\Gls{mTask}-\glspl{SDS} on a client are available on the server as in the form
of regular \gls{iTasks}-\glspl{SDS}. However, the same freedom that an
\gls{SDS} has in the \gls{iTasks}-system is not given for \glspl{SDS} that
reside on the client. Not all types are suitable to be located on a client,
simply because it needs to be representable on clients. Also, not all \gls{SDS}
types are possible to have on a device. Moreover, \glspl{SDS} behave a little
different in an \gls{mTask} device compared to in the \gls{iTasks} system. In
an \gls{iTasks} system, when the \gls{SDS} is updated, a broadcast to all
watching \glspl{Task} in the system is made to notify them of the update.
\glspl{SDS} can update often and the update might not be the final value it
will get. Implementing the same functionality on the \gls{mTask} client would
result in a lot of expensive unneeded bandwidth usage. Therefore a device must
publish the \gls{SDS} explicitly to save bandwidth. Note that this means that
the \gls{SDS} value on the device can be different compared to the value of the
same \gls{SDS} on the server.

To add this functionality, the \CI{sds} class could be extended. However, this
would result in having to update all existing views that use the \CI{sds}
class. Therefore, an extra class is added that contains the extra
functionality. Programmers can choose to implement it for existing views in the
future but are not obliged to. The publication function has the following
signature:
\begin{lstlisting}[caption={The \texttt{sdspub} class}]
class sdspub v where
  pub :: (v t Upd) -> v t Expr | type t
\end{lstlisting}

Moreover, \glspl{SDS} in the \gls{mTask}-\gls{EDSL} are always anonymous. There
is no way of labeling it since it is not a real entity, it is just a function.
When a \gls{SDS} is sent to the device it must be retrievable and identifiable.
It is not always clear which instantiated \gls{SDS} is which. Therefore, an
added class named \CI{namedsds} is added that provides the exact same
functionality as the \gls{SDS} class but adds a \CI{String} parameter that can
later be used to identify a \gls{SDS}. The types for this class are as follows:

\begin{lstlisting}[caption={The \texttt{namedsds} class}]
class namedsds v where
  namedsds :: ((v t Upd)->In (Named t String) (Main (v c s))) -> (Main (v c s)) | type, mTaskType, toCode t
:: Named a b = Named infix 1 a b
\end{lstlisting}
