% This is supposed to be the ACM 2012 subject classification system.
% Supposed to include
% \documentclass{sig-alternate-05-2015}
%
% But it does not work:
% https://academia.stackexchange.com/questions/15252/is-the-new-acm-2012-taxonomy-usable-in-use
% Get a 404 not found for the LaTeX class defintion:
% http://www.acm.org/publications/article-templates/sig-alternate-05-2015.cls
%
\begin{CCSXML}
<ccs2012>
<concept>
<concept_id>10002951</concept_id>
<concept_desc>Information systems</concept_desc>
<concept_significance>500</concept_significance>
</concept>
<concept>
<concept_id>10002951.10003152.10003161.10003434.10003438</concept_id>
<concept_desc>Information systems~Hybrid storage layouts</concept_desc>
<concept_significance>500</concept_significance>
</concept>
<concept>
<concept_id>10002951.10003317.10003325.10003326</concept_id>
<concept_desc>Information systems~Query representation</concept_desc>
<concept_significance>500</concept_significance>
</concept>
<concept>
<concept_id>10003752.10003809.10003635</concept_id>
<concept_desc>Theory of computation~Graph algorithms analysis</concept_desc>
<concept_significance>500</concept_significance>
</concept>
<concept>
<concept_id>10003752.10003809.10010031.10010032</concept_id>
<concept_desc>Theory of computation~Pattern matching</concept_desc>
<concept_significance>500</concept_significance>
</concept>
<concept>
<concept_id>10003752.10003809.10010031.10010033</concept_id>
<concept_desc>Theory of computation~Sorting and searching</concept_desc>
<concept_significance>500</concept_significance>
</concept>
</ccs2012>
\end{CCSXML}
\ccsdesc[500]{Information systems}
\ccsdesc[500]{Information systems~Hybrid storage layouts}
\ccsdesc[500]{Information systems~Query representation}
\ccsdesc[500]{Theory of computation~Graph algorithms analysis}
\ccsdesc[500]{Theory of computation~Pattern matching}
\ccsdesc[500]{Theory of computation~Sorting and searching}
%%% \printccsdesc