exsheets (10apr13)

git-svn-id: svn://tug.org/texlive/trunk@29840 c570f23f-e606-0410-a88d-b1316a301751

8 files changed, 287 insertions, 126 deletions

diff --git a/Master/texmf-dist/doc/latex/exsheets/README b/Master/texmf-dist/doc/latex/exsheets/README
index 8bf29bafce0..02c40c8c448 100644
--- a/Master/texmf-dist/doc/latex/exsheets/README
+++ b/Master/texmf-dist/doc/latex/exsheets/README
@@ -1,14 +1,14 @@
 --------------------------------------------------------------------------
-EXSHEETS v0.8a - 2013/04/04
+EXSHEETS v0.9a - 2013/04/08
 
 bundled packages:
 the EXSHEETS package
   Yet another package for the creation of exercise sheets
-the TRANSLATIONS package v0.8a
+the TRANSLATIONS package v0.9a
   a simple translator
 the CNTFORMATS package v0.4
   A different way to read counters.
-the TASKS package v0.8a
+the TASKS package v0.9
   Horizontal columned lists.
 
 All mentioned packages are described in exsheets_en.pdf
diff --git a/Master/texmf-dist/doc/latex/exsheets/exsheets_en.pdf b/Master/texmf-dist/doc/latex/exsheets/exsheets_en.pdf
index fe8fc148d19..f459bbf0559 100644
--- a/Master/texmf-dist/doc/latex/exsheets/exsheets_en.pdf
+++ b/Master/texmf-dist/doc/latex/exsheets/exsheets_en.pdf
diff --git a/Master/texmf-dist/doc/latex/exsheets/exsheets_en.tex b/Master/texmf-dist/doc/latex/exsheets/exsheets_en.tex
index dc93fd78468..6d2ff8a691d 100644
--- a/Master/texmf-dist/doc/latex/exsheets/exsheets_en.tex
+++ b/Master/texmf-dist/doc/latex/exsheets/exsheets_en.tex
@@ -105,9 +105,9 @@
   lastvariant, midrule, NewQuSolPair, numberofquestions,
   points, PrintIfIncludeActiveF, PrintIfIncludeActiveT, PrintIfIncludeActiveTF,
     printsolutions, PrintSolutionsF, PrintSolutionsTF, PrintSolutionsT,
-  questionsincludedlast, QuestionNumber, RenewQuSolPair, rightarrow,
+  questionsincludedlast, QuestionNumber, RenewQuSolPair, rightarrow, rlap,
   s, sample, setlength, SetQuestionProperties, SetupExSheets, SetVariations,
-    spacing, square, sumpoints,
+    spacing, square, startnewitemline, sumpoints,
   tabcolsep, textcite, textcolor, toprule, totalpoints,
   variant, vary
 }
@@ -1398,14 +1398,16 @@ following macro:
 \secidx*{Include from External Files}
 
 \section{Own Question/Solution Pairs}
-\noindent\sinceversion{0.3}\ExSheets provides he possibility to create new
+\noindent\changedversion{0.9}\ExSheets provides he possibility to create new
 environments that behave like the \code{question} and \code{solution} environments.
 This would allow, for example, to define a \code{question*}/\code{solution*}
 environment pair for bonus questions. The following commands may be used in the
 document preamble:
 \begin{beschreibung}
- \Befehl{NewQuSolPair}{<question>}\oa{<question options>}\ma{<solution>}\oa{<solution options>}
- \Befehl{RenewQuSolPair}{<question>}\oa{<question options>}\ma{<solution>}\oa{<solution options>}
+ \Befehl{NewQuSolPair}{<question>}\oa{<question options>}\oa{<general options>}%
+   \ma{<solution>}\oa{<solution options>}\oa{<general options>}
+ \Befehl{RenewQuSolPair}{<question>}\oa{<question options>}\oa{<general options>}%
+   \ma{<solution>}\oa{<solution options>}\oa{<general options>}
 \end{beschreibung}
 The standard environments are defined as follows:
 \begin{beispiel}[code only]
@@ -1447,7 +1449,8 @@ be some more lines: \blank[width=5\linewidth]{}
 The options are these:
 \begin{beschreibung}
  \Option[blank]{style}{line|wave|dline|dotted|dashed}\Default{line}
-   The style of the line.
+   The style of the line. This uses the corresponding command from the \paket{ulem}
+   package and is the whole reason why \ExSheets loads it in the first place.
  \Option[blank]{scale}{<num>}\Default{1}
    Scales the width of the blank by factor \code{<num>} unless the width is
    explicitly set.
@@ -1664,6 +1667,23 @@ The following examples use a sample text defined as follows:
  A `simple' heading. \sample
 \end{question}
 
+\subsubsection{The `empty' Instance}
+\sinceversion{0.9a}
+\begin{beispiel}[code only]
+ \DeclareInstance{exsheets-heading}{empty}{default}
+  {
+    runin = true ,
+    above = \parskip ,
+    below = \parskip ,
+    attach           =
+      { main[l,vc] points[l,vc] (\linewidth + \marginparsep,0pt) } 
+  }
+\end{beispiel}
+\SetupExSheets{headings=empty}
+\begin{question}{1}
+ An `empty' heading. \sample
+\end{question}
+
 \subsubsection{The `block-rev' Instance}
 \begin{beispiel}[code only]
  \DeclareInstance{exsheets-heading}{block-rev}{default}
@@ -1737,7 +1757,6 @@ The following examples use a sample text defined as follows:
  A `block-nr' heading. \sample
 \end{question}
 
-\newpage% FIXME
 \subsubsection{The `block-nr-wp' Instance}
 \begin{beispiel}[code only]
  \DeclareInstance{exsheets-heading}{block-nr-wp}{default}
@@ -1868,7 +1887,6 @@ The following examples use a sample text defined as follows:
  A `runin-nr-wp' heading. \sample
 \end{question}
 
-\newpage% FIXME
 \subsubsection{The `inline' Instance}
 \sinceversion{0.5}
 \begin{beispiel}[code only]
@@ -1916,7 +1934,6 @@ Text before
 \end{question}
  Text after
 
-\newpage% FIXME
 \subsubsection{The `inline-nr' Instance}
 \sinceversion{0.5}
 \begin{beispiel}[code only]
@@ -2107,6 +2124,7 @@ primarily is for. If you don't need this feature you're better off using traditi
 part~\ref{part:cntformats}}, \paket{xtemplate} and \paket{environ}.
 
