Hi,
I use Sweave extensively in my consulting work. When submitting reports to
the scientists I work
with I like to use the citation function to reference any packages I use, to
give proper acknowledgement.
I noted in the documentation that a  citation inherits from bibentry, and
indeed,
>  citr<- citation()
> class(citr)
[1] "citation" "bibentry"

However, following this line I would assume citation should fully inherit
the methods of bibentry. But that is not the case,
> print(citr, style="latex")
still gives style='citation'

> utils:::print.citation
function (x, ...)
{
    NextMethod("print", x, style = "citation")
    invisible(x)
}
<environment: namespace:utils>

The citation print style is hard coded. Of course a workaround is,
class(citr) <- 'bibentry'
but I think it would be better if print inherited all bibentry methods,
something like

print.citation <- function (x, style="citation" ...)
{
    NextMethod("print", x, style = style, ...)
    invisible(x)
}

Then the default is still printing a citation, but other print methods are
available.

Thanks
Nicholas

-- 
"The bear and the goat were married and lived together until the end of
their days. Either the goat went mad or the bear became sane."

Nicholas Lewin-Koh
Genentech

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