1. A method of document content analysis for identifying non-similar content from a text data collection, wherein the method comprises: receiving the two or more text documents defining the text data collection, wherein each of the text documents comprises a plurality of terms, and wherein at least two of the text documents comprise similar content; identifying the non-similar content of the received text documents; and generating results based at least partly on the non-similar content of the received text documents, wherein generating results comprises presenting a display identifying the non-similar content of the text documents.