Systems and Methods for Keyword Determination and Document Classification from Unstructured Text

In various embodiments, documents are searched and retrieved via receipt of a search query, electronically identifying a reference set of relevant documents, providing a search set of documents, creating a database comprising at least some of the documents of the search set and the reference set , computationally classifying the documents in the database , extracting keywords from the search set and one or more classified sets , optionally filtering the extracted keywords, and electronically identifying at least some of the documents from the database that contain one or more of the extracted keywords.