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MathML Basic Elements

The most basic elements of MathML are: mrow, mi, mo and mn.

Index Elements Descriptions
1) <mrow> element The MathML <mrow> element is used to group any number of sub expressions horizontally.
2) <mi> element The MathML <mi> element is used to specify an identifier.
3) <mo> element The MathML <mo> element is used to specify an operator in a broad sense.
4) <mn> element The MathML <mn> element is used to specify a numeric literal.

For example: To write x + y = 5, the equivalent MathML code are:

<mrow> element:

The MathML <mrow> element is used to group any number of sub expressions horizontally.

<mi> element:

The MathML <mi> element is used to specify an identifier. For example: the name of a variable, a constant, a function, etc.

It automatically renders the identifier using an italic font, if the identifier is one character long; otherwise the name is rendered using a normal, upright font.

<mo> element:

The MathML <mo> element is used to specify an operator in a broad sense. For example: addition operator '+', a fence operator '{' or a separator ','

The appropriate amount of space is added on the left and on the right of an <mo> element depending on the textual contents of this element.

For example: if in the above expression you replace <mo>+</mo> by <mo>,</mo>, this will suppress the space at the left of the mo element.

<mn> element:

The MathML <mn> element is used to specify a numeric literal.

For example: PI should be specified as <mi>PI</mi> and not as <mn>PI</mn> while 3.14 should be specified as <mn>3.14</mn> and not as <mi>3.14</mi>.





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