acmart (12nov18)

git-svn-id: svn://tug.org/texlive/trunk@49137 c570f23f-e606-0410-a88d-b1316a301751

21 files changed, 235 insertions, 45 deletions

diff --git a/Master/texmf-dist/bibtex/bst/acmart/ACM-Reference-Format.bst b/Master/texmf-dist/bibtex/bst/acmart/ACM-Reference-Format.bst
index d65cd699aeb..5a7f2428434 100644
--- a/Master/texmf-dist/bibtex/bst/acmart/ACM-Reference-Format.bst
+++ b/Master/texmf-dist/bibtex/bst/acmart/ACM-Reference-Format.bst
@@ -506,15 +506,14 @@ FUNCTION { strip.doi } % UTAH
   % result on the output stack, as recommended by CrossRef DOI
   % documentation.
   % For example, reduce "http://doi.acm.org/10.1145/1534530.1534545" to
-  % "10.1145/1534530.1534545".  That is later typeset and displayed as
-  % doi:10.1145/1534530.1534545 as the LAST item in the reference list
-  % entry.  Publisher Web sites wrap this with a suitable link to a real
-  % URL to resolve the DOI, and the master https://doi.org/ address is
-  % preferred, since publisher-specific URLs can disappear in response
-  % to economic events.  All journals are encouraged by the DOI
-  % authorities to use that typeset format and link procedures for
-  % uniformity across all publications that include DOIs in reference
-  % lists.
+  % "10.1145/1534530.1534545".  A suitable URL is later typeset and
+  % displayed as the LAST item in the reference list entry.  Publisher Web
+  % sites wrap this with a suitable link to a real URL to resolve the DOI,
+  % and the master https://doi.org/ address is preferred, since publisher-
+  % specific URLs can disappear in response to economic events.  All
+  % journals are encouraged by the DOI authorities to use that typeset
+  % format and link procedures for uniformity across all publications that
+  % include DOIs in reference lists.
   % The numeric prefix is guaranteed to start with "10.", so we use
   % that as a test.
   % 2017-02-04 Added stripping of https:// (Boris)
diff --git a/Master/texmf-dist/doc/latex/acmart/README b/Master/texmf-dist/doc/latex/acmart/README
index 266692d80f4..28dce47b32b 100644
--- a/Master/texmf-dist/doc/latex/acmart/README
+++ b/Master/texmf-dist/doc/latex/acmart/README
@@ -198,5 +198,11 @@ Version 1.54    New option: 'noacm' (Gabriel Scherer)
 
 Version 1.55    Bug fixes
 		Font changes for SIGCHI table captions
-		
 
+
+Version 1.56    Bug fixes
+		Added \flushbottom to two column formats (Philip Quinn)
+		The final punctuation for the list of concepts
+		is now period instead of semilcolon (Philip Quinn)
+		New command \Description to describe images for visually
+		impaired users.
diff --git a/Master/texmf-dist/doc/latex/acmart/acmart.pdf b/Master/texmf-dist/doc/latex/acmart/acmart.pdf
index ba44884ec6b..2e2553eb49f 100644
--- a/Master/texmf-dist/doc/latex/acmart/acmart.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/acmart.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/acmguide.pdf b/Master/texmf-dist/doc/latex/acmart/acmguide.pdf
index 281b8f0aa71..4483853f74a 100644
--- a/Master/texmf-dist/doc/latex/acmart/acmguide.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/acmguide.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-acmlarge.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-acmlarge.pdf
index a4aa287bcc5..b058486f86a 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-acmlarge.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-acmlarge.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-acmsmall.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-acmsmall.pdf
index 1b2eb69b5e2..77ea06a9777 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-acmsmall.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-acmsmall.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-acmtog.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-acmtog.pdf
index 76ab01caf20..8974be769da 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-acmtog.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-acmtog.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-manuscript.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-manuscript.pdf
index dfa6cd9a857..29bbbeb228f 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-manuscript.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-manuscript.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi-a.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi-a.pdf
index 1763e4628fd..1df335ae14c 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi-a.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi-a.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi-a.tex b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi-a.tex
index 51693691df6..bd2e12dbfcd 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi-a.tex
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi-a.tex
@@ -155,7 +155,8 @@
 \end{sidebar}
 
