DITA For Publishers Vocabulary Reference eqn_block eqn_block is for a block-level equation. The equation (and possibly the equation identifier, such as a number) is the only content in the block. eqn_block is a specialization of p. It can contain MathML. Inheritance + topic/p d4p-formatting-d/eqn_block <p>The following equation is an example of arithmetic.</p> <eqn_block>2 + 2 = 4</eqn_block>Figure 8. Sample of an instance of the eqn_block element