Lastly thesauri list not only equivalent terms but also narrower, broader terms and related terms among various authorized and non-authorized terms, while historically most subject headings did not.
The collections are held under the following headings: social history, science and technology, maritime, land transport, fine art, decorative and applied art, archives and archaeology.
His "doubts" are collected under five headings: vocabulary, phrases and collocations, grammatical constructions, clarity, and stylistic consistency, in each case setting literary quotations under scrutiny.
