add connection diagrams and add todo combinators

[msc-thesis1617.git] / methods.top.tex

diff --git a/methods.top.tex b/methods.top.tex
index c479f49..3acfb17 100644 (file)
--- a/methods.top.tex
+++ b/methods.top.tex
@@ -1,9 +1,9 @@
 \section{iTasks}
-\gls{TOP} is a recent programming paradigm implemented as
+\gls{TOP} is a modern recent programming paradigm implemented as
 \gls{iTasks}\cite{achten_introduction_2015} in the pure lazy functional
 language \gls{Clean}\cite{brus_cleanlanguage_1987}. \gls{iTasks} is a
-\gls{EDSL} to model workflow tasks in the broadest sense. A \CI{Task} is just
-a function that, given some state, returns the observable \CI{TaskValue}. The
+\gls{EDSL} to model workflow tasks in the broadest sense. A \gls{Task} is just
+a function that --- given some state --- returns the observable \CI{TaskValue}. The
 \CI{TaskValue} of a \CI{Task} can have different states. Not all state
 transitions are possible as shown in Figure~\ref{fig:taskvalue}. Once a value
 is stable it can never become unstable again. Stability is often reached
@@ -19,7 +19,7 @@ image in the \CI{NoValue} state, the second image does not have all the fields
 filled in and therefore the \CI{TaskValue} remains \CI{Unstable}. In the third
 image all fields are entered and the \CI{TaskValue} transitions to the
 \CI{Unstable} state. When the user presses \emph{Continue} the value becomes
-\CI{Stable} and can not be changed any further.
+\CI{Stable} and cannot be changed any further.
 
 \begin{figure}[H]
        \centering
@@ -42,6 +42,7 @@ enterName = enterInformation "Enter your name" []
 \end{lstlisting}
 
 \begin{figure}[H]
+       \centering
        \begin{subfigure}{.25\textwidth}
                \centering
                \includegraphics[width=.9\linewidth]{taskex1}
@@ -60,24 +61,26 @@ enterName = enterInformation "Enter your name" []
        \caption{Example of a generated user interface}
 \end{figure}
 
-For a type to be suitable it must have instances for a collection of generic
-functions that are captured in the class \CI{iTask}. Basic types have
+For a type to be suitable, it must have instances for a collection of generic
+functions that is captured in the class \CI{iTask}. Basic types have
 specialization instances for these functions and show an according interface.
 Generated interfaces can be modified with decoration operators.
 
 \section{Combinators}
+\todo{check and refine}
 \Glspl{Task} can be combined using so called \gls{Task}-combinators.
 Combinators describe relations between \glspl{Task}. \Glspl{Task} can be
 combined in parallel, sequenced and their result values can be converted to
-\glspl{SDS}. Moreover, a very important combinator is the step combinator that
-starts a new task according to the \CI{TaskValue}. The type signatures of the
-basic combinators are shown in Listing~\ref{lst:combinators}.
+\glspl{SDS}. Moreover, a very important combinator is the step combinator which
+starts a new task according to specified predicates on the \CI{TaskValue}.
+Type signatures of the basic combinators are shown in
+Listing~\ref{lst:combinators}.
 
 \begin{itemize}
        \item Step:
 
                The step combinator is used to start \glspl{Task} when a predicate on
-               the \CI{TaskValue} holds or an action has been taken place. The bind
+               the \CI{TaskValue} holds or an action has taken place. The bind
                operator can be written as a step combinator.
                \begin{lstlisting}[language=Clean]
 (>>=) infixl 1 :: (Task a) (a -> (Task b)) -> (Task b) | iTask a & iTask b
@@ -116,7 +119,7 @@ basic combinators are shown in Listing~\ref{lst:combinators}.
 (-&&-) infixr 4 :: (Task a) (Task b)              -> Task (a,b) | iTask a & iTask b
 \end{lstlisting}
 
-\section{\acrlongpl{SDS}}
+\section{Shared Data Sources}
 \Glspl{SDS} are an abstraction over resources that are available in the world
 or in the \gls{iTasks} system. The shared data can be a file on disk, it can be
 the time, a random integer or just some data stored in memory. The actual