 \begin{figure}
-  \includegraphics[width=\marginparwidth]{sigchi-logo}
+  \includegraphics[width=\marginparwidth]{sigchi-logo}\Description{SIGCHI
+    logo} 
   \caption{Insert a caption below each figure.}
   \label{fig:sample}
 \end{figure}
@@ -272,7 +273,8 @@ pay attention to the following:
 
 
 \begin{marginfigure}
-    \includegraphics[width=\marginparwidth]{cats}
+    \includegraphics[width=\marginparwidth]{cats}\Description{An image
+      of tesselated cats}
     \caption{In this image, the cats are tessellated within a square
       frame. Images should also have captions and be within the
       boundaries of the sidebar on page~\pageref{bar:sidebar}. Photo:
@@ -289,13 +291,13 @@ figures must be usable when printed in black and white. You can use
 the \texttt{marginfigure} environment to insert figures in the (left) margin
 of the document (see Figure~\ref{fig:marginfig}). Finally, be sure to
 make images large enough so the important details are legible and
-clear (see Figure~\ref{fig:cats}).
+clear (see Figure~\ref{fig:map}).
 
 \begin{figure*}
-  \includegraphics[width=\fulltextwidth]{map}
+  \includegraphics[width=\fulltextwidth]{map}\Description{A world map}
   \caption{In this image, the map maximizes use of space.
     Note that \LaTeX\ tends to render large figures on a
-    dedicated page. Image: \ccbynd~ayman on Flickr.}~\label{fig:cats}
+    dedicated page. Image: \ccbynd~ayman on Flickr.}~\label{fig:map}
 \end{figure*}
 
 
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi.pdf
index cec0e546b6c..3bd78d48146 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi.tex b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi.tex
index 0fbe326b8e0..0b55897480b 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi.tex
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigchi.tex
@@ -158,7 +158,8 @@ ACM SIG Proceedings.
 \keywords{ACM proceedings, \LaTeX, text tagging}
 
 \begin{teaserfigure}
-  \includegraphics[width=\textwidth]{sampleteaser}
+  \includegraphics[width=\textwidth]{sampleteaser}\Description{A
+    baseball field}
   \caption{This is a teaser}
   \label{fig:teaser}
 \end{teaserfigure}
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf-authordraft.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf-authordraft.pdf
index d1c92f011d9..ea8b345d1c9 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf-authordraft.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf-authordraft.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf-xelatex.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf-xelatex.pdf
index cd78b9be6b5..44a4d008b7a 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf-xelatex.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf-xelatex.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf.pdf
index 932e286b09f..c02e1ea194a 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigconf.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigplan.pdf b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigplan.pdf
index 12cd38a1a87..1bf2d1f97fd 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigplan.pdf
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigplan.pdf
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigplan.tex b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigplan.tex
index 10f791d2e23..7688fcad9d4 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/sample-sigplan.tex
+++ b/Master/texmf-dist/doc/latex/acmart/samples/sample-sigplan.tex
@@ -165,7 +165,8 @@ ACM SIG Proceedings.
 \keywords{ACM proceedings, \LaTeX, text tagging}
 
 \begin{teaserfigure}
-  \includegraphics[width=\textwidth]{sampleteaser}
+  \includegraphics[width=\textwidth]{sampleteaser}\Description{A
+    baseball field}
   \caption{This is a teaser}
   \label{fig:teaser}
 \end{teaserfigure}
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/samplebody-conf.tex b/Master/texmf-dist/doc/latex/acmart/samples/samplebody-conf.tex
index 111e25809f4..54ce0e56864 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/samplebody-conf.tex
+++ b/Master/texmf-dist/doc/latex/acmart/samples/samplebody-conf.tex
@@ -232,12 +232,13 @@ displayable with \LaTeX.  If you work with pdf\LaTeX, use files in the
 each of these are found in the \textit{Author's Guide}.
 
 \begin{figure}
-\includegraphics{fly}
+\includegraphics{fly}\Description{A fly}
 \caption{A sample black and white graphic.}
 \end{figure}
 
 \begin{figure}
-\includegraphics[height=1in, width=1in]{fly}
+\includegraphics[height=1in, width=1in]{fly}\Description{A fly image,
+  to $1''\times1''$}
 \caption{A sample black and white graphic
 that has been resized with the \texttt{includegraphics} command.}
 \end{figure}
@@ -250,14 +251,15 @@ the figure and its caption.  And don't forget to end the environment
 with \textbf{figure*}, not \textbf{figure}!
 