 \section{How it works}
+\subsection{The Basics}
 The \code{tasks} environment is similar to a list like \code{enumerate} but not
 the same:
 \begin{itemize}
@@ -2162,7 +2180,41 @@ number of columns used by the environment is specified.
  \task \sample
  \task \s\par\s
 \end{tasks}
- 
+
+\subsection{Introducing a New Row}
+\noindent\sinceversion{0.9}Sometimes it may come in handy if the current
+row of items could be terminated and a new one is started. This is possible
+with the following command:
+\begin{beschreibung}
+ \Befehl{startnewitemline}
+\end{beschreibung}
+\begin{beispiel}[code only]
+ \begin{tasks}(4)
+  \task the first
+  \task the second
+  \task the third
+  \task the fourth
+  \task \rlap{the fifth item is way too long for this so we start a new row} \startnewitemline
+  \task the sixth
+  \task the seventh
+  \task \rlap{the eighth item also is too long} \startnewitemline
+  \task the nineth
+  \task the tenth
+ \end{tasks}
+\end{beispiel}
+\begin{tasks}(4)
+ \task the first
+ \task the second
+ \task the third
+ \task the fourth
+ \task \rlap{the fifth item is way too long for this so we start a new row} \startnewitemline
+ \task the sixth
+ \task the seventh
+ \task \rlap{the eighth item also is too long} \startnewitemline
+ \task the nineth
+ \task the tenth
+\end{tasks}
+
 \section{Available Options}\secidx[Options]{\Tasks}[tasks]\label{sec:tasks:options}
 The \Tasks package has one package option which also is called when you load
 \ExSheets with the \key{load-tasks} option.
@@ -2176,15 +2228,20 @@ The environment itself has some more options, namely these:
 \begin{beschreibung}
  \Option{style}{<instance>}\Default{}
    Choose the instance to be used. Read more on this in section~\ref{sec:tasks}.
- \Option{label}{<label specs>}\Default{}
-   Sets a custom label. The letters \code{tsk} are replaced with the task-counter.
-   An optional argument directly following these letters specifies the counter format:
-   \code{1}: \cmd{arabic}, \code{a}: \cmd{alph}, \code{A}: \cmd{Alph}, \code{r}:
-   \cmd{roman} and \code{R}: \cmd{Roman}.
- \Option{label-width}{<dim>}\Default{3ex}
+ \Option{counter-format}{<counter specs>}\Default{}
+   \sinceversion{0.9}Sets a custom label. The letters \code{tsk} are replaced
+   with the task-counter. An optional argument directly following these letters
+   specifies the counter format: \code{1}: \cmd{arabic}, \code{a}: \cmd{alph},
+   \code{A}: \cmd{Alph}, \code{r}: \cmd{roman} and \code{R}: \cmd{Roman}.
+ \Option{label-format}{<code>}\Default{}
+   \changedversion{0.9}Can be used to apply a formatting like, \emph{e.g.},
+   \cmd*{bfseries} to the labels.
+ \Option{label}{<code>}\Default{}
+   \changedversion{0.9}Overwrite the automatic label to a custom one.
+ \Option{label-width}{<dim>}\Default{1em}
    Sets the width of the item labels.
- \Option{label-offset}{<dim>}\Default{1ex}
-   \sinceversion{0.7}Sets the offset, i.e., the distance between label and item.
+ \Option{label-offset}{<dim>}\Default{.3333em}
+   \sinceversion{0.7}Sets the offset, \emph{i.e.}, the distance between label and item.
  \Option{label-align}{left|right|center}\Default{left}
    \sinceversion{0.7}Determines how the labels are aligned within the label-box
    whose width is set with \key{label-width}
@@ -2192,6 +2249,8 @@ The environment itself has some more options, namely these:
    Sets the skip before the list.
  \Option{after-skip}{<skip>}\Default{0pt}
    Sets the skip after the list.
+ \Option{after-item-skip}{<skip>}\Default{1ex plus 1ex minus 1ex}
+   \sinceversion{0.9}This vertical skip is inserted between rows of items.
  \Option{resume}{\default{true}|false}\Default{false}
    The enumeration will resume from a previous \code{tasks} environment. In order
    to use this option properly you shouldn't mix different \code{tasks} environments
@@ -2204,7 +2263,7 @@ These options can also be set using a setup command:
 
