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HTML5 tag names are case insensitive and may be written in all uppercase or mixed case,
although the most common convention is to stick with lowercase.
Most of the elements contain some content like
...
contains a paragraph. Some
elements, however, are forbidden from containing any content at all and these are known as
void elements. For example, br, hr, link and meta etc.
HTML5 Attributes:
Elements may contain attributes that are used to set various properties of an element.
Some attributes are defined globally and can be used on any element, while others are defined
for specific elements only. All attributes have a name and a value and look like as shown below
in the example.
Following is the example of an HTML5 attributes which illustrates how to mark up a div element
with an attribute named class using a value of "example":
...
Attributes may only be specified within start tags and must never be used in end tags.
HTML5 attributes are case insensitive and may be written in all uppercase or mixed case,
although the most common convention is to stick with lowercase.
HTML5 Document:
The following tags have been introduced for better structure:
section: This tag represents a generic document or application section. It can be used
together with h1-h6 to indicate the document structure.
article: This tag represents an independent piece of content of a document, such as a
blog entry or newspaper article.
aside: This tag represents a piece of content that is only slightly related to the rest of
the page.
header: This tag represents the header of a section.
footer: This tag represents a footer for a section and can contain information about the
author, copyright information, et cetera.
nav: This tag represents a section of the document intended for navigation.
dialog: This tag can be used to mark up a conversation.
figure: This tag can be used to associate a caption together with some embedded
content, such as a graphic or video.
The markup for an HTM 5 document would look like the following:
......
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