It is worth to mention that NLD is similar to Plagiarism Detection and Paraphrase Detection (PD) as all these tasks aim to capture similar sentences with the same meaning (Das and Smith, 2009).
the goal of authors in plagiarism and paraphrasing is to change as many words as possible to increase the differences between texts, whereas in technical writing, the authors try to avoid such differences, but they do not always succeed and thus NLD solutions are needed.