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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (Windows NT 5.0; U) [Netscape]">
<title>CFD General Notation System</title>
</head>
<body text="#000000" bgcolor="#FFFFFF">
<table BORDER=0 CELLSPACING=5 CELLPADDING=5 WIDTH="100%" >
<tr>
<td WIDTH="180"><a href="http://www.cgns.org/"><img SRC="cgns.gif" ALT="CGNS logo" BORDER=0 height=111 width=180 align=CENTER></a></td>
<td ALIGN=CENTER>
<h1>
<font color="#000000">CFD General Notation System<br>
Extensions</font></h1>
</td>
</tr>
<tr>
<td COLSPAN="2">
<hr></td>
<td> </td>
</tr>
<tr>
<td VALIGN=TOP WIDTH="180">
<table BORDER CELLSPACING=0 CELLPADDING=5 WIDTH="100%" >
<tr>
<td VALIGN=TOP>
<p><b>CGNS site pages</b>
<br><a href="index.html">CGNS Home</a>
<br><a href="WhatIsCGNS.html">What is CGNS?</a>
<br><a href="starting.html">Getting Started</a>
<br><a href="news.html">Latest News</a>
<br><a href="hdf5.html">Switch to HDF5</a>
<br><a href="steering.html">Steering Committee</a>
<br><a href="Implementations.html">Implementations</a>
<br><a href="CGNStalk.html">Discussion Group</a>
<br><a href="download.html">Download</a>
<br><a href="Utilities.html">Contributed Utilities</a>
<br><a href="CGNSFiles.html">Example CGNS Files</a>
<br><b><font color=red>Proposed Extensions</font></b>
<br><a href="FAQs.html">FAQs</a>
<p><b>Documentation pages</b>
<br><a href="CGNS_docs_current/index.html">Documentation Home</a>
<br><a href="CGNS_docs_current/index.html#Papers">Papers and Slides</a>
<br><a href="CGNS_docs_current/index.html#Minutes">Meeting Minutes</a>
<br><a href="CGNS_docs_current/user/index.html">User's Guide</a>
<br><a href="CGNS_docs_current/overview/index.html">Overview</a>
<br><a href="CGNS_docs_current/sids/index.html">SIDS</a>
<br><a href="CGNS_docs_current/filemap/index.html">SIDS File Mapping</a>
<br><a href="CGNS_docs_current/midlevel/index.html">Mid-Level Library</a>
<br><a href="CGNS_docs_current/cgio/index.html">CGIO User's Guide</a>
</td>
</tr>
</table>
</td>
<td VALIGN=TOP>
<h2>
CGNS Proposals for Extension (CPEX)</h2>
<p>
The CPEX is a design document or documents that describe a new feature for
CGNS. The CPEX should provide a concise technical specification of the
feature and a rationale for the feature.
The CPEX is intended to be the primary mechanism for proposing new features and for collecting community input
on an issue. The CPEX author is responsible for building consensus within the community and
documenting dissenting opinions.
<p>The CPEX editors assign CPEX numbers and change their status. All CPEX-related email should be
sent to
<a href="mailto:[email protected]">[email protected]</a>.
Each CPEX must have a champion - someone who writes the CPEX, shepherds the discussions,
and attempts to build community consensus around the idea. The CPEX champion must
first try to determine if their idea is appropriate for a CPEX. (Small enhancements or patches may not
need a CPEX.) If a CPEX is appropriate, the champion must write a proposal, following the guidelines
below. A CPEX number is then assigned. This is typically followed by a period
of discussion, comments, input, and consensus-building, as well as an in-depth critical review.
The CGNS Steering Committee ultimately votes for or against adoption.
<p>The proposals listed in the table
below that were "not accepted" never made it to implementation, possibly because of lack of unified
support, incomplete details, lack of champion involvement in the process, or because they were not
generalizable to a wide enough class of problems.
It is possible to resurrect and/or revise and resubmit older proposals.
