[TYPO3] indexing limited by <!--TYPO3SEARCH_begin--> error

[Tomasz Rakowski]

Hello!

I am using typo3 3.8.1 and indexed search engine 2.1.3

I do not know why information from following meta tags gets indexed:
meta name="description"
meta name="keywords"

When I type in a word which is on that meta keywords list I get all 
sites listed with description like this:
Site name, Keywords, Content

I am not sure if is important, but I also use meta 
name="DC.Description", meta name="DC.Subject" tags.

I do not want meta tags get indexed and I know that indexing works 
somehow correctly because it doesn't index ie. menu items or navigation 
path which are beyond <!--TYPO3SEARCH_begin--> and <!--TYPO3SEARCH_end-->


Looking forward to getting some support

Tomek