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\name{representation}
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\name{representation}
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\alias{representation}
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\alias{representation}
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\alias{prototype}
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\alias{prototype}
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\title{ Construct a Representation or a Prototype for a Class Definition}
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\title{ Construct a Representation or a Prototype for a Class Definition}
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\description{
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\description{
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  In calls to
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  These are old utility functions  to construct, respectively
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  \code{\link{setClass}}, these two functions construct,
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  a list designed to represent the slots and superclasses and
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  respectively, the \code{representation} and \code{prototype}
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  a list of prototype specifications.  The \code{representation()}
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  arguments.  They do various checks and handle special cases.  You're
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  function is no longer useful, since the arguments \code{slots} and
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  encouraged to use them when defining classes that, for
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  \code{contains} to \code{\link{setClass}} are now recommended.
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  example, extend other classes as a data part or have multiple
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  The \code{prototype()} function may still be used for the
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  corresponding argument, but a
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  superclasses, or that combine extending a class and slots.
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  simple list of the same arguments works as well.
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}
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}
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\usage{
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\usage{
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representation(...)
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representation(...)
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prototype(...)
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prototype(...)
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}
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}