Short sūtra or tantra texts used mainly for ritual purposes, mostly structured around a dhāraṇī formula in Sanskrit, its uses and the story of its origin.
The collection of dhāraṇī in two subdivisions: 250 dhāraṇī texts themselves, and a small group of 15 dedication and aspiration prayers (Toh 846–1108). See further details about these sections in the following Knowledge Base articles: