Keyword analysis (KWA) and keymorph analysis (KMA) are two corpus-based methods for analyzing text and discourse. Both methods, each operating on a different language level, facilitate text interpretation by identifying prominent units on the backdrop of reference corpus.

KWA is one of the most widely used data-driven methods of identifying prominent words (keywords [KWs]) in a text or discourse. It is based on an assumption that each text prefers one sort of expressions over others and that these preferred expressions are usually m…