 Now the same list as above but with three columns and a different label:
 \begin{beispiel}[code only]
- \begin{tasks}[label=(tsk[r]),label-width=4ex](3)
+ \begin{tasks}[counter-format=(tsk[r]),label-width=4ex](3)
   \task \sample
   \task \s\ \s
   \task \s
@@ -2212,7 +2271,7 @@ Now the same list as above but with three columns and a different label:
   \task \s\par\s
  \end{tasks}
 \end{beispiel}
-\begin{tasks}[label=(tsk[r]),label-width=4ex](3)
+\begin{tasks}[counter-format=(tsk[r]),label-width=4ex](3)
  \task \sample
  \task \s\ \s
  \task \s
@@ -2225,7 +2284,7 @@ Let's use it inside a question:
  % since settings are local the following ones will be lost
  % outside this example; see the appendix how the solution
  % appears there
- \settasks{label=qu.tsk,label-width=5ex}
+ \settasks{counter-format=qu.tsk,label-width=5ex}
  \begin{question}[type=exam]{4}
   I have these two tasks for you. Shall we begin?
   \begin{tasks}(2)
@@ -2286,6 +2345,8 @@ It is possible to add custom environments that work like the \code{tasks} enviro
    new item. Default for \code{<separator>} is \cmd{task}, default for
    \code{<cols>} is \code{1}. The \code{<options>} are the ones described in
    section~\ref{sec:tasks:options}.
+ \Befehl{RenewTasks}[<options>]{<name>}\oa{<separator}\da{<cols>}\newline
+   Renew environment previously defined with \cmd{NewTasks}.
 \end{beschreibung}
 The \code{tasks} environment is defined as follows:
 \begin{beispiel}[code only]
@@ -2296,7 +2357,7 @@ The separator does not have to be a control sequence:
 \begin{beispiel}
  % preamble:
  % \usepackage{dingbat}
- \NewTasks[label=\footnotesize\leftthumbsup]{done}[*]
+ \NewTasks[label=\footnotesize\leftthumbsup,label-width=1.3em]{done}[*]
  \begin{done}
   * First task
   * Second Task
@@ -2358,9 +2419,10 @@ of their usage.
     enumerate       : boolean   = true    ,
     label           : tokenlist           ,
     indent          : length    = 2.5em   ,
-    label-format    : tokenlist = tsk[a]) ,
-    label-width     : length    = 3ex     ,
-    label-offset    : length    = 1ex     ,
+    counter-format  : tokenlist = tsk[a]) ,
+    label-format    : tokenlist           ,
+    label-width     : length    = 1em     ,
+    label-offset    : length    = .3333em ,
     after-item-skip : skip      = 1ex plus 1ex minus 1ex
   }
 \end{beispiel}
@@ -2373,15 +2435,18 @@ This is rather brief this time:
  % available when `load-tasks=true':
  % ITEMIZE:
  \DeclareInstance{tasks}{itemize}{default}
-   { enumerate    = false }
+   {
+     enumerate   = false ,
+     label-width = 1.125em
+   }
  % ENUMERATE:
  \DeclareInstance{tasks}{enumerate}{default}
-   { label-format = tsk. }
+   { counter-format = tsk. }
  % MULTIPLECHOICE:
  \DeclareInstance{tasks}{multiplechoice}{default}
    {
-     enumerate    = false       ,
-     label        = \choicebox  ,
+     enumerate = false       ,
+     label     = \choicebox  ,
    }
 \end{beispiel}
 \secidx*{The `tasks' Object}
diff --git a/Master/texmf-dist/tex/latex/exsheets/exsheets.sty b/Master/texmf-dist/tex/latex/exsheets/exsheets.sty
index cc2b91f14d2..f24065715ef 100644
--- a/Master/texmf-dist/tex/latex/exsheets/exsheets.sty
+++ b/Master/texmf-dist/tex/latex/exsheets/exsheets.sty
@@ -31,8 +31,8 @@
 % If you have any ideas, questions, suggestions or bugs to report, please
 % feel free to contact me.
 % ----------------------------------------------------------------------------
-\def\exsheets@date{2013/04/04}
-\def\exsheets@version{0.8a}
+\def\exsheets@date{2013/04/08}
+\def\exsheets@version{0.9a}
 
 \RequirePackage { expl3 , xparse }
 \ProvidesExplPackage
@@ -120,7 +120,7 @@
     I'm~doing~nothing.
   }
 
-\cs_new:Npn \exsheets_depr_cmd:nn #1#2
+\cs_new_protected:Npn \exsheets_depr_cmd:nn #1#2
   {
     \cs_new:Npn #1
       { \msg_warning:nnnn { exsheets } { deprecated-command } { #1 } { #2 } #2 }
@@ -258,45 +258,45 @@
 \tl_new:N         \l__exsheets_points_post_bonus_marker_tl
 \tl_set:Nn        \l__exsheets_points_post_bonus_marker_tl { ) }
 
-\cs_new_nopar:Npn \exsheets_set_points_name:n #1
+\cs_new_protected_nopar:Npn \exsheets_set_points_name:n #1
   {
     \tl_if_in:nnTF { #1 } { / }
       { \__exsheets_set_points_name_aux:nn #1 \q_stop }
       { \__exsheets_set_points_name_aux:nn #1 / \q_stop }
   }
 
-\cs_new_nopar:Npn \__exsheets_set_points_name_aux:nn #1/#2 \q_stop
+\cs_new_protected_nopar:Npn \__exsheets_set_points_name_aux:nn #1/#2 \q_stop
   {
     \tl_set:Nn \l__exsheets_points_name_tl { #1 }
     \tl_set:Nn \l__exsheets_points_name_plural_tl { #1#2 }
   }
 
-\cs_new_nopar:Npn \exsheets_set_bonus_name:n #1
+\cs_new_protected_nopar:Npn \exsheets_set_bonus_name:n #1
   {
     \tl_if_in:nnTF { #1 } { / }
       { \__exsheets_set_bonus_name_aux:nn #1 \q_stop }
       { \__exsheets_set_bonus_name_aux:nn #1 / \q_stop }
   }
 
-\cs_new_nopar:Npn \__exsheets_set_bonus_name_aux:nn #1/#2 \q_stop
+\cs_new_protected_nopar:Npn \__exsheets_set_bonus_name_aux:nn #1/#2 \q_stop
   {
     \tl_set:Nn \l__exsheets_bonus_name_tl { #1 }
     \tl_set:Nn \l__exsheets_bonus_name_plural_tl { #1#2 }
   }
 
 % FIXME: \fp_add will deprecate!
-\cs_new_nopar:Npn \exsheets_add_points:n #1
+\cs_new_protected_nopar:Npn \exsheets_add_points:n #1
   { \fp_gadd:Nn \g__exsheets_points_sum_fp { #1 } }
 \cs_generate_variant:Nn \exsheets_add_points:n { V }
 
-\cs_new_nopar:Npn \exsheets_add_bonus:n #1
+\cs_new_protected_nopar:Npn \exsheets_add_bonus:n #1
   { \fp_gadd:Nn \g__exsheets_bonus_sum_fp { #1 } }
 \cs_generate_variant:Nn \exsheets_add_bonus:n { V }
 
-\cs_new_nopar:Npn \exsheets@sum@of@points #1
+\cs_new_protected_nopar:Npn \exsheets@sum@of@points #1
   { \fp_gset:Nn \g__exsheets_total_points_fp { #1 } }
 
