.39.1002, Federal
Standards.
b. Federal ADP and Telecommunications Standards Index, U.S. General
Services Administration, Information Technology Management Service,
October 1994 (updated periodically).
c. FIPS PUB 29-3, Interpretation Procedures for Federal Information
Processing Standards for Software.
d. NISTIR 4379, IGES Technical Illustrations Application Guide.
e. NISTIR 4600, IGES 5.0 Recommended Practices Guide.
f. NISTIR 5541, Initial Graphics Exchange Specification (IGES):
Procedures for the NIST IGES Validation Test Service.
g. MIL-T-31000, General Specification for Technical Data Packages.
8. Objectives. Federal standards for electronic interchange permit
Federal departments and agencies to exercise more effective control
over the production, management, and use of the government's
information resources. The primary objectives specific to IGES are to:
--Reduce the overall life-cycle cost for digital systems by
establishing a common exchange format that allows for the transfer of
product definition data across organizational boundaries and
independent of any particular CAD/CAM system.
--Exchange digital representations of product definition data in
various forms: illustrations, 2-D drawings, 3-D edge-vertex models,
surface models, solid models, and complete product models.
--Provide CAD/CAM implementation manufacturers with a guideline for
identifying useful combinations of product definition data capabilities
in any CAD/CAM system.
--Specify APs that can be used by Federal departments and agencies to
support the exchange of product data when applicable.
9. Applicability.
9.1 This FIPS for IGES is intended for the computer-interpretable
representation and exchange of CAD/CAM product definition data among
applications and programs that are either developed or acquired or
developed by a Federal agency shall include an IGES preprocessor and
IGES postprocessor capability. FIPS for IGES is designed to support the
exchange of 2-D or 3-D product definition data with rich attributable
information. It provides a data format for describing product design
and manufacturing information that has been created and stored in a
computer-readable, device independent form.
9.2. The FIPS for IGES shall be used when one or more of the
following situations exist:
--The product definition application or program is under constant
review, and changes may result frequently.
--It is anticipated that the life of the data files will be longer than
the life of the presently utilized CAD/CAM system.
--The application is being designed centrally for a decentralized
system that may employ computers of different makes and models and
different CAD/CAM devices.
--The product definition application may run on equipment other than
that on which it was developed.
--The product definition data is to be used and maintained by other
than the original designer.
--The product definition data is or is likely to be used by
organizations outside the Federal Government.
--It is desired to have the design understood by multiple people,
groups, or organizations.
For layered electrical product technology, three dimensional
piping, and engineering drawing applications, the use of the
appropriate AP or subset (as described below) is required for
implementation of this FIPS IGES.
An AP or subset provides a means to improve the fidelity of the
product data exchanged. APs are developed by domain experts for the
purpose of defining the processes, information flows, and functional
requirements of an application. An AP defines the scope, context,
information requirements, representation of the application
information, and conformance requirements. Initial release of this FIPS
for IGES publication includes two APs and one application subset.
--Layered Electrical Product (LEP) Application Protocol: The LEP AP is
used for the transference of 2-D electrical and electro-mechanical
product models. This AP is required for layered electrical products
technology applications, including specification control drawings,
circuitry, fabrication and final assembly of a layered product system.
--3-D Piping Application Protocol: The 3-D Piping AP is used for the
exchange of models from one piping modeling application to another.
This AP is required for 3-D piping and related equipment models,
including the fabrication and assembly of piping systems (e.g. pipe,
pipe fittings, attached equipment, piping supports, and insulation).
--Engineering Drawing (Class II) Subset (MIL-D-28000A): The Class II
subset is used for the exchange of the drawing model; including
geometric and annotation entities, attributes
[[Page 17878]]
such as color and line fonts, and organization information such as
levels and subfigures. This subset is required for the exchange of
engineering drawings and product data following MIL-T-31000 (General
Specification for Technical Data Packages).
10. Specifications. This FIPS adopts ANSI/US PRO/IPO-100-1993 and
the specified APs: Layered Electrical Product (LEP) Application
Protocol; 3-D Piping Application Protocol; and Engineering Drawing
(Class II) Subset (MIL-D-28000A). The ANSI/US PRO/IPO-100-1993 standard
for IGES, defines the communications file structure and format (i.e., a
file of entitles), language format, and the representation of product
definition data.
New entities and constructs are added with each revision and are
upwardly compatible. Thus, processor conforming to IGES Version 5.2
would be able to read and process an IGES Version 4.0 file, but the
converse may not be true. The capabilities brought to the IGES user
implementing the IGES Version 5.2 standard are:
--A new character set for the European Community;
--additional properties to the attribute table for Architecture/
Engineering/Construction (AEC);
--the addition of a new form of the drawing entity; and
--the addition of a new class of entity use, termed construction
information.
Conformance Requirements. Conformance is mandatory for this
standard and is applicable to all Federal department and agency
procurements. Conforming data files and processors mush adhere to all
the rules appropriate to specific features, such as entities, defines
within ANSI/US PRO/IPO-100-1993 and when applicable, one of the APs or
subset identified in this standard. Vendors of processors claiming
conformance to this standard shall complete documentation which
accurately indicates the processor's support of, and mapping between,
native and IGES entities.
