<u>

An underline, also called an underscore, is a line immediately below a portion of text.

Rendering expectations

The content of the <u> element is typically underlined.

Specialization hierarchy

The <u> element is specialized from <ph>. It is defined in the highlighting-domain module.

Content model

(Text | <cite> | <include> | <keyword> | <ph> | <strong> | <em> | <b> | <i> | <line-through> | <overline> | <sup> | <sub> | <tt> | <u> | <q> | <term> | <text> | <tm> | <xref> | <data> | <sort-as> | <draft-comment> | <foreign> | <required-cleanup> )*

Attributes

The following attributes are available on this element: universal attributes and @keyref.

The following attributes are available on this element: universal attributes and the attributes defined below.

@keyref
Specifies a key name that acts as a redirectable reference based on a key definition within a map. See The keyref attribute for information on using this attribute.

For HDITA, the equivalent of @keyref is @data-keyref

Example

This section is non-normative.

The following code sample shows underlining used to provide emphasis in a marketing blurb, without giving any extra meaning to the underlined phrase:

<p>Using our patented <u>SuperFast BitSpeed Technology</u>, our product
will answer all of your questions only a few nanoseconds after you ask!</p>