IGES RFC/ECO Authors

"There's no room in IGES for fragile egos!"
        <Steve Watts> Costa Mesa IPO Meeting (1993-01-13)
The following individuals authored RFCs and ECOs which have been incorporated into versions since IGES 1.0 was first published in 1980.

Here are some of the authors whose RFCs became ECOs. Their contributions have been extracted into individual pages for each author. (More will be extracted as time permits. :-)

Some of the RFCs submitted between 1981 and 1997 were never approved as ECOs, and the material never became a part of IGES. The remaining authors are listed on this page for the time being.

These lists have been extracted from pages maintained by the IGES Change Control Secretary at NIST. For the complete list, please visit the IGES RFC Index.

The following authors each wrote a single RFC. They are listed alphabetically.

 
RFC
Date
ECO
Title
Author
2225/2/84239 Add Composite Curve to base entities of Ruled Surface Frances Akridge
0593/12/82049Add a binary representation of IGES data Carole Avery
12610/14/83230 Add Color property Tibor (Ted) Berenyi
1711/16/84304 Clarify explanation of Entity Use Flag Robert Brookes
2244/16/84220 Add mapping measurements to Global parameter 15 James J. Carberry
5306/20/92  Clarify Boundary entity Jin Chou
0633/17/82054 Clarify text block parameters in 4.2.9 Donald K. Crockett
43111/16/88540 Define Null String in Glossary Robert Dernbach
26811/14/84307 Add statements to MACRO syntax Marc W. Durin
36710/7/86  Allow selective display of child entities of Subfigure Definitions Andrew Dvorak
43011/9/88526 Change form 63 Simple Closed Area to Simple Closed Planar Curve William H. Floyd
1298/3/83211 Change parameter requirements for Angular Dimension entity Chuck Gannon
2184/16/84213 Add conditionals to MACRO definition Dr. Ing H. Grabowski
4143/24/88531 Disallow use of 8-bit ASCII for IGES files Randy J. Harrison
48710/2/90  Better definition for a valid Centerline Joe Hoffert
40310/14/87  Add an associativity for entity view discrimination David Jansen
4769/26/89  Remove limitation from Rational B-Spline Surface entity Masaaki Kagawa
3649/15/86  Allow lower cals in real declaration Sudhir Kshirsagr
1338/29/83243 Add two form numbers for Ordered Groups to entity 402 Kevin Lane
4993/8/91627 Open Shell Bruce Ledbetter
3865/5/87566 Add a Curve Dimension entity Olga Lichten
204 215 Clarify coordinates of the Leader Arrow entity Gary Magoon
3362/25/86  Deprecate Flagnote entity, adding new form to General Symbol Pat McFadden
3617/23/86500 Disallow blank lines between sections in an IGES file C. Kevin McIntre
47310/13/89580 New DE requirements Information Carolyn F. Mindel
48810/8/90613 Curve on a Surface parameter splice Al Montano
0158/24/81  Repair Global 16 value in the example file David M. Moore
11210/11/83292 Redefine use of DE field 3 Charles B. Morrill
2456/8/84  Add a Spiral Curve entity W.E. Mullen
04112/14/81 028Add to the capability of the Ruled Surface entity Joseph Paciorek
002 027 Specify direction of Conic Arc Mark Quinlan
12810/10/83edit Add a figure name to parameters of Flash entity Wilson Rivera
31310/7/85410 Define justification of text in Flag Note text box Dave Sanford
59710/4/96  Track new version of the PIPing AP Robert W. Schuler
0876/3/82210 Clarify wording in MACRO section Roger Scowen - NPL
5125/25/91  Tabulated Cylinder enhancement M. Sebastian
3177/30/85  Define Line Width in terms of drawing units Kieth M. Smith
1101/6/83  Allow definition entities from separate IGES file Uwe Weissflog
4823/23/90    Tracy Whelen
26611/14/84310 Provide entity number range for MACROs Robert H. Wilson
3854/9/87643 Add Global for identification of file subset (AP) type R.C. Winfrey
4071/11/88588 Conformance clauses in specification: to be or not to be Tom Wright
4155/26/88  Limit use of Transformation Matrix entity Sheree Yang
1591/4/84  Deprecate the Region Fill Property Siu Fun Yu
27011/15/84312 Parametric Spline Charles Zonca

The following authors contributed more than one RFC, and will have their own pages when the WebMaster finds the time to extract them from this list. They are listed alphabetically by RFC number ... sort of.