A conforming preprocessor shall create conforming IGES data files
which represent the native database which was input to the
preprocessor. File content shall represent the native entities
according to the vendor's completed documentation. Unsupported native
entities shall be reported.
A conforming postprocessor shall be capable of reading any
complying data file without halting or aborting, including data files
containing unprocessible entitles. All unprocessible entities shall be
ignored. A conforming postprocessor shall translate conforming IGES
data files into the native database form of a specific CAD/CAM system.
It shall convert each supported entity into native constructs, which
preserve the functionality and match the geometry, attributes, and
relationships of the IGES entity in the file. The postprocessor shall
report on any IGES entities or features which have been discarded.
Any visual presentation of supported, displayable entities that is
produced by the processor, shall represent a visual appearance
equivalent to the examples appearing in ANSI/US PRO/IPO-100-1993 and,
if applicable, the AP or subset. The visual appearance shall depict the
functional intent of the database.
Conformance Rules for Application Protocols and Subsets. An
application protocol or subset which claims conformance to this
standard, must satisfy the following rule:
--An implementation conforming to an AP shall satisfy the conformance
requirements specified in the AP as well as the conformance
requirements in the ANSI/US PRO/IPO-100-1993 specification.
11. Implementation. The implementation of this standard involves
four areas of consideration: effective date, acquisition,
interpretation, and validation.
11.1 Effective Date. This publication is effective November 1,
1996. A transition period of twelve (12) months, beginning on the
effective date, allows industry to produce IGES implementations and
data files conforming to this standard. Agencies are encouraged to use
this standard for solicitation proposals during the transition period.
This standard is mandatory for use in all solicitation proposals for
IGES data files and implementations (i.e., computer-aided design and
manufacturing systems) acquired twelve (12) months after the effective
date.
11.2 Acquisition of IGES Implementations and Data Files.
Conformance to this standard should be considered whether the CAD/CAM
systems are developed internally, acquired as part of a system
procurement, acquired by separate procurement, used under a leasing
agreement, or specified for use in contracts for programming services.
Recommended terminology for procurement of FIPS IGES is contained in
the U.S. General Services Administration publication Federal ADP and
Telecommunications Standards Index, Chapter 5, Part 1.
11.3 Interpretation of FIPS IGES. Resolutions of questions
regarding this standard will be provided by NIST. Procedures for
interpretations are specified in FIPS PUB 29-3. All questions
concerning the specifications and content should be addressed to:
Director, Computer Systems Laboratory, ATTN: FIPS IGES Interpretation,
Building 820, Room 562, National Institute of Standards and Technology,
Gaithersburg, MD 20899.
11.4 Validation of IGES Implementations. Validation of IGES
implementations is not mandatory at this time. Testing of an
implementation's conformance to this FIPS IGES will be optional by the
agency. Government agencies acquiring implementations in accordance
with this standard may wish to require testing for conformance,
interoperability, and performance. The tests to be administered and the
testing organization are at the discretion of the agency Acquisition
Authority.
12. Waivers. Under certain exceptional circumstances, the heads of
Federal departments and agencies may approve waivers to Federal
Information Processing Standards (FIPS). The head of such agency may
redelegate such authority only to a senior official designated pursuant
to section 3506(b) of Title 44, U.S. Code. Waivers shall be granted
only when:
a. Compliance with a standard would adversely affect the
accomplishment of the mission of an operator of a Federal computer
system, or
b. Cause a major adverse financial impact on the operator which is
not offset by Governmentwide savings.
Agency heads may act upon a written waiver request containing the
information detailed above. Agency heads may also act without a written
waiver request when they determine that conditions for meeting the
standard cannot be met. Agency heads may approve waivers only by a
written decision which explains the basis on which the agency head made
the required finding(s). A copy of each such decision, with procurement
sensitive or classified portions clearly identified, shall be sent to:
National Institute of Standards and Technology; ATTN: FIPS Waiver
Decisions, Building 820, Room 509; Gaithersburg, MD 20899.
In addition, notice of each waiver granted and each delegation of
authority to approve waivers shall be sent promptly to the Committee on
Government Operations of the House of Representatives and the Committee
on Governmental Affairs of the Senate and shall be published promptly
in the Federal Register.
[[Page 17879]]
When the determination on a waiver applies to the procurement of
equipment and/or services, a notice of the waiver determination must be
published in the Commerce Business Daily as a part of the notice of
solicitation for offers of an acquisition or, if the waiver
determination is made after that notice is published, by amendment to
such notice.
A copy of the waiver, any supporting documents, the document
approving the waiver and any supporting and accompanying documents,
with such deletions as the agency is authorized and decides to make
under 5 U.S.C. Sec. 552(b), shall be part of the procurement
documentation and retained by the agency.
13. Where to Obtain Copies. Copies of this publication are for sale
by the National Technical Information Service, U.S. Department of
Commerce, Springfield, VA 22161. (Sale of the included specifications
document is by arrangement with the National Computer Graphics
Association and the American National Standards Institute.) When
ordering, refer to Federal Information Processing Standards Publication
177-1 (FIPSPUB177-1), and title. Payment may be made by check, money
order, or NTIS deposit account.
[FR Doc. 96- 9941 Filed 4-22-96; 8:45 am]
BILLING CODE 3510-CN-M