 \begin{figure*}
-\includegraphics{flies}
+\includegraphics{flies}\Description{Several flies, spanning two
+  columns of text}
 \caption{A sample black and white graphic
 that needs to span two columns of text.}
 \end{figure*}
 
 
 \begin{figure}
-\includegraphics[height=1in, width=1in]{rosette}
+\includegraphics[height=1in, width=1in]{rosette}\Description{A rosette}
 \caption{A sample black and white graphic that has
 been resized with the \texttt{includegraphics} command.}
 \end{figure}
diff --git a/Master/texmf-dist/doc/latex/acmart/samples/samplebody-journals.tex b/Master/texmf-dist/doc/latex/acmart/samples/samplebody-journals.tex
index 5532993a31f..6d162b72bcc 100644
--- a/Master/texmf-dist/doc/latex/acmart/samples/samplebody-journals.tex
+++ b/Master/texmf-dist/doc/latex/acmart/samples/samplebody-journals.tex
@@ -186,6 +186,7 @@ contains function calls, assignments, if clauses, and while loops.
 % Figure
 \begin{figure}
   \includegraphics{mouse}
+  \Description{A mouse}
   \caption{Code before preprocessing.}
   \label{fig:one}
 \end{figure}
diff --git a/Master/texmf-dist/source/latex/acmart/acmart.dtx b/Master/texmf-dist/source/latex/acmart/acmart.dtx
index 79316ac956c..c452e635fc3 100644
--- a/Master/texmf-dist/source/latex/acmart/acmart.dtx
+++ b/Master/texmf-dist/source/latex/acmart/acmart.dtx
@@ -1,4 +1,3 @@
-
 % \iffalse
 %
 % Copyright 2016-2018, Association for Computing Machinery
@@ -104,6 +103,7 @@
 %  Dirk Beyer,
 %  Joachim Breitner,
 %  Benjamin Byholm,
+%  Nils Anders Danielsson,
 %  Michael Ekstrand,
 %  Matthew Fluet,
 %  Paolo G.~Giarrusso,
@@ -119,6 +119,7 @@
 %  John Owens,
 %  Joel Nider,
 %  Tobias Pape,
+%  Philip Quinn,
 %  Mathias Rav,
 %  Andreas Reichinger,
 %  Matteo Riondato,
@@ -1189,6 +1190,35 @@
 % A good way to do so is to put the contents into a
 % \cs{minipage} of the width \cs{columnwidth}.
 %
+%
+%\subsection{Descriptions of images}
+%\label{sec:descriptions}
+%
+% \DescribeMacro{\Description}%
+% Some readers of ACM publications might be visually challenged.
+% These readers might use a voice-over software to read aloud the
+% papers.  It is important to provided them a description of each
+% image used in the paper.
+%
+% The command \cs{Description}\oarg{short description}\marg{long
+% description} should be placed inside every \texttt{figure},
+% \texttt{teaserfigure} or \texttt{marginfigure} environment to
+% provide a description of the image(s) used in the figure.  Unlike
+% \cs{caption}, which is used alongside the image, \cs{Description} is
+% intended to be used instead of the image, for example,
+% \begin{verbatim}
+% \begin{figure}
+%   \centering
+%   \includegraphics{voltage}
+%   \Description{A bell-like histogram centered at $0.5$~V with most
+%   measurements between $0.2$~V and $0.8$~V}
+%   \caption{Histogram of the measurements of voltage}
+%   \label{fig:voltage}
+% \end{figure}
+% \end{verbatim}
+% At present the lack of descriptions generates a warning at
+% compilation.  
+%
 %\subsection{Theorems}
 %\label{sec:ug_theorems}
 %
@@ -1715,7 +1745,7 @@
 \ProvidesFile{acmart.dtx}
 %</gobble>
 %<class>\ProvidesClass{acmart}
-[2018/10/20 v1.55 Typesetting articles for the Association for
+[2018/11/11 v1.56 Typesetting articles for the Association for