RFC
Date
ECO
Title
Author
036   Add electrical design rules David J. Ellis
0623/17/82  Add Directionality property David J. Ellis
0715/14/82042 Add a Node entity James Farrell
0825/14/82  Add a Coordinate Systems entity James Farrell
0835/14/82040 Add Elements as a separate entity James Farrell
03712/10/81 029Add B-spline entities Richard D. Fuhr
1277/18/83  Add references to the mathematical B-Spline (appendix A4, A6) Dick Fuhr
3224/8/86412 Restrict range of values for B-Spline entities Dick Fuhr
3494/25/86422 Add interpretation definition to periodic flags in B-Splines Dick Fuhr
1308/15/83246 Clarify justification in DE Status fields Jim Fleming
1318/15/83248 Clarify Global value 20 Jim Fleming
1328/15/83247 Allign IGES with FORTRAN definition of constants Jim Fleming
1369/1/83299 Correct the External Reference entity Jim Fleming
26711/14/84305 Specify MACRO use for implementor-defined entities Jim Fleming
3404/28/86508 Deprecate the redundant External Reference entity Jim Fleming
3464/30/86421 Add a value for version 4.0 to Global 23 Jim Fleming
3988/17/87517 Revise description of the Compressed ASCII file format Jim Fleming
3998/17/87518 Correct justification in Terminate record fields Jim Fleming
40210/9/87  Add reference table of supporting documents Jim Fleming
040 038 Add hierarchy to DE Status fields 7 & 8 Robert Ivey
05212/21/81  Add Finite Element capability Robert L. Ivey
053   Add Modulus of Elasticity property Robert L. Ivey
054   Add Poisson Ratio Material property Robert L. Ivey
055   Add Physical/Real Constants entity Robert L. Ivey
056   Add Thermal Conductivity property Robert L. Ivey
057   Add Moment of Inertia entity Robert L. Ivey
058   Add Shear Modulus property Robert L. Ivey
1357/12/83232 Add a Tabular Data property Robert Ivey
0846/2/82  Add an Element Type property R. L. Ivey
0886/3/82041 Add three forms to the Transformation Matrix entity R.L. Ivey
1642/6/84234 Add a Load and Constraint entity Bob Ivey
2466/18/84231 Add a Three-noded Beam Element to the topology set Robert L. Ivey
247 233 Add Nodal Displacement and Rotation entity Robert L. Ivey
2496/15/84  Add a Finite Element Bulk Data entity Robert L. Ivey
3234/14/86413 Add FEM Nodal Results entity Robert L. Ivey
3244/14/86414 Add FEM Element Results entity Robert L. Ivey
3254/14/86414 Add FEM Constant Results entity Robert L. Ivey
0705/14/82  Add capability for clockwise direction in Arcs and Conic Arcs William R. Magretta
1038/13/82  Add an External Subfigure Definition entity William Magretta
1151/20/83  Allow a "library type" IGES file William Magretta
26911/14/84306 Add a default for the General Note entity William Magretta
1495/3/83409 Make names of parameter data values consistant Laura Mappin
1505/31/83258 Use a consistent name for additional pointers in PD lists Laura Mappin
03912/11/81  Add a Surface Display property Ralph Mayer
085 043 Add Symbol Font to Text Fonts Ralph Mayer
3659/10/86  Use of Feature Control Symbol in dimensions Ralph Mayer
0603/11/82  Add three associativities to support piping Patrick Rourke
0613/16/82  Add viewing form to Transformation entity Partick Rourke
2325/3/84235 Addition to Part Number property Pat Rourke
2335/3/84236 Add a Nominal Size property Pat Rourke
2345/3/84237 Add a Line Specification property Pat Rourke
2355/3/84238 Generalize the Composite Curve entity Pat Rourke
27111/14//84313 Add diagrams to clarify entity relationships in specification P.W. Rourke
27211/15/84308 Add new entities for reciprocal external referencing Pat W. Rourke
072 5/27/82   Add a branching instruction to the MACRO capability Steinmetz & Benini - Audi
073 5/27/82 213 Explicitly define MACRO variables as local in 4.4.3.5.2 Steinmetz & Benini - Audi
074 5/27/82 207 Move MACRO examples to follow syntax description Steinmetz & Benini - Audi
075 5/27/82 208 Correct MACRO Example 2 Steinmetz & Benini - Audi
077 016 Correct minor errors in version 2 draft J. Wellington
0785/30/82030 Correct Figure reference in version 2 draft J. Wellington
080 5/10/82 035 Add Index of Entities to specification Albert J. Gibbons
081 5/10/82 036 Add a Glossary to the specification Albert J. Gibbons
