The <em> tag is used for indicating emphasis. The text inside this tag is more important than flat text. The text displayed using the <em> tag looks italic. The example below shows how the <em> tag works:
Emphasis <em>Emphasis</em> Emphasis
then after calculation the result appearing in the report will be:
Emphasis Emphasis Emphasis
If a tag is not closed then the formatting is applied to from the opening tag to the end of the text expression.