I am interested in the problem of extracting key phrases from a text corpus. This is different from the keyword extraction problem, which is only for a particular document. This problem helps us, for example, to construct a domain-specific dictionary/taxonomy/ontology from that domain's set of documents.
I can only find some old research papers, like 20 years ago, on this problem. I would like to know if there are any recent research work? What are the best or most popular methods on this problem? Thanks.