 Computing Machinery]
 %    \end{macrocode}
 %
@@ -1799,6 +1829,7 @@ Computing Machinery]
 % \changes{1.53}{2018/04/14}{Rearranged docs}
 % \changes{1.54}{2018/06/17}{Moved footnote stuff before hyperref call
 % (Ross Moore)}
+% \changes{1.56}{2018/11/11}{Documented \cs{Description}}
 %
 % And the driver code:
 %    \begin{macrocode}
@@ -2580,7 +2611,7 @@ Computing Machinery]
     \else
     \hypersetup{hidelinks}
   \fi
-  \hypersetup{pdflang={English},
+  \hypersetup{pdflang={en},
     pdfdisplaydoctitle}}
 %    \end{macrocode}
 %
@@ -2668,6 +2699,7 @@ Computing Machinery]
 % \changes{v1.17}{2016/07/07}{Slightly decreased margins for sigs}
 % \changes{v1.29}{2017/01/22}{Increased head to 13pt}
 % \changes{v1.40}{2017/07/15}{Added heightrounded to geometry}
+% \changes{v1.56}{2018/10/16}{Make two-column layouts flush (Philip Quinn)}
 % We use |geometry| for dimensions.  Note that the present margins do not
 % depend on the font size option---we might need to change this.
 % See \url{https://github.com/borisveytsman/acmart/issues/5#issuecomment-272881329}.
@@ -2843,6 +2875,28 @@ Computing Machinery]
 %    \end{macrocode}
 %
 % \end{macro}
+%
+% In two-column layouts, force both columns to be the same height by inserting
+% extra internal vertical space to fill out the page.
+%    \begin{macrocode}
+\ifcase\ACM@format@nr
+\relax % manuscript
+\or % acmsmall
+\or % acmlarge
+\or % acmtog
+  \flushbottom
+\or % sigconf
+  \flushbottom
+\or % siggraph
+  \flushbottom
+\or % sigplan
+  \flushbottom
+\or % sigchi
+  \flushbottom
+\or % sigchi-a
+\fi
+%    \end{macrocode}
+%
 %\subsection{Fonts}
 %\label{sec:fonts}
 %
@@ -2898,12 +2952,15 @@ Computing Machinery]
 % \changes{v1.51}{2018/04/05}{XeTeX now uses OTF fonts (Joachim
 % Breitner)}
 % \changes{v1.54}{2018/07/16}{XeTeX now uses T1 encoding}
+% \changes{v1.56}{2018/11/11}{Looks like XeTeX requires explicit
+% monotype font delcaration}
 % We use Libertine throughout.
 %    \begin{macrocode}
 \if@ACM@newfonts
   \RequirePackage[T1]{fontenc}
 \ifxetex
   \RequirePackage[tt=false]{libertine}
+  \setmonofont{inconsolata}
 \else
   \RequirePackage[tt=false, type1=true]{libertine}
 \fi
@@ -2933,6 +2990,55 @@ Computing Machinery]
 %    \end{macrocode}
 %
 %
+%
+%\subsection{Image descriptions}
+%\label{sec:description}
+%
+% \begin{macro}{\if@Description@present}
+% \changes{v1.56}{2018/11/11}{Added macro}
+% A local switch: whether there is a description in the given figure
+%    \begin{macrocode}
+\newif\if@Description@present
+\@Description@presenttrue
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\if@undescribed@images}
+% \changes{v1.56}{2018/11/11}{Added macro}
+% A global switch whether some images were \emph{not} described
+%    \begin{macrocode}
+\newif\if@undescribed@images
+\@undescribed@imagesfalse
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\Description}
+% \changes{v1.56}{2018/11/11}{Added macro}
+% The Description macro right now just sets switches
+%    \begin{macrocode}
+\newcommand\Description[2][]{\global\@Description@presenttrue}
+%    \end{macrocode}
+% \end{macro}
+%
+% The global warning
+%    \begin{macrocode}
+\AtEndDocument{\if@undescribed@images
+  \ClassWarningNoLine{\@classname}{Some images may lack descriptions}\fi}
