Heads, tables, paragraphs and lists are examples of the elements that are fundamental components to the structure of a HTML document. To identify these various elements in an HTML document, you use tags.
HTML tags consist of a tag name, a left angle < bracket and a right angle > bracket. Tags are usually paired (e.g.<TITLE>PSP</TITLE>) to start and end the tag instruction. The end tag looks just like the start tag except a slash proceeds the text within the brackets (as in the example above).
Some elements may include an attribute, which is additional information that is included inside the start tag. For example you can specify the alignment of an image (top, middle, bottom) by including the attribute with the image source HTML code.
So, an element is a fundamental component of the HTML document, tags start and end an element and an attribute is additional information placed in the beginning tag.
HTML is not case sensitive, you can use upper or lower case.
Not all tags are supported by all World Wide Web browsers. If a tag is not supported the browser will simply ignore it, however any text placed in between the unknown tags will still be displayed.
The Minimal HTML Document
Browsers expect specific information because they are programmed according to HTML and SGML specifications. This is the absolute minimal information required by all browsers:
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