Some additional guidelines
regarding changes or additions to the CGNS standard can be found in the
<a href="CGNS_docs_current/charter/principles.html">CGNS Steering Committee Charter</a>.
<p>The CPEX should include the following information:
<ul>
<li>Name(s) and organization(s) of proposer(s)</li>
<li>E-mail contact information</li>
<li>General description of extension</li>
<li>Reason or need for extension</li>
<li>Detailed description of extension using similar documentation style found in the SIDS
(LaTeX files for the SIDS are available from the Documentation Home Page -
look for "LaTeX Source")</li>
<li>File Mapping description of Node Attributes, following the prescription given in existing
<a href="CGNS_docs_current/filemap/nodes.html">Node Description Documentation</a></li>
<li>Specific example(s) of extension</li>
</ul>
<p>In the table below, note that it is possible for a feature to be implemented in the SIDS and
Filemap documentation, but not yet be implemented in the MLL software. If/when this occurs, it means
that an "official" CGNS file can still be constructed with this feature, but the user must make use
of means other than the MLL to accomplish it.
<p>A primary requirement of all proposals for modifications will be to support and
maintain code compatibility. No additions or changes to the CGNS standard will be adopted - without
overwhelmingly compelling reasons - which
invalidate existing software or data.</p>
<p>Note that the above CPEX work flow and requirements are new as of 09/2009, so older proposals given
in the table below may be missing some of the required information.
<p><b>Comments on proposals should be sent to
<a href="mailto:[email protected]">[email protected]</a>.</b>
<br>
<br>
<br>
</tr>
<left><table BORDER=2 CELLSPACING=0 CELLPADDING=5 NOSAVE >
<tr>
<th BGCOLOR="#CCCCCC" NOSAVE>CPEX #</th>
<th BGCOLOR="#CCCCCC" NOSAVE>Scope</th>
<th BGCOLOR="#CCCCCC" NOSAVE>Documentation</th>
<th BGCOLOR="#CCCCCC" NOSAVE>Date first posted</th>
<th BGCOLOR="#CCCCCC" NOSAVE>Date of last revision</th>
<th BGCOLOR="#CCCCCC" NOSAVE>
<a href="CGNS_docs_current/sids/index.html">SIDS</a> status</th>
<th BGCOLOR="#CCCCCC" NOSAVE>
<a href="CGNS_docs_current/filemap/index.html">Filemap</a> status</th>
<th BGCOLOR="#CCCCCC" NOSAVE>
<a href="CGNS_docs_current/midlevel/index.html">MLL</a> status</th>
</tr>
<tr>
<td>0046</td>
<td>Particle Data</td>
<td><a href="ProposedExtensions/CPEX0046_particles_v1.pdf">
CPEX0046_particles_v1.pdf</a><br>
<td>Mar.26.19</td>
<td>Mar.26.19</td>
<td>under review</td>
<td>under review</td>
<td>under review</td>
</tr>
<tr>
<td>0045</td>
<td>Polynomial Data and Curved Grid Elements</td>
<td><a href="ProposedExtensions/CPEX0045_HighOrder_v2.pdf">
CPEX0045_HighOrder_v2.pdf</a><br>
<td>Mar.26.19</td>
<td>Jun.25.19</td>
<td><font color=blue>accepted; awaiting implementation</font></td>
<td><font color=blue>accepted; awaiting implementation</font></td>
<td><font color=blue>accepted; awaiting implementation</font></td>
</tr>
<tr>
<td>0044</td>
<td>Encoding Functions</td>
<td><a href="ProposedExtensions/CPEX0044_functions_v1.pdf">
CPEX0044_functions_v1.pdf</a><br>
<td>Mar.26.19</td>
