I have read this which claims that the listed search engines are not able to show the unlinked doc&XML in its results. My questions are
Have any one else experimented like this? This information seems old, does these engines are learned to crawl them too?
Any updates on these. Thank you.
I have seen other duplicate questions which are not answering my question.
1) My question is about any experiments have been carried after 2008. 2) the question quoted for duplicate doesn't provide any reference to the questions asked by that questions OP. 3) I have mentioned that I have read them.and not answering my questions