-\cs_new_nopar:Npn \exsheets@sum@of@bonus #1
+\cs_new_protected_nopar:Npn \exsheets@sum@of@bonus #1
   { \fp_gset:Nn \g__exsheets_total_bonus_fp { #1 } }
 
 \cs_new_nopar:Npn \exsheets_parse_points:n #1
@@ -325,7 +325,7 @@
   }
 \cs_generate_variant:Nn \exsheets_parse_bonus:n { V }
 
-\cs_new_nopar:Npn \exsheets_num:n #1
+\cs_new_protected_nopar:Npn \exsheets_num:n #1
   {
     \group_begin:
       \fp_set:Nn \l__exsheets_tmpa_tl { #1 }
@@ -414,14 +414,14 @@
       { \exsheets_print_bonus:n { #2 } }
   }
 
-\cs_new_nopar:Npn \exsheets_print_points:n #1
+\cs_new_protected_nopar:Npn \exsheets_print_points:n #1
   {
     \exsheets_parse_points:n { #1 }
     \exsheets_points_name:n { #1 }
   }
 \cs_generate_variant:Nn \exsheets_print_points:n { V }
 
-\cs_new_nopar:Npn \exsheets_print_bonus:n #1
+\cs_new_protected_nopar:Npn \exsheets_print_bonus:n #1
   {
     \exsheets_parse_bonus:n { #1 }
     \exsheets_bonus_name:n { #1 }
@@ -674,7 +674,7 @@
   { \__exsheets_declare_relgrades:n { #1 } }
 \@onlypreamble \DeclareRelGrades
 
-\cs_new:Npn \__exsheets_grade:nn #1#2
+\cs_new_protected:Npn \__exsheets_grade:nn #1#2
   {
     \prop_get:NnNTF \l__exsheets_relgrades_prop { #2 } \l__exsheets_tmpa_fp
       {
@@ -917,7 +917,7 @@
           { \fp_set:Nn \l__exsheets_question_bonus_fp { #2 } }
       }
   }
-\cs_new:Npn \__exsheets_read_points:n #1
+\cs_new_protected:Npn \__exsheets_read_points:n #1
   { \__exsheets_read_points:w #1++ \q_stop }
 
 \NewDocumentEnvironment { __exsheets_question: } { gg }
@@ -1127,7 +1127,7 @@
       }
   }
 
-\cs_new:Npn \__exsheets_restore_number_from_and_do:Nnn #1#2#3
+\cs_new_protected:Npn \__exsheets_restore_number_from_and_do:Nnn #1#2#3
   {
     \prop_get:NnN #1 { #2 } \l__exsheets_tmpc_tl
     \tl_if_eq:NNF \l__exsheets_tmpc_tl \q_no_value
@@ -1292,7 +1292,7 @@
 
 \colorlet { exsheetsdebugcolor } { yellow }
 
-\cs_new:Npn \exsheets_debug_box:nn #1#2
+\cs_new_protected:Npn \exsheets_debug_box:nn #1#2
   {
     \exsheets_par:
     \noindent
@@ -1306,7 +1306,7 @@
 
 \cs_new:Npn \__exsheets_list_comma: {}
 
-\cs_new_nopar:Npn \exsheets_questions_debug:
+\cs_new_protected:Npn \exsheets_questions_debug:
   {
     \bool_if:nT
       { \l__exsheets_questions_debug_bool && \l__exsheets_inside_question_bool }
@@ -1744,7 +1744,7 @@
 \bool_new:N       \l__exsheets_solutions_runin_bool
 \bool_set_false:N \l__exsheets_solutions_runin_bool
 
-\cs_new_nopar:Npn \__exsheets_solutions_name:nn #1#2
+\cs_new_protected_nopar:Npn \__exsheets_solutions_name:nn #1#2
   {
     \tl_if_blank:VT \l__exsheets_solution_heading_instance_tl
       {
@@ -1855,7 +1855,7 @@
     \int_set:Nn \l__exsheets_counter_qu_int { \arabic{question} }
   }
 
-\cs_new:Npn \__exsheets_print_solution_if:nn #1#2
+\cs_new_protected:Npn \__exsheets_print_solution_if:nn #1#2
   {
     \exp_args:No \int_compare:nT { #2 }
       {
@@ -2088,7 +2088,7 @@
       }
   }
 
-\cs_new_nopar:Npn \__exsheets_read_number:w #1-#2-#3 \q_stop
+\cs_new_protected_nopar:Npn \__exsheets_read_number:w #1-#2-#3 \q_stop
   {
     \int_zero:N \l__exsheets_counter_ch_int
     \int_zero:N \l__exsheets_counter_sec_int
@@ -2102,7 +2102,7 @@
     \int_set:Nn \l__exsheets_counter_qu_int { #3 }
   }
 
-\cs_new_nopar:Npn \exsheets_solutions_print_name:nn #1#2
+\cs_new_protected_nopar:Npn \exsheets_solutions_print_name:nn #1#2
   {
     \tl_set_rescan:Nnn \l__exsheets_tmpa_tl
       { \char_set_catcode_letter:N \@ } { #1 }
@@ -2147,32 +2147,32 @@
 
 % ----------------------------------------------------------------------------
 % create question/solution pairs
-\cs_new:Npn \__exsheets_new_qu_sol_pair:nnnn #1#2#3#4
+\cs_new_protected:Npn \__exsheets_new_qu_sol_pair:nnnnnn #1#2#3#4#5#6
   {
     \NewDocumentEnvironment { #1 } { O{}G{} }
-      { \__exsheets_question: {#2,##1} {##2} }
+      { \keys_set:nn { exsheets } { #3 } \__exsheets_question: {#2,##1} {##2} }
       { \end__exsheets_question: }
-    \NewDocumentEnvironment { #3 } { O{} }
-      { \__exsheets_solution: {#4,##1} }
+    \NewDocumentEnvironment { #4 } { O{} }
+      { \keys_set:nn { exsheets } { #6 } \__exsheets_solution: {#5,##1} }
       { \end__exsheets_solution: }
   }
 