+%    \end{macrocode}
+%
+% Hooks for figures
+%    \begin{macrocode}
+\AtBeginEnvironment{figure}{\@Description@presentfalse}
+\AtBeginEnvironment{figure*}{\@Description@presentfalse}
+\AtEndEnvironment{figure}{\if@Description@present\else
+  \global\@undescribed@imagestrue
+  \ClassWarning{\@classname}{A possible image without description}\fi}
+\AtEndEnvironment{figure*}{\if@Description@present\else
+  \global\@undescribed@imagestrue
+  \ClassWarning{\@classname}{A possible image without description}\fi}
+%    \end{macrocode}
+% 
+%
 %\subsection{Floats}
 %\label{sec:floats}
 %
@@ -3003,10 +3109,17 @@ Computing Machinery]
 %
 % \begin{macro}{\@marginfigure}
 % \changes{v1.12}{2016/05/30}{Now centering by default}
+% \changes{v1.56}{2018/11/11}{Added checking for description}
 %   The processing of the saved text
 %    \begin{macrocode}
-\long\def\@marginfigure#1{\bgroup\captionsetup{type=figure}%
-  \marginpar{\centering\small#1}\egroup}
+\long\def\@marginfigure#1{\bgroup
+  \captionsetup{type=figure}%
+  \marginpar{\@Description@presentfalse\centering
+    \small#1\if@Description@present\else
+      \global\@undescribed@imagestrue
+      \ClassWarning{\@classname}{A possible image without description}
+      \fi}%
+  \egroup}
 %    \end{macrocode}
 %
 % \end{macro}
@@ -4212,9 +4325,10 @@ Computing Machinery]
 %    \end{macrocode}
 %
 % \begin{macro}{\@concepts}
-%   This is the storage macro for concepts
+%   This is the storage macro and counter for concepts
 %    \begin{macrocode}
 \let\@concepts\@empty
+\newcounter{@concepts}
 %    \end{macrocode}
 %
 % \end{macro}
@@ -4236,11 +4350,14 @@ Computing Machinery]
 % \changes{v1.29}{2017/01/22}{Add spacing after bullet and around
 % rightarrow; semicolon separators no longer in bold/italic (John Wickerson)}
 % \changes{v1.40}{2017/05/27}{Now we can parse |Significance~General| nodes}
+% \changes{v1.56}{2018/10/23}{End the concepts list with a period
+% (Philip Quinn)}
 %   The parser of the expression |Significance~General~Specific| (we need
 %   |textcomp| for |\textrightarrow|).  Note that |Specific| can be empty!
 %    \begin{macrocode}
 \RequirePackage{textcomp}
 \def\ccsdesc@parse#1~#2~#3~{%
+  \stepcounter{@concepts}%
   \expandafter\ifx\csname CCS@General@#2\endcsname\relax
     \expandafter\gdef\csname CCS@General@#2\endcsname{\textbullet\
       \textbf{#2}}%
@@ -4254,9 +4371,10 @@ Computing Machinery]
     \expandafter\gdef\csname CCS@Punctuation@#2\endcsname{
       \textrightarrow\ }%
     \expandafter\g@addto@macro\expandafter{\csname CCS@Specific@#2\endcsname}{%
-     \ifnum#1>499\textbf{#3}; \else
-     \ifnum#1>299\textit{#3}; \else
-     #3; \fi\fi}%
+     \addtocounter{@concepts}{-1}%
+     \ifnum#1>499\textbf{#3}\else
+     \ifnum#1>299\textit{#3}\else
+     #3\fi\fi\ifnum\value{@concepts}=0.\else; \fi}%
   \fi
 \ccsdesc@parse@finish}
 %    \end{macrocode}
@@ -5539,14 +5657,20 @@ Computing Machinery]
 % \end{macro}
 %
 % \begin{macro}{\@mkteasers}
-%   Typesetting the teasers
+% Typesetting the teasers
+% \changes{v1.56}{2018/11/1}{Added check for description}
 %    \begin{macrocode}
 \def\@mkteasers{%
   \ifx\@teaserfigures\@empty\else
     \def\@teaser##1{\par\bigskip\bgroup
       \captionsetup{type=figure}##1\egroup\par}