<td>Mar.28.19</td>
<td>under review</td>
<td>under review</td>
<td>under review</td>
</tr>
<tr>
<td>0043</td>
<td>Family Hierarchy as a Tree</td>
<td><a href="ProposedExtensions/CPEX-0043-familytrees-v2.pdf">
CPEX-0043-familytrees-v2.pdf</a><br>
<td>Nov.06.18</td>
<td>Jun.13.19</td>
<td><font color=blue>implemented version 4.1</font></td>
<td><font color=blue>implemented version 4.1</font></td>
<td><font color=blue>implemented version 4.1</font></td>
</tr>
<tr>
<td>0042</td>
<td>Storing the Bounding Box of a Grid</td>
<td><a href="ProposedExtensions/CPEX-0042-boundingbox-v2.pdf">
CPEX-0042-boundingbox-v2.pdf</a><br>
<td>Nov.06.18</td>
<td>May.29.19</td>
<td><font color=blue>implemented version 4.1</font></td>
<td><font color=blue>implemented version 4.1</font></td>
<td><font color=blue>implemented version 4.1</font></td>
</tr>
<tr>
<td>0041</td>
<td>NGON Modification Proposals</td>
<td><a href="ProposedExtensions/NGON-CPEX-0041-v0.16.pdf">
NGON-CPEX-0041-v0.16.pdf</a><br>
<td>May.05.17</td>
<td>Sep.15.17</td>
<td><font color=green>implemented Version 4.O</font></td>
<td><font color=green>implemented Version 4.0</font></td>
<td><font color=green>implemented Version 4.0</font></td>
</tr>
<tr>
<td>0040</td>
<td>Rind Plane Indexing</td>
<td><a href="ProposedExtensions/rind_plane_indexing_5_14_2015.pdf">
rind_plane_indexing_5_14_2015.pdf</a><br>
<td>May.05.14</td>
<td>May.14.15</td>
<td><font color=green>implemented Version 3.4</font></td>
<td>no change required</td>
<td><font color=green>implemented Version 3.4</font></td>
</tr>
<tr>
<td>0039</td>
<td>Inter-Base Reference Extension</td>
<td><a href="ProposedExtensions/CGNS-0039-Inter-Base-References1.pdf">
CGNS-0039-Inter-Base-References1.pdf</a><br>
<td>Jan.31.14</td>
<td>Jan.31.14</td>
<td><font color=green>implemented Version 3.3</font></td>
<td><font color=green>no change required</font></td>
<td><font color=green>implemented Version 3.3</font></td>
</tr>
<tr>
<td>0038</td>
<td>Quartic Elements for High Order</td>
<td><a href="ProposedExtensions/CGNS_P4_elem_defn2.pdf">
CGNS_P4_elem_defn2.pdf (rev)</a><br>
<a href="ProposedExtensions/CGNS_P4_elem_defn1.pdf">
CGNS_P4_elem_defn1.pdf (old)</a></td>
<td>Jan.07.14</td>
<td>Jan.10.14</td>
<td><font color=green>implemented Version 3.3</font></td>
<td><font color=green>no change required</font></td>
<td><font color=green>implemented Version 3.3</font></td>
</tr>
<tr>
<td>0037</td>
<td>Improvements for Multiblock Unstructured</td>
<td><a href="ProposedExtensions/README.improv_mblk_uns.txt">README.improv_mblk_uns.txt</a><br>
<a href="ProposedExtensions/CGNS-MultiBlockUnst.pdf">CGNS-MultiBlockUnst.pdf</a><br>
<a href="ProposedExtensions/bump_3df_unstr_native_pw.cgns">bump_3df_unstr_native_pw.cgns</a><br>
<a href="ProposedExtensions/bump_3df_unstr.cgns">bump_3df_unstr.cgns</a><br>
<a href="ProposedExtensions/bump_3df_hybrid.cgns">bump_3df_hybrid.cgns</a>
</td>
<td>Aug.08.13</td>
<td>Sep.10.13</td>
<td><font color=black>current version not accepted</font></td>
<td><font color=black>N/A</font></td>
<td><font color=black>N/A</font></td>
</tr>
<tr>
<td>0036</td>
<td>Cubic Elements for High Order</td>