089 6/22/82 053 Clarify directionality in Angular Dimension entity Mark Quinlan
102 1/7/83   Add Solid Modeling primatives Dirk J. Schroeter
106 7/22/82   Change backpointer requirement in Views Visible entity S. Miller
107 10/11/82 290 Define setting of Status digits for constituent netities S. Miller
108 10/11/82 291 Clarify View List associativity S. Miller
117 4/6/83   Add an Alternate Representations associativity Noel C. Christensen
151 10/13/83 edit Deprecate Connect Node associativity William Hussong
152 10/13/83 291 Replace text in Appendix B (Electrical) Larry O'Connell
153 10/13/83 291 Deprecate the Text Node associativity William Hussong
154   245 Correct descriptions in first value of Property parameters Larry O'Connell
160 1/12/84   Add Offset Curve property Emmanuel Tsimis
161 1/12/84 223 Add an Offset Surface property Emmanuel Tsimis
162 1/12/84   Add a Trimmed Curve property Emmanuel Tsimis
163 1/12/84 303 Add a Trimmed (parametric) Surface associativity Emmanuel Tsimis
168 1/12/84   Proposed: a (changed entities only) Change Order IGES file Noel C. Christensen
198 1/27/84 274 Allow the same base entities for Rectangular and Circular Array David Saylors
199 1/27/84 288 Add a default value for Singular Subfigure Instance scale factor David Saylors
200 1/27/84 285 Correct errors in the Rectangular Array Subfigure Instance David Saylors
201 1/27/84 283 Correct errors in the Circular Array Subfigure Instance David Saylors
203 2/15/84   Add a Tool Path entity W. C. Burkett
206 2/1/84   Clarify Transformation Matrix re Hierarchy Flag Steven D. Marz
207 2/7/84   Make X, Y, and Z separately scaled in subfigure instances Leland H. Frayseth
211 4/27/84   Add a Signal String associativity William Hussong
213     Revise the Parametric Spline Curve entity David A. Fredricks
214 3/26/84 225 Create an Offset Curve entity Saul Rothstein
215 4/4/84 278 Apply headers to specification Dirk J. Schroeter
216 4/4/84   Redefine IGES acronym meaning Dirk J. Schroeter
226 5/2/84 226 Clarify CTYPE definition in Parametric Spline entity Saul Rothstein
227 4/30/84   Add 4 new structures per Booz-Allen report Nicholas Spewock
228 4/30/84   Revise Flag Notes entity Nicholas Spewock
229 7/31/84 222 Repairs to Network Subfigure entity Nand Flow associativity Larry O'Connell
2366/8/84298 Rewirite the View entity Thomas P.Railing
248 6/19/84 279 Add Curve on a Surface entity Emmanuel M. Tsimis
251 7/2/84 286 Add a Global value to indicate drafting standard used Klaus Troendle
252 7/2/84   Allow use of special characters within a text string Klaus Troendle
254 7/18/84 297 Add a Drawing entity Thomas P. Railing
2617/19/84228 Provide for describing curves in parametric space Thomas P. Railing
262 7/19/84 302 Clarify use of the subordinate entity switch Dwayne L. Hansen
265     Approach Angle property  
273 11/15/84 314 Add an appendix for encoding process flowsheets William G. Beazley
274 2/4/85   Add form numbers for 2-D/3-D Subfigure Definitions Dwayne L Hansen
276   404 Add form to Radius Dimension entity for two leader lines C.R. Earl
277 1/25/85 4055 Provide form numbers for General Symbol entity Scott Jorgenson
278 1/25/85   Restrict entities that may be included in the General Symbol Scott Jorgenson
279 2/12/85   Add ANSI drafting symbols to General Note entity Scott Jorgenson
284 2/11/85 406 Clarify wording for General Note text box rotation Jim Bradford
285 4/29/85 401 Add "dotted" to line font patterns Jeffrey L. Altemueller
286 7/24/86 428 Add a Data Dictionary Definition entity James A. Turner
287 7/24/86 429 Add an Attribute Table Instance entity James A. Turner
288 5/17/85   Add a General Tabular Data Definition entity James A. Turner
289 5/17/85   Add a General Tabular Data Instance entity James A. Turner
290 7/9/86   Add a Model entity to contain a classification code W.C. Burkett
299 10/16/85 315 Add a table defining permissible settings for DE Status Flags Colin Earl
309 2/4/86 408 Add constructive solid primatives Dirk J. Schroeter
314 4/29/85 407 Add OCR-B character font Jeffrey L. Altemueller
315 10/15/85 430 Add appendix example of 3-dimensional piping models Leland Frayseth
318 11/25/85   Add a network (graph) definition entity James A. Turner