     \global\setbox\mktitle@bx=\vbox{\noindent\box\mktitle@bx\par
-    \noindent\@teaserfigures\par\medskip}%
+      \noindent\@Description@presentfalse
+      \@teaserfigures\par\if@Description@present\else
+         \global\@undescribed@imagestrue
+         \ClassWarning{\@classname}{A possible image without
+           description}\fi
+    \medskip}%    
   \fi}
 %    \end{macrocode}
 %
@@ -6471,6 +6595,14 @@ Computing Machinery]
 %\subsection{Acknowledgments}
 %\label{sec:acks}
 %
+% \begin{macro}{\acksname}
+% \changes{v1.56}{2018/10/16}{Added macro (Philip Quinn)}
+%    \begin{macrocode}
+\newcommand\acksname{Acknowledgments}
+%    \end{macrocode}
+%
+% \end{macro}
+%
 % \begin{macro}{\acks}
 % \changes{v1.19}{2016/07/28}{Include 'Acknowledgements' in PDF bookmarks
 % (Matthew Fluet)}
@@ -6479,8 +6611,8 @@ Computing Machinery]
 %    \begin{macrocode}
 \specialcomment{acks}{%
   \begingroup
-  \section*{Acknowledgments}
-  \phantomsection\addcontentsline{toc}{section}{Acknowledgments}
+  \section*{\acksname}
+  \phantomsection\addcontentsline{toc}{section}{\acksname}
 }{%
   \endgroup
 }
diff --git a/Master/texmf-dist/tex/latex/acmart/acmart.cls b/Master/texmf-dist/tex/latex/acmart/acmart.cls
index 57d17eb869b..1bc1885d088 100644
--- a/Master/texmf-dist/tex/latex/acmart/acmart.cls
+++ b/Master/texmf-dist/tex/latex/acmart/acmart.cls
@@ -20,7 +20,6 @@
 %% original source files, as listed above, are part of the
 %% same distribution. (The sources need not necessarily be
 %% in the same archive or directory.)
-
 %% \CharacterTable
 %%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
 %%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
@@ -38,7 +37,7 @@
 %%   Right brace   \}     Tilde         \~}
 \NeedsTeXFormat{LaTeX2e}
 \ProvidesClass{acmart}
-[2018/10/20 v1.55 Typesetting articles for the Association for
+[2018/11/11 v1.56 Typesetting articles for the Association for
 Computing Machinery]
 \def\@classname{acmart}
 \InputIfFileExists{acmart-preload-hook.tex}{%
@@ -482,7 +481,7 @@ Computing Machinery]
     \else
     \hypersetup{hidelinks}
   \fi
-  \hypersetup{pdflang={English},
+  \hypersetup{pdflang={en},
     pdfdisplaydoctitle}}
 \if@ACM@natbib
   \let\citeN\cite
@@ -629,6 +628,22 @@ Computing Machinery]
   \expandafter\@iiiparbox\@mpargs{\unvbox\@tempboxa}}
 \def\@textbottom{\vskip \z@ \@plus 1pt}
 \let\@texttop\relax
+\ifcase\ACM@format@nr
+\relax % manuscript
+\or % acmsmall
+\or % acmlarge
+\or % acmtog
+  \flushbottom
+\or % sigconf
+  \flushbottom
+\or % siggraph
+  \flushbottom
+\or % sigplan
+  \flushbottom
+\or % sigchi
+  \flushbottom
+\or % sigchi-a
+\fi
 \RequirePackage{iftex}
 \ifPDFTeX
 \input{glyphtounicode}
@@ -657,6 +672,7 @@ Computing Machinery]
   \RequirePackage[T1]{fontenc}
 \ifxetex
   \RequirePackage[tt=false]{libertine}
+  \setmonofont{inconsolata}
 \else
   \RequirePackage[tt=false, type1=true]{libertine}
 \fi
@@ -669,6 +685,21 @@ Computing Machinery]
 \if@ACM@sigchiamode
   \renewcommand{\familydefault}{\sfdefault}
 \fi
+\newif\if@Description@present
+\@Description@presenttrue
+\newif\if@undescribed@images
+\@undescribed@imagesfalse
+\newcommand\Description[2][]{\global\@Description@presenttrue}
+\AtEndDocument{\if@undescribed@images