-\cs_new:Npn \__exsheets_renew_qu_sol_pair:nnnn #1#2#3#4
+\cs_new_protected:Npn \__exsheets_renew_qu_sol_pair:nnnnnn #1#2#3#4#5#6
   {
     \RenewDocumentEnvironment { #1 } { O{}G{} }
-      { \__exsheets_question: {#2,##1} {##2} }
+      { \keys_set:nn { exsheets } { #3 } \__exsheets_question: {#2,##1} {##2} }
       { \end__exsheets_question: }
-    \RenewDocumentEnvironment { #3 } { O{} }
-      { \__exsheets_solution: {#4,##1} }
+    \RenewDocumentEnvironment { #4 } { O{} }
+      { \keys_set:nn { exsheets } { #6 } \__exsheets_solution: {#5,##1} }
       { \end__exsheets_solution: }
   }
 
-\NewDocumentCommand \NewQuSolPair { mO{}mO{} }
-  { \__exsheets_new_qu_sol_pair:nnnn { #1 } { #2 } { #3 } { #4 } }
+\NewDocumentCommand \NewQuSolPair { mO{}O{}mO{}O{} }
+  { \__exsheets_new_qu_sol_pair:nnnnnn { #1 } { #2 } { #3 } { #4 } { #5 } { #6 } }
 \@onlypreamble \NewQuSolPair
 
-\NewDocumentCommand \RenewQuSolPair { mO{}mO{} }
-  { \__exsheets_renew_qu_sol_pair:nnnn { #1 } { #2 } { #3 } { #4 } }
+\NewDocumentCommand \RenewQuSolPair { mO{}O{}mO{}O{} }
+  { \__exsheets_renew_qu_sol_pair:nnnnnn { #1 } { #2 } { #3 } { #4 } { #5 } { #6 } }
 \@onlypreamble \RenewQuSolPair
 
 % ----------------------------------------------------------------------------
@@ -2550,6 +2550,30 @@ HISTORY:
 2013/04/04 v0.8a       - translations: bug fix in \DeclareDictTranslation
                        - exsheets: added Portuguese translations
                        - tasks: corrected \seq_length:N => \seq_count:N
+2013/04/07 v0.9        - translations: slightly improved messages
+                       - tasks: protected internal commands where appropriate
+                       - tasks: made enumerated item referenceable with \label{}
+                         and \ref{}; this introduced new options:
+                         * the former `label-format' is now `counter-format'
+                         * new: `label-format'
+                       - tasks: changed defaults for `label-width' and
+                         `label-offset'
+                       - tasks: ensure that the `after-item-skip' is only
+                         inserted in between rows
+                       - tasks: new option `after-item-skip'
+                       - tasks: improvements when label are set with optional
+                         argument:
+                         * a provided but empty argument is now correctly
+                           recognized
+                         * the counter is  _not_ stepped anymore for enumerated
+                           lists when the optional argument is provided
+                       - tasks: new command \nextonnewrow that forces the next
+                         item to be put at the beginning of a row
+                       - exsheets: protected internal commands where appropriate
+                       - exsheets: added possibility to set general options
+                         with \NewQuSolPair and \RenewQuSolPair
+2013/04/08 v0.9a       - exsheets: added headings instance `empty'
+                       - translations: changed fallback warning into info
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % TODO:
diff --git a/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.cfg b/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.cfg
index bb60744ab98..0db292f4be1 100644
--- a/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.cfg
+++ b/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.cfg
@@ -35,6 +35,16 @@
 \ProvidesFile{exsheets_headings.cfg}
   [\exsheets@date\space v\exsheets@version\space ExSheets headings instances]
 
+% EMPTY:
+\DeclareInstance { exsheets-heading } { empty } { default }
+  {
+    runin = true ,
+    above = \parskip ,
+    below = \parskip ,
+    attach           =
+      { main[l,vc] points[l,vc] (\linewidth + \marginparsep,0pt) } 
+  }
+
 % SIMPLE:
 \DeclareInstance { exsheets-heading } { simple } { default }
   {
diff --git a/Master/texmf-dist/tex/latex/exsheets/tasks.cfg b/Master/texmf-dist/tex/latex/exsheets/tasks.cfg
index fb8923ef0d6..5ac789f91d0 100644
--- a/Master/texmf-dist/tex/latex/exsheets/tasks.cfg
+++ b/Master/texmf-dist/tex/latex/exsheets/tasks.cfg
@@ -38,12 +38,12 @@
 \DeclareInstance { tasks } { itemize } { default }
   {
     enumerate    = false ,
-    label-width  = 2.25ex
+    label-width  = 1.125em
   }
 
 % ENUMERATE:
 \DeclareInstance { tasks } { enumerate } { default }
-  { label-format = tsk. }
+  { counter-format = tsk. }
 
 % MULTIPLECHOICE
 \DeclareInstance { tasks } { multiplechoice } { default }
diff --git a/Master/texmf-dist/tex/latex/exsheets/tasks.sty b/Master/texmf-dist/tex/latex/exsheets/tasks.sty
index 14981e67db8..b6f2d01eef5 100644
--- a/Master/texmf-dist/tex/latex/exsheets/tasks.sty
+++ b/Master/texmf-dist/tex/latex/exsheets/tasks.sty
@@ -28,8 +28,8 @@
 % If you have any ideas, questions, suggestions or bugs to report, please
 % feel free to contact me.
 % --------------------------------------------------------------------------
-\def\@tasks@date{2013/04/04}
-\def\@tasks@version{0.8a}
+\def\@tasks@date{2013/04/07}
+\def\@tasks@version{0.9}
 
 \RequirePackage { expl3 , xparse , l3keys2e }
 \ProvidesExplPackage
@@ -46,7 +46,7 @@
 
 \int_new:N    \l__tasks_depth_int
 \int_new:N    \g__tasks_int
-\int_new:N    \l__tasks_total_items_int
+\int_new:N    \g__tasks_total_items_int
 \int_new:N    \l__tasks_columns_int
 \int_new:N    \l__tasks_rows_int
 
@@ -55,10 +55,15 @@
 \bool_new:N   \l__tasks_load_tasks_bool
 \bool_new:N   \l__tasks_label_width_bool
 \bool_new:N   \l__tasks_label_offset_bool
+\bool_new:N   \l__tasks_custom_label_bool
+\bool_new:N   \l__tasks_custom_after_item_skip_bool
 
