StructuredCommandType --------------------- This type structures an empty stub which is used as the basis for extensions added using external namespaces such as MathML. The DDI 3.0 extension methodology is used here - a new module is declared, and the StructuredCommand element is used as the head of a substitution group to insert whatever XML is needed to express the command. Properties ~~~~~~~~~~ This type contains no properties. Relationships ~~~~~~~~~~~~~ The following types reference this type. * :doc:`/composite-types/CommandCodeType/index` .. container:: image |stub| .. |stub| image:: ../../images/StructuredCommandType.svg