+  \ClassWarningNoLine{\@classname}{Some images may lack descriptions}\fi}
+\AtBeginEnvironment{figure}{\@Description@presentfalse}
+\AtBeginEnvironment{figure*}{\@Description@presentfalse}
+\AtEndEnvironment{figure}{\if@Description@present\else
+  \global\@undescribed@imagestrue
+  \ClassWarning{\@classname}{A possible image without description}\fi}
+\AtEndEnvironment{figure*}{\if@Description@present\else
+  \global\@undescribed@imagestrue
+  \ClassWarning{\@classname}{A possible image without description}\fi}
 \RequirePackage{caption, float}
 \captionsetup[table]{position=top}
 \if@ACM@journal
@@ -707,8 +738,14 @@ Computing Machinery]
 \long\def\@sidebar#1{\bgroup\captionsetup{type=sidebar}%
   \marginpar{\small#1}\egroup}
 \newenvironment{marginfigure}{\Collect@Body\@marginfigure}{}
-\long\def\@marginfigure#1{\bgroup\captionsetup{type=figure}%
-  \marginpar{\centering\small#1}\egroup}
+\long\def\@marginfigure#1{\bgroup
+  \captionsetup{type=figure}%
+  \marginpar{\@Description@presentfalse\centering
+    \small#1\if@Description@present\else
+      \global\@undescribed@imagestrue
+      \ClassWarning{\@classname}{A possible image without description}
+      \fi}%
+  \egroup}
 \newenvironment{margintable}{\Collect@Body\@margintable}{}
 \long\def\@margintable#1{\bgroup\captionsetup{type=table}%
   \marginpar{\centering\small#1}\egroup}
@@ -1332,10 +1369,12 @@ Computing Machinery]
 \RequirePackage{comment}
 \excludecomment{CCSXML}
 \let\@concepts\@empty
+\newcounter{@concepts}
 \newcommand\ccsdesc[2][100]{%
   \ccsdesc@parse#1~#2~~\ccsdesc@parse@end}
 \RequirePackage{textcomp}
 \def\ccsdesc@parse#1~#2~#3~{%
+  \stepcounter{@concepts}%
   \expandafter\ifx\csname CCS@General@#2\endcsname\relax
     \expandafter\gdef\csname CCS@General@#2\endcsname{\textbullet\
       \textbf{#2}}%
@@ -1349,9 +1388,10 @@ Computing Machinery]
     \expandafter\gdef\csname CCS@Punctuation@#2\endcsname{
       \textrightarrow\ }%
     \expandafter\g@addto@macro\expandafter{\csname CCS@Specific@#2\endcsname}{%
-     \ifnum#1>499\textbf{#3}; \else
-     \ifnum#1>299\textit{#3}; \else
-     #3; \fi\fi}%
+     \addtocounter{@concepts}{-1}%
+     \ifnum#1>499\textbf{#3}\else
+     \ifnum#1>299\textit{#3}\else
+     #3\fi\fi\ifnum\value{@concepts}=0.\else; \fi}%
   \fi
 \ccsdesc@parse@finish}
 \def\ccsdesc@parse@finish#1\ccsdesc@parse@end{}
@@ -2149,7 +2189,12 @@ Computing Machinery]
     \def\@teaser##1{\par\bigskip\bgroup
       \captionsetup{type=figure}##1\egroup\par}
     \global\setbox\mktitle@bx=\vbox{\noindent\box\mktitle@bx\par
-    \noindent\@teaserfigures\par\medskip}%
+      \noindent\@Description@presentfalse
+      \@teaserfigures\par\if@Description@present\else
+         \global\@undescribed@imagestrue
+         \ClassWarning{\@classname}{A possible image without
+           description}\fi
+    \medskip}%
   \fi}
 \def\@mkabstract{\bgroup
   \ifx\@abstract\@lempty\else
@@ -2639,10 +2684,11 @@ Computing Machinery]
 }{%
   \popQED\endtrivlist\@endpefalse
 }
+\newcommand\acksname{Acknowledgments}
 \specialcomment{acks}{%
   \begingroup
-  \section*{Acknowledgments}
-  \phantomsection\addcontentsline{toc}{section}{Acknowledgments}
+  \section*{\acksname}
+  \phantomsection\addcontentsline{toc}{section}{\acksname}
 }{%
   \endgroup
 }