 \tl_new:N     \l__tasks_instance_tl
 \tl_new:N     \l__tasks_label_tl
+\tl_new:N     \l__tasks_custom_label_tl
 \tl_new:N     \l__tasks_label_pattern_tl
+\tl_new:N     \l__tasks_custom_label_pattern_tl
+\tl_new:N     \l__tasks_label_format_tl
 \tl_new:N     \l__tasks_custom_label_format_tl
 \tl_new:N     \l__tasks_item_fill_left_tl
 \tl_new:N     \l__tasks_item_fill_right_tl
@@ -75,6 +80,7 @@
 \dim_new:N    \l__tasks_label_default_offset_dim
 
 \skip_new:N   \l__tasks_after_item_skip
+\skip_new:N   \l__tasks_custom_after_item_skip
 \skip_new:N   \l__tasks_before_list_skip
 \skip_new:N   \l__tasks_after_list_skip
 
@@ -83,13 +89,14 @@
 
 % scratch variables:
 \tl_new:N     \l__tasks_tmpa_tl
-\int_new:N    \l__tasks_tmpa_int
+\int_new:N    \g__tasks_tmpa_int
+\int_new:N    \l__tasks_tmpb_int
 \coffin_new:N \l__tasks_tmpa_coffin
 \coffin_new:N \l__tasks_tmpb_coffin
 \coffin_new:N \l__tasks_tmpc_coffin
 
 % collect the tasks:
-\cs_new:Npn \__tasks_collect_tasks:nw #1#2 \end #3
+\cs_new_protected:Npn \__tasks_collect_tasks:nw #1#2 \end #3
   {
     \tl_put_right:Nn \l__tasks_body_tl { #1 }
     \end { #3 }
@@ -101,37 +108,40 @@
 %  #2: number of columns
 %  #3: item separator
 %  #4: environment body
-\cs_new:Npn \__tasks:nnnn #1#2#3#4
+\cs_new_protected:Npn \__tasks:nnnn #1#2#3#4
   {
     \seq_set_split:Nnn \l__tasks_seq { #3 } { #4 }
     % remove the first (empty) item:
     \seq_pop_left:NN \l__tasks_seq \l__tasks_tmpa_tl
     \tl_if_blank:VF \l__tasks_tmpa_tl
       { \tl_show:N \l__tasks_tmpa_tl \@noitemerr }
-    \int_set:Nn \l__tasks_total_items_int
+    \int_gset:Nn \g__tasks_total_items_int
       { \seq_count:N \l__tasks_seq }
     \UseInstance { tasks } { #1 }
-      { \l__tasks_total_items_int }
+      { \g__tasks_total_items_int }
       { #2 }
-      { \l__tasks_custom_label_format_tl }
+      { \l__tasks_custom_label_pattern_tl }
     % just to be sure:
     \seq_clear:N \l__tasks_seq
   }
 \cs_generate_variant:Nn \__tasks:nnnn { VnnV }
 
-\cs_new:Npn \__tasks_task:nnw #1#2[#3,#4][#5,#6](#7,#8)
+\cs_new_protected:Npn \__tasks_task:nnw #1#2[#3,#4][#5,#6](#7,#8)
   {
     \dim_set:Nn \l__tasks_item_width_dim
       {
         \linewidth / \l__tasks_columns_int -
         \l__tasks_depth_int \l__tasks_item_indent_dim
       }
-    \int_incr:N \l__tasks_tmpa_int
-    \__tasks_set_rows_num:NN
-      \l__tasks_total_items_int
+    \int_gincr:N \g__tasks_tmpa_int
+    \__tasks_gset_rows_num:NN
+      \g__tasks_total_items_int
       \l__tasks_columns_int
-    \int_compare:nT { \l__tasks_tmpa_int > \l__tasks_columns_int }
-      { \int_set:Nn \l__tasks_tmpa_int { 1 } }
+    \int_compare:nT { \g__tasks_tmpa_int > \l__tasks_columns_int }
+      {
+        \int_gset:Nn \g__tasks_tmpa_int { 1 }
+        \int_incr:N \l__tasks_tmpb_int
+      }
     % the item:
     \hcoffin_set:Nn \l__tasks_tmpa_coffin
       {
@@ -155,13 +165,18 @@
       { -\l__tasks_label_width_dim - \l__tasks_label_offset_dim } { 0pt }
     % typeset label & item:
     % need this when a new row starts:
-    \int_compare:nT { \l__tasks_tmpa_int = 1 }
+    \int_compare:nT { \g__tasks_tmpa_int = 1 }
       { \skip_vertical:N \c_zero_skip }
     \skip_horizontal:N \l__tasks_item_indent_dim
     \coffin_typeset:Nnnnn \l__tasks_tmpa_coffin
       { l } { T } { 0pt } { 0pt }
     % need this before a new row starts:
-    \int_compare:nT { \l__tasks_tmpa_int = \l__tasks_columns_int }
+    \bool_if:nT
+      {
+        ( \int_compare_p:n { \g__tasks_tmpa_int = \l__tasks_columns_int } )
+        &&
+        ( \int_compare_p:n { \l__tasks_tmpb_int != \l__tasks_rows_int } )
+      }
       { \skip_vertical:N \l__tasks_after_item_skip }
     \coffin_clear:N \l__tasks_tmpa_coffin
     \coffin_clear:N \l__tasks_tmpb_coffin
@@ -169,7 +184,7 @@
   }
 \cs_generate_variant:Nn \__tasks_task:nnw { VV }
 
-\cs_new:Npn \__tasks_setup:
+\cs_new_protected:Npn \__tasks_setup:
   {
     \dim_set:Nn \parskip { 0pt }
     \skip_set:Nn \parfillskip { 0pt plus 1fil }
@@ -178,14 +193,14 @@
     \strut
   }
 
