Text and data mining (TDM) are often used together although they are slightly different. Both use computational analysis of vast quantities of digital information. However text mining looks more at natural language text and data mining at structured data.
Researchers use specialized tools to extract data, identify trends, look for patterns and better understand the relationships of terms within and between documents. Analysis might focus on word frequency, words that frequently appear near each other, contextual information for key words, common phrases and other patterns.
Analyzes can happen from websites (such as publicly available Facebook posts), to 16th C. manuscripts, to DNA sequences, as well as old newspapers