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<h4><b>Latest released version</b>: CF 1.12 (December 2024)</h4>
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<h4>CF 1.11 (December 2023)</h4>
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<h4>CF 1.10 (August 2022)</h4>
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<h4>CF 1.9 (September 2021)</h4>
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<h4>CF 1.8 (February 2020)</h4>
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<h4>CF 1.7 (August 2017)</h4>
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<h4>CF 1.7.2 (obsolete)</h4>
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<h4>CF 1.6 (December 2011)</h4>
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<h4>CF 1.5 (October 2010)</h4>
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<h4>CF 1.4 (February 2009)</h4>
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<h4>CF 1.3 (November 2008)</h4>
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<h4>CF 1.2 (May 2008)</h4>
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<h4>CF 1.1 (January 2008)</h4>
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<h4>CF 1.0 (October 2003 with revisions until March 2006)</h4>
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</p>
<h2><a href="./conventions_contributors.html">List of contributors</a> to CF conventions</h2>
<h2>Compliance checker</h2>
<a href="https://cfchecker.ncas.ac.uk">This utility</a> checks that a netCDF file which you supply complies with the CF conformance requirements and recommendations.
<h2>Conformance</h2>
Each version of the CF conventions document is accompanied by a conformance document which lists the requirements and recommendations that could be verified by the compliance checker or any program with a similar aim. For any <em>recommendation</em> which is not followed, the checker gives a warning; for any <em>requirement</em> which is not met, it reports an error.
<p><ul>
<li>1.13-draft: <a href="http://cfconventions.org/cf-conventions/conformance.pdf">PDF</a> <a href="http://cfconventions.org/cf-conventions/conformance.html">HTML</a></li>
<li>1.12: <a href="Data/cf-documents/requirements-recommendations/conformance-1.12.pdf">PDF</a> <a href="Data/cf-documents/requirements-recommendations/conformance-1.12.html">HTML</a></li>
<li>1.11: <a href="Data/cf-documents/requirements-recommendations/conformance-1.11.pdf">PDF</a> <a href="Data/cf-documents/requirements-recommendations/conformance-1.11.html">HTML</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/conformance-1.10.html">1.10</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/conformance-1.9.html">1.9</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/conformance-1.8.html">1.8</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/requirements-recommendations-1.7.html">1.7</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/requirements-recommendations-1.6.html">1.6</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/requirements-recommendations-1.5.html">1.5</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/requirements-recommendations-1.4.html">1.4</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/requirements-recommendations-1.3.html">1.3</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/requirements-recommendations-1.2.html">1.2</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/requirements-recommendations-1.1.html">1.1</a></li>
<li><a href="Data/cf-documents/requirements-recommendations/requirements-recommendations-1.0.html">1.0</a></li>
</ul></p>
<h2><a href="wkt-proj-4.html">CF Grid Mapping ⇌ CRS WKT</a></h2>
<h2>Conventions preceding CF 1.0</h2>
The development of the CF convention built upon three earlier netCDF conventions: <a href="https://ferret.pmel.noaa.gov/Ferret/documentation/coards-netcdf-conventions">COARDS</a>, NCAR CSM and <a href="GDT">GDT</a>, as well as the NetCDF User Guide. Development of CF began in 1999, and there were several <a href="CF-beta">beta versions of CF</a> before 1.0.