<td><a href="ProposedExtensions/CGNS_extended_elem_defn2.pdf">
CGNS_extended_elem_defn2.pdf</a></td>
<td>Nov.05.12</td>
<td>Nov.13.12</td>
<td><font color=green>implemented Version 3.2</font></td>
<td><font color=green>no change required</font></td>
<td><font color=green>implemented Version 3.2</font></td>
</tr>
<tr>
<td>0035</td>
<td>Rigid Motion in a Family (requires CPEX #0034)</td>
<td><a href="ProposedExtensions/CGNS-prop-ext-FamilyRigidMotion-5.pdf">CGNS-prop-ext-FamilyRigidMotion-5.pdf</a></td>
<td>Feb.07.11</td>
<td>Feb.07.11</td>
<td><font color=black>current version not accepted</font></td>
<td><font color=black>N/A</font></td>
<td><font color=black>N/A</font></td>
</tr>
<tr>
<td>0034</td>
<td>Multiple Families</td>
<td><a href="ProposedExtensions/CGNS-0034-6.pdf">CGNS-0034-6.pdf</a><br>
(Note: AdditionalFamilyName
also to be added under UserDefinedData)</td>
<td>Feb.03.11</td>
<td>Nov.16.11</td>
<td><font color=green>implemented Version 3.2</font></td>
<td><font color=green>implemented Version 3.2</font></td>
<td><font color=green>implemented Version 3.2</font></td>
</tr>
<tr>
<td>0033</td>
<td>Hierarchy of Families</td>
<td><a href="ProposedExtensions/CGNS-0033-6.pdf">CGNS-0033-6.pdf</a></td>
<td>Feb.03.11</td>
<td>Nov.16.11</td>
<td><font color=green>implemented Version 3.2</font></td>
<td><font color=green>implemented Version 3.2</font></td>
<td><font color=green>implemented Version 3.2</font></td>
</tr>
<tr>
<td>0032</td>
<td>Rigid Motion Improvement</td>
<td><a href="ProposedExtensions/CGNS-prop-ext-FamilyRigidMotionIterativeData.pdf">IterativeData.pdf</a></br>
<a href="ProposedExtensions/CGNS-prop-ext-FrameReference.pdf">FrameReference.pdf</a></br>
<a href="ProposedExtensions/CGNS-prop-ext-FamilyRigidMotion-3.pdf">FamilyRigidMotion.pdf (mod)</a></br>
<a href="ProposedExtensions/CGNS-prop-ext-FamilyRigidMotion.pdf">FamilyRigidMotion.pdf (old)</a></br>
<a href="ProposedExtensions/CGNS-prop-ext-RigidMotion.pdf">RigidMotion.pdf</a></td>
<td>Jul.01.08</td>
<td>Oct.07.08</td>
<td>withdrawn</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0031</td>
<td>General SIDS Improvement*</td>
<td><a href="ProposedExtensions/intro_parts_of_sids2.pdf">intro_parts_of_sids.pdf (mod)</a></br>
<a href="ProposedExtensions/intro_parts_of_sids.pdf">intro_parts_of_sids.pdf (old)</a></br>
<a href="ProposedExtensions/parts_of_sids.pdf">parts_of_sids.pdf</a></td>
<td>Jun.09.08</td>
<td>Jun.09.08</td>
<td><font color=green>implemented Version 3.1.3</font></td>
<td><font color=green>implemented Version 3.1.3</font></td>
<td><font color=green>implemented Version 3.1.3</font></td>
</tr>
<tr>
<td>0030</td>
<td>Regions</td>
<td><a href="ProposedExtensions/RegionsX.pdf">Regions.pdf (mod)</a></br>
<a href="ProposedExtensions/RegionsIX.pdf">Regions.pdf (old)</a></br>
<a href="ProposedExtensions/RegionsIX_filemap.pdf">Regions_filemap.pdf</a></td>
<td>Nov.09.06</td>
<td>May.29.11</td>
<td><font color=green>implemented Version 3.1.3</font></td>
<td><font color=green>implemented Version 3.1.3</font></td>
<td><font color=green>implemented Version 3.1.3</font></td>
</tr>
<tr>
<td>0029</td>
<td>Interface Connectivity</td>
