On 16 Oct 2013, at 21:01, Costello, Roger L. wrote:
> Hi Folks,
>
> [Definition]
> A quine is a computer program which takes no input
> and produces a copy of its own source code as its only
> output. The standard terms for these programs in the
> computability theory and computer science literature
> are self-replicating programs, self-reproducing programs,
> and self-copying programs. [1]
>
> Below is an XSLT program that is quine.
Not on that definition it isn't. It calls the document() function, so it can't claim to "take no input". A program that copies its input, and is then run on itself, is not an interesting quine.
Michael Kay
Saxonica
