Dimensional Measuring Interface
Standard
Standard Improvement Request
|
SIR No. 97-59 DMIS Release 3.0 SIR Type Enhancement Severity Documentation Deficiency Status Resolved Date Submitted August 13 1997 Date Validated August 13 1997 Date In Process Date Referred Date Vote Pending Date Closed April 1 1998 Action Clarifications Submitted By Thomas Kramer NIST Room B-124, Bldg. 220 Gaithersburg MD 20899 USA Phone: (301)975-3518 Fax: (301)990-9688 kramer@cme.nist.gov |
Problem Topic
DATSET: Principle axis wording
Problem Description
Note: This is the fourth of four SIRs relating to DATSET on pages 113 and
114. I will also have several comments on DATSET on pages 17 - 19.
Page 113. In defining a coordinate system using DATSET, the principal axis may be taken to lie in exactly the same direction as that given by the datum used to specify it. The secondary axis, cannot usually lie exactly in the same direction as that given by its datum, because that datum is not exactly normal to the principal axis. Thus it is important to identify which axis is the principal axis. The documentation of DATSET fails to do this.
References
None
Related SIRs
None
Suggested Resolution
My preferred resolution is to rethink and rewrite DATSET.
To fix only this specific problem, add a new paragraph at the end of page 114 as follows:
"The principal axis of the coordinate system defined by DATSET is to be determined using the first DIR (XDIR, YDIR, etc.) mentioned in the datset."
Support Documentation
None
Resolution
Warning!!
The following statement is only a resolution to a Standard Improvement Request (SIR) and is NOT part of the current DMIS standard, nor is it guaranteed to become part of the next revision of the DMIS standard even if voted and accepted by the DMIS National Standards Committee. This resolution is tentative because it may not be incorporated into the next version of the standard, it could be changed prior to the next release, or it could be changed as the result of the "public review and comment" period required for the next version of the standard. If you choose to use this tentative resolution, you do so at your own risk since at this time it is not part of the DMIS standard.
Attachments
None
Notes
None