<td><a href="ProposedExtensions/InterpolantDonor.pdf">InterpolantDonor.pdf</a></td>
<td>Apr.13.07</td>
<td>May.22.07</td>
<td><font color=green>implemented Version 2.5</font></td>
<td><font color=green>implemented Version 2.5</font></td>
<td><font color=green>implemented Version 2.5</font></td>
</tr>
<tr>
<td>0028</td>
<td>Face-Based Storage</td>
<td><a href="ProposedExtensions/FacebasedIntro.pdf">FacebasedIntro.pdf</a></br>
<a href="ProposedExtensions/FacebasedSIDS.pdf">FacebasedSIDS.pdf</a></td>
<td>Nov.09.06</td>
<td>Nov.09.06</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
<tr>
<td>0027</td>
<td>Multiple Zone Connectivities for Time-Dependent</td>
<td><a href="ProposedExtensions/Timedepconn.pdf">Timedepconn.pdf</a></br>
<a href="ProposedExtensions/Timedepconn_filemap.pdf">Timedepconn_filemap.pdf</a></td>
<td>Mar.08.06</td>
<td>Mar.08.06</td>
<td><font color=green>implemented Version 3.1.3</font></td>
<td><font color=green>implemented Version 3.1.3</font></td>
<td><font color=green>implemented Version 3.1.3</font></td>
</tr>
<tr>
<td>0026</td>
<td>Face Center Connectivity</td>
<td><a href="ProposedExtensions/Facecenter.pdf">Facecenter.pdf</a></td>
<td>Mar.08.06</td>
<td>Mar.08.06</td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
</tr>
<tr>
<td>0025</td>
<td>Averaging Interfaces</td>
<td><a href="ProposedExtensions/AveragingInterfaces.pdf">AveragingInterfaces.pdf</a></td>
<td>Mar.08.06</td>
<td>Mar.08.06</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0024</td>
<td>FSI with Deformable Boundaries</td>
<td><a href="ProposedExtensions/FSIDeformableBdy.pdf">FSIDeformableBdy.pdf</a></td>
<td>Mar.28.06</td>
<td>Mar.28.06</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0023</td>
<td>Rind Data for Unstructured Zones</td>
<td><a href="ProposedExtensions/UnstructuredRind.pdf">UnstructuredRind.pdf</a></td>
<td>Dec.17.03</td>
<td>Dec.17.03</td>
<td><font color=green>implemented Version 2.4.3</font></td>
<td><font color=green>implemented Version 2.4.3</font></td>
<td><font color=green>implemented Version 2.4.3</font></td>
</tr>
<tr>
<td>0022</td>
<td>Partial Connectivity Read/Write</td>
<td><a href="ProposedExtensions/PartialConn.pdf">PartialConn.pdf</a></td>
<td>Dec.10.03</td>
<td>Dec.15.03</td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
</tr>
<tr>
<td>0021</td>
<td>Connectivity Property</td>
<td><a href="ProposedExtensions/GridConnectivityProperty.pdf">GridConnectivityProperty.pdf</a></td>
<td>Sep.25.03</td>
<td>Sep.25.03</td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
</tr>
<tr>
<td>0020</td>
<td>FamilyBC Extension</td>
<td><a href="ProposedExtensions/FamilyBCExtension.pdf">FamilyBCExtension.pdf</a></td>
<td>Sep.25.03</td>
<td>Sep.25.03</td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
</tr>
<tr>
<td>0019</td>
<td>UserDefined data Extension</td>
<td><a href="ProposedExtensions/UserDefinedExtensions.pdf">UserDefinedExtensions.pdf</a></td>
<td>Apr.21.03</td>
<td>Apr.21.03</td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
</tr>
<tr>
<td>0018</td>
<td>BCDataSet Extension</td>
<td><a href="ProposedExtensions/BCDataSetExtensions.pdf">BCDataSetExtensions.pdf</a></td>
<td>Apr.21.03</td>
