regular expressions in XMATCH and XLOOKUP

[Regina Henschel]

Hi all, hi Balázs,

yesterday the ODF TC had a call with guests from Microsoft, Excel 
experts. They told us, that they are going to implement regular 
expression search for XMATCH and XLOOKUP in a way that they introduce a 
a value "3" for parameter Match_mode. The ODF TC will follow that in the 
specification of these functions and at the same time specify, that the 
host dependent properties HOST-USE-REGULAR-EXPRESSIONS and 
HOST-USE-WILDCARDS (file format table:use-regular-expressions and 
table:use-wildcards) will be ignored by these functions.

I think it is a good idea to make the function results independent from 
global settings.

I suggest to change our implementation of XLOOKUP and XMATCH 
immediately. In case that will not be possible for version 24.8., add a 
warning to the release notes, that the functions are experimental and 
the exact syntax and behavior might be changed in a later version.

Kind regards,
Regina