22.1.2.32 e (Element

This tag, which is an abbreviation for “element”, serves several functions (18 total) including that of the base argument of a mathematical object or function, the elements in an array, and the elements in boxes. If all subelements are omitted, this element specifies the presence of an empty argument. [Example: The numerator

of this function is an empty argument: . end example] [Note: The tag was shortened to e to improve readability 2 over “element”. “Element” was preferred over “Base” because “Element” sounded more neutral and appropriate to its multiple uses. end note]

The following table shows the 18 different uses for e:

Parent Element

Use

Accent base argument

Parent Element

Use

Argument to which the bar is applied

Argument around which the border box is drawn

Argument inside the abstract box

Argument inside the delimiters

Each instance of mathematical text in the single-column array

Math argument list of the function

Group character base

Base of the lower limit

Base of the upper limit

Each element in the matrix row

n-ary and, e.g., integrand for an integral, summand for a summation

Argument for the phantom

Radicand

Base of the prescript object

Base of the subscript object

Base of the subsup object

Base of the superscript object

[Example: For example, the func sin𝑥 has fName sin and e x:

<m:func>
  <m:fName>
    <m:r>
      <m:t>sin</m:t>
    </m:r>
  </m:fName>
  <m:e>
    <m:r>
      <m:t>x</m:t>
    </m:r>
  </m:e>
</m:func>
_end example_]

[Note: The W3C XML Schema definition of this element’s content model (CT_OMathArg) is located in A.6.1. end note]