It is possible that documents may be classified into types on the basis of their common characteristics. Texts and their interpretation. State University of New York Press. The meaning of a text might be interpreted in author's terms, reader's terms, by its historical place, or contemporarily. The case for argumentational analysis in information retrieval.
Texts tend to have some rhetorical or argument structure.
Concepts of warrant in bibliographic classification systems. Warrant is the justification that serves as the basis for a classification system.