XSLT functions

XSLT adds 19 functions to XPath. Several make no sense because they rely
on XSLT instructions:

current()
current-group()
current-grouping-key()
element-available()
function-available()
key()
regex-group()

A few we can easily do without because we have our own mechanisms
(or we already support them):

document()
system-property()

That leaves these:

format-date()
format-dateTime()
format-number()
format-time()
generate-id()
type-available()
unparsed-entity-public-id()
unparsed-entity-uri()
unparsed-text()
unparsed-text-available()

On balance, I think we should say that they're all forbidden.
Even in XSLT Match patterns?

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <ndw@nwalsh.com> | One does what one is; one becomes what
http://nwalsh.com/            | one does.--Robert Musil