-\cs_new:Npn \__tasks_set_rows_num:NN #1#2
+\cs_new_protected:Npn \__tasks_gset_rows_num:NN #1#2
   {
-    \int_set:Nn \l__tasks_rows_int { \int_div_truncate:nn { #1 } { #2 } }
+    \int_gset:Nn \l__tasks_rows_int { \int_div_truncate:nn { #1 } { #2 } }
     \int_compare:nNnT { \int_mod:nn { #1 } { #2 } } > { 0 }
-      { \int_incr:N \l__tasks_rows_int }
+      { \int_gincr:N \l__tasks_rows_int }
   }
 
-\cs_new:Npn \__tasks_label_align:n #1
+\cs_new_protected:Npn \__tasks_label_align:n #1
   {
     \clist_if_in:nnTF { left , center , right } { #1 }
       {
@@ -224,9 +239,10 @@
     enumerate       : boolean   = true    ,
     label           : tokenlist           ,
     indent          : length    = 2.5em   ,
-    label-format    : tokenlist = tsk[a]) ,
-    label-width     : length    = 3ex     ,
-    label-offset    : length    = 1ex     ,
+    counter-format  : tokenlist = tsk[a]) ,
+    label-format    : tokenlist ,
+    label-width     : length    = 1em     ,
+    label-offset    : length    = .3333em ,
     after-item-skip : skip      = 1ex plus 1ex minus 1ex
   }
 % the `default' template code:
@@ -235,7 +251,8 @@
     enumerate       = \l__tasks_enumerate_bool           ,
     label           = \l__tasks_label_tl                 ,
     indent          = \l__tasks_item_indent_dim          ,
-    label-format    = \l__tasks_label_pattern_tl         ,
+    counter-format  = \l__tasks_label_pattern_tl         ,
+    label-format    = \l__tasks_label_format_tl          ,
     label-width     = \l__tasks_label_default_width_dim  ,
     label-offset    = \l__tasks_label_default_offset_dim ,
     after-item-skip = \l__tasks_after_item_skip
@@ -254,17 +271,37 @@
           \l__tasks_label_offset_dim
           \l__tasks_label_default_offset_dim
       }
+    \bool_if:NT \l__tasks_custom_after_item_skip_bool
+      {
+        \skip_set_eq:NN
+          \l__tasks_after_item_skip
+          \l__tasks_custom_after_item_skip
+      }
+    \bool_if:NT \l__tasks_custom_label_bool
+      {
+        \tl_set_eq:NN
+          \l__tasks_label_tl
+          \l__tasks_custom_label_tl
+        \bool_set_false:N \l__tasks_enumerate_bool
+      }
     \__tasks_label_align:V \l__tasks_label_align_tl
     % need this for enumerate list:
     \bool_if:nT { !\l__tasks_resume_bool && \l__tasks_enumerate_bool }
       { \int_gzero:N \g__tasks_int }
     \int_set:Nn \l__tasks_columns_int { #2 }
     % set all the items in their own coffins and join with the ground:
-    \int_zero:N \l__tasks_tmpa_int
-    \tl_if_blank:VF \l__tasks_custom_label_format_tl
+    \int_gzero:N \g__tasks_tmpa_int
+    \int_set:Nn \l__tasks_tmpb_int { 1 }
+    \tl_if_blank:VF \l__tasks_custom_label_pattern_tl
       {
         \tl_set_eq:NN
           \l__tasks_label_pattern_tl
+          \l__tasks_custom_label_pattern_tl
+      }
+    \tl_if_blank:VF \l__tasks_custom_label_format_tl
+      {
+        \tl_set_eq:NN
+          \l__tasks_label_format_tl
           \l__tasks_custom_label_format_tl
       }
     \seq_map_inline:Nn \l__tasks_seq
@@ -272,21 +309,22 @@
         \__tasks_read_item:w ##1 \q_stop
         \bool_if:NTF \l__tasks_enumerate_bool
           {
-            \int_gincr:N \g__tasks_int
-            \tl_if_blank:VT \l__tasks_label_tl
+            \tl_if_eq:VnT \l__tasks_tmp_label_tl { @tasks@default@label@ }
               {
-                \tl_set:Nn \l__tasks_label_tl
-                  {
-                    \ReadCounterPatternFrom [ tasks ]
-                      \l__tasks_label_pattern_tl
-                  }
+                \int_gincr:N \g__tasks_int
+                \SaveCounterPatternFrom [ tasks ]
+                  \l__tasks_tmpa_tl
+                  \l__tasks_label_tl
+                  \l__tasks_label_pattern_tl
+                \cs_gset:Npx \@currentlabel { \l__tasks_label_tl }
               }
           }
           {
             \tl_if_blank:VT \l__tasks_label_tl
               { \tl_set_eq:NN \l__tasks_label_tl \labelitemi }
           }
-        \tl_if_blank:VTF \l__tasks_tmp_label_tl
+        \tl_put_left:NV \l__tasks_label_tl \l__tasks_label_format_tl
+        \tl_if_eq:VnTF \l__tasks_tmp_label_tl { @tasks@default@label@ }
           {
             \__tasks_task:VVw
               \l__tasks_label_tl
@@ -302,18 +340,21 @@
           }
       }
   }
+\cs_generate_variant:Nn \tl_if_eq:nnTF { V }
+\cs_generate_variant:Nn \tl_if_eq:nnT { V }
 
 \cs_new:Npn \__tasks_read_item:w
   {
     \peek_meaning:NTF [
       { \__tasks_read_item_aux:w }
-      { \__tasks_read_item_aux:w[] }
+      { \__tasks_read_item_aux:w[@tasks@default@label@] }
   }
 
-\cs_new:Npn \__tasks_read_item_aux:w [#1]#2 \q_stop
+\cs_new_protected:Npn \__tasks_read_item_aux:w [#1]#2 \q_stop
   {
-    \tl_if_blank:nF { #1 }
-      { \tl_set:Nn \l__tasks_tmp_label_tl { #1 } }
+    \tl_set:Nn \l__tasks_tmp_label_tl { #1 }
+    \tl_if_eq:nnF { #1 } { @tasks@default@label@ }
+      { \tl_put_left:NV \l__tasks_tmp_label_tl \l__tasks_label_format_tl }
     \tl_set:Nn \l__tasks_item_tl { \ignorespaces #2 }
   }
 
