0.<!doctype Html> declares that the document is HTML and must be on the first line.
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3.<meta charset= "Utf-8" > Set document character encoding to UTF-8.
4.<title></title> contains text as a caption.
5.<body></body> is the content of the Web page.
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7.<section></section> is defined as a chunk in the document and supports automatic adjustment of the heading level within the label.
8.<article></article> is defined as independent content, similar to <section></section>.
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11.<nav></nav> is defined as the navigation bar link section.
12.<ol></ol> is defined as an ordered list.
13.<ul></ul> is defined as an unordered list.
14.<li></li> is defined as a list item.
15.<a href= "http://www.cnblogs.com" ></a> defined as a link. can also point to elements within the page, such as the presence of <article id= "name" ></article>, then <a href= "#name" ></a> can point to that independent content.
16.<p></p> is defined as a paragraph.
17.<aside></aside> is defined as the sidebar, which controls the appearance of the display via CSS.
18.<footer></footer> is defined as a footer.
19.<div></div> is defined as a generic container, and more styles can be added through a common container.
20.role= "Name" adds a landmark role to the element, name refers to the ARIA specification.
21.id= "Name" adds a unique identifier for the element, name is the identifier.
22.class= "Name" specifies the category for the element, and name is the category name. You can specify more than one category.
23.title= "Name" adds a caption to the element, and name is the title. The title can be displayed when the mouse hovers over it.
24.<!--content--> To add comments to the code.
HTML Learning Notes: Basic structure