The complete list of MathML entities is described in Chapter 6. The MathML specification uses a number of technical terms to describe MathML-specific rules and conventions. The most notable example is the attribute value notations and conventions described in Section 2.3.3 . The remainder of this section introduces MathML-specific terminology and conventions used in this chapter. The presentation elements are divided into two classes.
Token elements represent individual symbols, names, numbers, labels, etc.
There are also a few empty elements used only in conjunction with certain layout schemata. In MathML, expressions are constructed in the same way, with the layout schemata playing the role of the expression constructors. The layout schemata specify the way in which subexpressions are built into larger expressions. The presentation elements are the MathML elements defined in the chapter. These elements are listed in Section 3.1.5 .