It is used for acronyms. xml:lang attribute is used for a foreign word to indicating the language used. The full form of acronym is given as value to title attribute and is shown as tool tip when mouse moves over text on web page. Acronym text placed between the opening <abbr> and closing </abbr> tags, is usually underlined with a dotted line in Firefox as shown
| HTML code <p> This is a <acronym title=”Joint_Venture”> JV</acronym> company.</p> | Browser output  |
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