<td>Apr.21.03</td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
</tr>
<tr>
<td>0017</td>
<td>Chemical Species</td>
<td><a href="ProposedExtensions/ChemicalSpecies.pdf">ChemicalSpecies.pdf</a></td>
<td>Oct.25.02</td>
<td>Oct.25.02</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0016</td>
<td>Element Regions</td>
<td><a href="ProposedExtensions/ElementRegions.pdf">ElementRegions.pdf</a></td>
<td>Oct.25.02</td>
<td>Oct.25.02</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0015</td>
<td>Elemental Components</td>
<td><a href="ProposedExtensions/ElementalComponents.pdf">ElementalComponents.pdf</a></td>
<td>Oct.25.02</td>
<td>Oct.25.02</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0014</td>
<td>Boundary Type Extensions</td>
<td><a href="ProposedExtensions/BCTypeExtensions.pdf">BCTypeExtensions.pdf</a></td>
<td>Oct.25.02</td>
<td>Oct.25.02</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0013</td>
<td>Solution BC proposal</td>
<td><a href="ProposedExtensions/SolutionBCproposal.pdf">SolutionBCproposal.pdf</a></td>
<td>Jul.03.02</td>
<td>Jul.03.02</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0012</td>
<td>Electromagnetic proposal</td>
<td><a href="ProposedExtensions/EMproposals.pdf">EMproposals.pdf</a></td>
<td>Jul.03.02</td>
<td>Jul.03.02</td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
<td><font color=green>implemented Version 2.4</font></td>
</tr>
<tr>
<td>0011</td>
<td>Wall Function, Periodic, Rotor/Stator</td>
<td><a href="ProposedExtensions/WallPeriodicRS.pdf">WallPeriodicRS.pdf</a></td>
<td>Jul.01.02</td>
<td>Jul.31.02</td>
<td><font color=green>implemented Version 2.2</font></td>
<td><font color=green>implemented Version 2.2</font></td>
<td><font color=green>implemented Version 2.2</font></td>
</tr>
<tr>
<td>0010</td>
<td>Multi-Phase / Liquid Spray</td>
<td><a href="ProposedExtensions/MultiPhaseExtension.pdf">MultiPhaseExtension.pdf</a></td>
<td>Dec.14.00</td>
<td>Dec.01.00</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0009</td>
<td>User Defined Data Arrays</td>
<td><a href="ProposedExtensions/UserDefinedDataArrays.html">UserDefinedDataArrays.html</a>
<br><a href="ProposedExtensions/UserDefinedDataArrays2.html">AlternateProposal.html</a></td>
<td>Nov.15.00
<br>Feb.02.01</td>
<td>Nov.15.00
<br>Feb.02.01</td>
<td><font color=green>implemented Version 2.1</font></td>
<td><font color=green>implemented Version 2.1</font></td>
<td><font color=green>implemented Version 2.1</font></td>
</tr>
<tr>
<td>0008</td>
<td>Hierarchical Elements</td>
<td><a href="ProposedExtensions/HierarchicalElements.pdf">HierarchicalElements.pdf</a>
<br>Response from M.Aftosmis: <a href="ProposedExtensions/HierarchicalResponse.pdf">hierarchicalResponse.pdf</a></td>
<td>Aug.02.00
<br>Dec.01.00</td>
<td>Aug.02.00
<br>Dec.01.00</td>
<td>not accepted</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>0007</td>
<td>Gravity</td>
<td><a href="ProposedExtensions/Gravity.pdf">Gravity.pdf</a></td>
<td>Aug.04.99</td>
<td>Mar.15.00</td>
<td><font color=green>implemented Version 2.2</font></td>
<td><font color=green>implemented Version 2.2</font></td>
<td><font color=green>implemented Version 2.2</font></td>
