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scheme
Values are printed in a format matching the Scheme programming language,
as if using display. "Groups" or "elements" are written as lists.
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readable-scheme
Like scheme, as if using write:
Values are generally printed in a way that they can
be read back by a Scheme reader. For example, strings have quotation marks,
and character values are written like ‘#\A’.
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elisp
Values are printed in a format matching the Emacs Lisp programming language.
Mostly the same as scheme.
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readable-elisp
Like elisp, but values are generally printed in a way that they can
be read back by an Emacs Lisp reader. For example, strings have quotation
marks, and character values are written like ‘?A’.
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clisp
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commonlisp
Values are printed in a format matching the Common Lisp programming language,
as if written by princ.
Mostly the same as scheme.
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readable-clisp
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readable-commonlisp
Like clisp, but as if written by prin1: values are generally
printed in a way that they can be read back by a Common Lisp reader.
For example, strings have quotation marks, and character values are
written like ‘#\A’.
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xml
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xhtml
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html
Values are printed in XML, XHTML, or HTML format.
This is discussed in more detail in Formatting XML.
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cgi
The output should follow the CGI standards. I.e. assume that this
script is invoked by a web server as a CGI script/program, and that the
output should start with some response header,
followed by the actual response data.
To generate the response headers, use the response-header function.
If the Content-type response header has not been specified, and
it is required by the CGI standard, Kawa will attempt
to infer an appropriate Content-type depending on the following value.
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ignore
Top-level values are ignored, instead of printed.
