New Tags in HTML 5

The new tags in HTML 5 are:

The article element contains the main theme(s) of an HTML document.
The aside element is used for an HTML sidebar.
<bdi> and <bdo>
The <bdi> tag (bi-directional isolation) isolates a span of text that might be formatted in a different direction from other text outside the bdi element. The <bdo> tag (bi-directional override) explicitly overrides the directionality property of the text within the bdo element.
The canvas element creates a two-dimensional drawing surface which can be used to draw images using 2-D drawing functions.
The <datalist> tag is used to create a combo box input field with autocomplete in an HTML form.
The <embed> tag can be used to embed content from an external resource into a web page.
The <figure> tag provides a container for content that is equivalent to a figure or diagram in a book.
The <footer> tag is one of the HTML tags for headings and footers in HTML and contains the footer of a section.
The <mark> tag can be used to temporarily highlight a fragment of text from another source that was not necessarily highlighted by the original author, such as the search terms that appear in search engine results.
The <meter> tag is used for a gauge or other indicator, to display a value on a measurement scale with a specific maximum value.
The <nav> tag is used to create a navigation section of a web page.
<ruby>, <rt> and <rp>
The <ruby> tag is used to mark up base text which is to be annotated with supplemental text.
The <section> tag is used for a generic section in an HTML document.
The source tag identifies one possible source of the embedded audio or video media indicated by its parent tag.
The <time> tag is used to display a time, Gregorian date, or date and time.
While the <u> tag was deprecated in 1997 HTML 4 and removed in the year 2000 W3C Recommendation, it has been added back in HTML 5.
The <wbr/> tag can be used to specify additional places where the browser can do a line break if necessary.