@@ -328,7 +369,7 @@
 \dim_new:N  \l__tasks_choice_raise_dim
 \dim_set:Nn \l__tasks_choice_raise_dim { .1ex }
 
-\cs_new:Npn \tasks_choice:
+\cs_new_protected:Npn \tasks_choice:
   {
     \leavevmode
     \bool_set_false:N \l__tasks_choice_checked_bool
@@ -337,7 +378,7 @@
       { \hbox:n { \__tasks_choice: } }
   }
 
-\cs_new:Npn \tasks_choice_checked:
+\cs_new_protected:Npn \tasks_choice_checked:
   {
     \leavevmode
     \bool_set_true:N \l__tasks_choice_checked_bool
@@ -346,7 +387,7 @@
       { \hbox:n { \__tasks_choice: } }
   }
 
-\cs_new:Npn \__tasks_choice:
+\cs_new_protected:Npn \__tasks_choice:
   {%
     \dim_set:Nn \unitlength { .1\l__tasks_choice_width_dim }
     \begin{picture}(10,0)
@@ -370,18 +411,25 @@
 
 \keys_define:nn { tasks / list }
   {
-    style        .tl_set:N   = \l__tasks_instance_tl ,
-    label        .tl_set:N   = \l__tasks_custom_label_format_tl ,
-    label-width  .code:n     =
+    style           .tl_set:N   = \l__tasks_instance_tl ,
+    counter-format  .tl_set:N   = \l__tasks_custom_label_pattern_tl ,
+    label           .code:n     =
+      \bool_set_true:N \l__tasks_custom_label_bool
+      \tl_set:Nn \l__tasks_custom_label_tl { #1 } ,
+    label-format    .tl_set:N   = \l__tasks_custom_label_format_tl ,
+    label-width     .code:n     =
       \dim_set:Nn \l__tasks_label_width_dim { #1 }
       \bool_set_true:N \l__tasks_label_width_bool ,
-    label-offset .code:n     =
+    label-offset    .code:n     =
       \dim_set:Nn \l__tasks_label_offset_dim { #1 }
       \bool_set_true:N \l__tasks_label_offset_bool ,
-    label-align  .tl_set:N   = \l__tasks_label_align_tl ,
-    before-skip  .skip_set:N = \l__tasks_before_list_skip ,
-    after-skip   .skip_set:N = \l__tasks_after_list_skip ,
-    resume       .bool_set:N = \l__tasks_resume_bool
+    label-align     .tl_set:N   = \l__tasks_label_align_tl ,
+    before-skip     .skip_set:N = \l__tasks_before_list_skip ,
+    after-skip      .skip_set:N = \l__tasks_after_list_skip ,
+    after-item-skip .code:n     =
+      \bool_set_true:N \l__tasks_custom_after_item_skip_bool
+      \skip_set:Nn \l__tasks_custom_after_item_skip { #1 } ,
+    resume          .bool_set:N = \l__tasks_resume_bool
   }
 
 % the generic environment:
@@ -404,6 +452,20 @@
     \skip_vertical:N \l__tasks_after_list_skip
   }
 
+% command to start a new row:
+\cs_new_protected:Npn \tasks_new_row:
+  {
+    \int_gset:Nn \g__tasks_total_items_int
+      { \g__tasks_total_items_int + \l__tasks_columns_int - \g__tasks_tmpa_int }
+    \__tasks_gset_rows_num:NN
+      \g__tasks_total_items_int
+      \l__tasks_columns_int
+    \int_gset_eq:NN \g__tasks_tmpa_int \l__tasks_columns_int
+  }
+
+\NewDocumentCommand \startnewitemline {}
+  { \tasks_new_row: }
+
 % the user environment:
 \NewDocumentCommand \NewTasks { O{}mO{\task}D(){1} }
   {
@@ -436,7 +498,7 @@
       { \input { tasks.cfg } }
   }
 
-\cs_new:Npn \tasks_setup:n #1
+\cs_new_protected:Npn \tasks_setup:n #1
   { \keys_set:nn { tasks / list } { #1 } }
 
 \NewDocumentCommand \settasks { m }
diff --git a/Master/texmf-dist/tex/latex/exsheets/translations.sty b/Master/texmf-dist/tex/latex/exsheets/translations.sty
index 03cf81c8169..fbd5976d838 100644
--- a/Master/texmf-dist/tex/latex/exsheets/translations.sty
+++ b/Master/texmf-dist/tex/latex/exsheets/translations.sty
@@ -29,8 +29,8 @@
 % If you have any ideas, questions, suggestions or bugs to report, please
 % feel free to contact me.
 % --------------------------------------------------------------------------
-\def\@trnslt@date{2013/04/04}
-\def\@trnslt@version{v0.8a}
+\def\@trnslt@date{2013/04/08}
+\def\@trnslt@version{v0.9a}
 
 \ProvidesPackage{translations}[\@trnslt@date\space \@trnslt@version\space a simple translator]
 \RequirePackage{etoolbox}
@@ -112,7 +112,6 @@
     {}%
   \csletcs{@trnslt@language@#1}{@trnslt@language@#2}}
 
-% TODO: nur eine Notlösung bis es eine echte gibt:
 % #1: dialect
 % #2: language
 \newrobustcmd*\DeclareLanguageDialect[2]{%
@@ -213,10 +212,11 @@
         {\csuse{@trnslt@word@#1@\@trnslt@language{#2}}}%
     }
     {%
-      \@trnslt@warning{Translation for `#1' in #2 unknown.}%
+      \@trnslt@warning{Translation for `#1' in #2 unknown. You may try to use
+        \string\DeclareTranslation{#2}{#1}{ ... } in your preamble.}%
       \@trnslt@if@translation{#1}{fallback}
         {%
-          \@trnslt@warningnoline{Using fallback translation for `#1'}%
+          \@trnslt@info{Using fallback translation for `#1'}%
           \csuse{@trnslt@word@#1@fallback}
         }%
         {\csuse{@trnslt@word@#1@literal}}%