Information sharing between SE's

Who supplies who?

[denisl]

I have seen diagrams on the web showing which search engines supply information for others but as this is constantly changing, can anyone point me towards an up to one that is known to be up to date?

[Marcia]

About as up to date as it gets:

Search Engine Relationship Chart [webmasterworld.com]

[denisl]

Thank you - thought it must be here somewhere!