Considering IFERROR function

Hi,

As already pointed out on the comment list, for some occasions an
IFERROR(expression;errorcase) does come handy. The function evaluates
'expression' as usual, and if that results in an error returns the
result of an 'errorcase' expression, otherwise the result of
'expression'. Also ECMA/MOOXML defines this function.

I propose to include IFERROR in our ODFF specification.

  Eike

-- 
Automatic string conversions considered dangerous. They are the GOTO statements
of spreadsheets.  --Robert Weir on the OpenDocument formula subcommittee's list.