Take into account please ZBXNEXT-1592
looks like this will also solve :
Fixed in development branch svn://svn.zabbix.com/branches/dev/ZBXNEXT-1653
(1) Documentation should be updated according to the specifications (http://www.zabbix.org/wiki/Docs/specs/ZBXNEXT-1653)
wiper item documentation updated.
zalex_ua sorry, it's not very clear to me what:
start line - the first line to match. Defaults to the first line of file.
The start line parameter is supported from version 2.2.
end line - the last line to match. Defaults to the last line of file.
The end line parameter is supported from version 2.2.
mean ?
Does it mean a line number ?
Also I'd simplify (and modify) that text to:
start line - the first line number to search match. Defaults is the first line of file.
end line - the last line number to search match. Defaults is the last line of file.
output - ...
Parameters start line, end line, output supported from version 2.2
and so on for other affected keys
wiper yes. line number. Updated according to suggestion.
wiper apparently CLOSED
Successfully tested. Please review my changes in r34880 and r34888.
Available in version pre-2.1.0 (trunk) r34892.
Could you please review the documentation changes (and updated if I've missed anything).
martins-v It looks to me like adding examples here is necessary (in comment column for vfs.file.regexp, web.page.regexp, log, logrt) - the examples could show a fairly simple item key (with output specified) and then say what will be returned by Zabbix. Or the existing examples could be expanded/improved.
zalex_ua Martins, also, this page https://www.zabbix.com/documentation/2.2/manual/config/items/itemtypes/log_items also contains some examples. I think you could estimate where it could be better to store examples, I don't like the fact that two different pages have examples (different ones, btw). I'd remove examples from the page I mentioned and just would leave them on a keys list page only, existing internal link there is enough.
martins-v OK, I've moved all the existing log/logrt examples into the agent item list.
wiper ideally every key would have own page with detailed description. Such pages could be better formatted and much easier to maintain. I'll try adding more examples to the table, will see if it's readable.
martins-v I've reworked the descriptions for 'vfs.file.regexp' a bit at https://www.zabbix.com/documentation/2.2/manual/config/items/itemtypes/zabbix_agent. The idea is to make things as easy to understand for the users as possible.
I'm sure this deserves a blog post. This is the big thing, first time in Zabbix a regex substitution is introduced.
zalex_ua I'd say more - it requires a blog post 
<richlv> http://blog.zabbix.com/zabbix-2-2-features-part-7-value-extracting-from-logfiles-and-more/
(2) whatsnew is missing all info about these changes
martins-v For review: https://www.zabbix.com/documentation/2.2/manual/introduction/whatsnew220#ability_to_extract_matching_part_of_a_regular_expression
wiper Looks good, though I'm not sure it's worth listing vfs.file.regmatch[] along with the other keys, as it does not have the output parameter (only start/end line parameters were added). Maybe it should be just mentioned at the end as related change (similarly it was done with EOF returning changes).
martins-v vfs.file.regmatch[] is now split out as a related change.
wiper great, CLOSED
(3) ChangeLog entry is missed
wiper RESOLVED in r39918
CLOSED
I believe this is an issue which should be fixed.
Reopening.
zalex_ua sorry, wrong issue number, closed again