319 11/25/85   Add a Tangent Enclosed Area entity James A. Turner
326 3/10/86 415 Add solid fill to Seconed Area entity Kelly Chi
343 4/28/86   Add proposed Technical Illustration subset to specification Jeff Altemueller
344 7/28/87   Add network (topology) data to proposed B-rep James A. Turner
345 4/30/86 431 Add Electrical Attributes property Larry O'Connell
347 5/2/86   Add a Swept Solid entity Dirk J. Schroeter
348 5/2/86   Add a Lofted Surface (solid) entity Dirk J. Schroeter
350 5/1/86   Clarify that the Composit Curve must reference >1 entity Goeff Parker
351 4/30/86 423 Add Fixed-Character Spacing property for General Note entity Debbie Kengott
356 7/24/86 432 Add Logical Constant data types James A. Turner
357 7/16/86 415 Deprecate Region Fill property Kelly Chi
359 7/17/86   Clarify entity 230 Geoffrey Parker
360 7/17/86   Specify magnetic tape format (from RP 6)
362 7/23/86   Replace Solids Proposal (ESP) with Brep data structure Peter R. Wilson
368 10/27/86   Add a Swept Orientable Solid entity Dirk J. Schroeter
369 7/15/86 509 Add new Sectioned Area fill patterns Kaiman Lee
370 7/28/87 530 Define code for Line Font Patterns Kaiman Lee
371 10/31/86   Add forms for text characters imbedded in Line Font Pattern James A. Turner
372 2/3/87 536 Add Brep surfaces Peter R. Wilson
379 3/11/87 511 Remove Sense Flag from Bounded Surface entity John C. Faulkner
387 7/15/87 502 Clarify defaults for pointer fields L.J. O'Connell
388 7/16/87 515 Add new elements to the FEM Topology set W.H. Gray
389 7/16/87 527 Add an independent variable to Tabular Data entity W.H. Gray
390 7/16/87 515 Create a new Units entity; delete units form FEM property W.H. Gray
391 7/22/87   Add provisions for variable pitch text fonts Fremont Tittle
395 7/14/87 546 Specify handling of null pointers in connectivity entities Bill Loye
396 7/22/87   Correct Figure 3 to match specification text Bill Loye
397 7/28/87   Remove Tabular Data and make it part of FEM Application Guide James A. Turner
400 8/4/87 651 Add Rules (e.g., design) to Attribute Table Rules to Attribute Table Bill Loye
404 10/7/87 519 Correct matrix application stated in 2.5.7 of version 4.0 James R. Bradford
405 12/10/87   Replace General Note entity with an extensible one Alan E. Dragoo
406 11/18/87 539 Correct errors in Appendix A example files Bill Hussong
408 1/7/88 603 Add Brep entities matching those defined for PDES P.R. Wilson
409 10/15/88   Add Cylinder with Canted Ends entity Pat Harrow
410 10/13/88   Add Irregular Solid entity Pat Harrow
411 10/13/88   Add a Truncated Pyramid With Canted Ends entity Pat Harrow
417 4/7/88   Views Visible with zero views Gary Willcox
418 4/7/88 521 Views Visible associativity entity counts Gary Willcox
423 8/2/88   Provide a reverse direction for a Composite Curve entity Herb Taylor
424 8/2/88   Add new form to the View entity Herb Taylor
425 8/22/88 523 Add Circuit Simulation (SPICE) parameters Larry O'Connell
442 3/27/89 542 Connect Points in Network Subfigures Marshal Giguere
450 5/22/89 571 Associativity Type/Name property William Hussong
451 6/2/89 548 Move MACRO entity to Appendix William Hussong
453 10/19/89   Piping and Ductwork Patrick Harrow
454 7/18/89 549 Placement of drafting symbols Pam Danielson
478 10/13/89 580 Subfigure Hierarchy William E. Turcotte II
483 4/17/90 612 Extended character set Christian Weidemann
485 4/26/90   Additional new External Reference form Gladys Scott
489 6/27/91 616 Continuity and degeneracy Eric Hanson
490 4/4/91   Require Subfigure Definition as base entity for Rectangular Array Mark Haines
491 4/4/91   Require Subfigure Definition as base for Circular Array Mark Haines
500     Appendix additions J. Faulkner
548 7/21/92   Clarify Plane entity usage for trimmed/bounded surface Alan Dragoo
565     Add a Piping Application Protocol Mark Palmer
569 3/29/93   Exception to matrix concatination of Phy Dep entities Eric G. Hanson
576 9/14/93   Add digital signal behavior linkage to Connect Point Larry O'Connell
591     Add parametrics Dirk Schroeter
594 1/23/96   Add 2D geometry constraints Noel Christensen
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