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HTML 5 <dfn> Tag

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The HTML <dfn> tag is used for indicating a definition. The <dfn> tag surrounds the word/term being defined.

Note: Although this element has no element-specific attributes, the title attribute has special semantics for this element. If the <dfn> tag has a title attribute, then the exact value of that attribute is the term being defined.

Example

Here are two examples of <dfn> usage. The second example demonstrates how to use the <dfn> tag in conjunction with the <abbr> tag.

Source CodeResult

Attributes

HTML tags can contain one or more attributes. Attributes are added to a tag to provide the browser with more information about how the tag should appear or behave. Attributes consist of a name and a value separated by an equals (=) sign, with the value surrounded by double quotes. Here's an example, style="color:black;".

There are 3 kinds of attributes that you can add to your HTML tags: Element-specific, global, and event handler content attributes.

The attributes that you can add to this tag are listed below.

Element-Specific Attributes

The following table shows the attributes that are specific to this tag/element.

AttributeDescription
None, but the title attribute has special semantics for this element. If the <dfn> tag has a title attribute, then the exact value of that attribute is the term being defined.

Global Attributes

The following attributes are standard across all HTML 5 tags.

class id style
contenteditable irrelevant tabindex
contextmenu lang template
dir ref title
draggable registrationmark  

For a full explanation of these attributes, see HTML 5 global attributes.

Event Handler Content Attributes

Event handler content attributes enable you to invoke a script from within your HTML. The script is invoked when a certain "event" occurs. Each event handler content attribute deals with a different event.

Here are the standard HTML 5 event handler content attributes.

onabort ondragover onmousemove
onbeforeunload ondragstart onmouseout
onblur ondrop onmouseover
onchange onerror onmouseup
onclick onfocus onmousewheel
oncontextmenu onkeydown onresize
ondblclick onkeypress onscroll
ondrag onkeyup onselect
ondragend onload onstorage
ondragenter onmessage onsubmit
ondragleave onmousedown onunload

For a full explanation of these attributes, see HTML 5 event handler content attributes.

Also see the HTML 4.01 tags


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