</tr>
<tr>
<td>0006</td>
<td>Rotating Coordinates</td>
<td><a href="ProposedExtensions/RotatingCoordinates.pdf">RotatingCoordinates.pdf</a></td>
<td>Aug.04.99</td>
<td>Dec.09.99</td>
<td><font color=green>implemented Version 2.2</font></td>
<td><font color=green>implemented Version 2.2</font></td>
<td><font color=green>implemented Version 2.2</font></td>
</tr>
<tr>
<td>0005</td>
<td>Axisymmetry for 2D grids</td>
<td><a href="ProposedExtensions/axisymmetry.pdf">axisymmetry.pdf</a></td>
<td>Aug.04.99</td>
<td>Mar.15.00</td>
<td><font color=green>implemented Version 2.2</font></td>
<td><font color=green>implemented Version 2.2</font></td>
<td><font color=green>implemented Version 2.2</font></td>
</tr>
<tr>
<td>0004</td>
<td>Chemical Species</td>
<td><a href="ProposedExtensions/Chemistry.pdf">Chemistry.pdf</a></td>
<td>Aug.04.99</td>
<td>Sep.15.00</td>
<td><font color=green>implemented Version 2.1</font></td>
<td><font color=green>implemented Version 2.1</font></td>
<td><font color=green>implemented Version 2.1</font></td>
</tr>
<tr>
<td>0003</td>
<td>Iterative or Time-accurate data</td>
<td><a href="ProposedExtensions/IterativeOrTemp.pdf">IterativeOrTemp.pdf</a></td>
<td>Aug.04.99</td>
<td>Mar.14.00</td>
<td><font color=green>implemented</font></td>
<td><font color=green>implemented</font></td>
<td><font color=green>implemented</font></td>
</tr>
<tr>
<td>0002</td>
<td>Point by Point Grid Motion</td>
<td><a href="ProposedExtensions/ArbitraryGridMotion.pdf">ArbitraryGridMotion.pdf</a>
<br> <a href="ProposedExtensions/Example_Motion.pdf">see example 1</a></td>
<td>Aug.04.99</td>
<td>Mar.14.00</td>
<td><font color=green>implemented</font></td>
<td><font color=green>implemented</font></td>
<td><font color=green>implemented</font></td>
</tr>
<tr>
<td>0001</td>
<td>Rigid Body Grid Motion</td>
<td><a href="ProposedExtensions/RigidGridMotion.pdf">RigidGridMotion.pdf</a>
<br> <a href="ProposedExtensions/Example_Motion.pdf">see example 1</a></td>
<td>Aug.04.99</td>
<td>Mar.14.00</td>
<td><font color=green>implemented</font></td>
<td><font color=green>implemented</font></td>
<td><font color=green>implemented</font></td>
</tr>
</table></left>
</td>
</tr>
</table>
<p>* For CPEX #0031, it should be noted that some aspects require significant modifications on
the part of the MLL. For example, the improvement replaces the use of ElementRange and
ElementList with PointRange and PointList. The methodology for accomplishing this while
maintaining compatibility with existing CGNS files and CGNS codes must be carefully
considered prior to implementation. I.e., either the MLL must still be able to recognize, read, and
translate ElementRange etc, or else ElementRange etc must still be allowed as an option
(in the documentation). Therefore, this CPEX will not be added to the SIDS or Filemap documents
until full implementation in the MLL is possible.
<br>
<p>(Note that the CPEX is loosely patterned after the
<a href="http://www.python.org/dev/peps/pep-0001/">Python-based PEP (Python Enhancement Proposal)</a>.
We gratefully acknowledge their well-documented methodology.)
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