Voice type and below the countertenor voice. The "leggero" tenor has the highest tessitura of all the tenor subtypes. Tenor subtypes: Tenors are often divided into different subcategories based on range, vocal color or timbre, the weight of the voice, and dexterity of the voice. Tenors are often broken down into seven subcategories: "tenore contraltino", "leggero" tenor or "tenore di grazia", lyric tenor, spinto tenor or "tenore spinto", dramatic tenor, heldentenor, and baritenor. Famous tenors include Enrico Caruso, Juan Diego Flórez, Alfredo Kraus, and Luciano Pavarotti. Baritone range: The baritone voice is the middle-range voice type for males; it lies between the
Terminology model an object-oriented database schema, is can be transformed without loss of information into an object-oriented database schema. Thus, the terminology model is a method for problem analysis on the one side and a mean of defining database schema on the other side. Several terminology models have been developed and published in the field of statistics: Terminology model A terminology model is a refinement of a concept system. Within a terminology model the concepts (object types) of a specific problem or subject area are defined by subject matter experts in terms of concept (object type) definitions and definitions of subordinated concepts