XML was developed as a simpler alternative. SGML is complex, which has limited its widespread understanding and adoption. HTML5 creates a similar result by defining what tags can be omitted. (If one paragraph element cannot contain another, any currently open paragraph must be closed before starting another.) Because this implication is based on the combination of the DTD and the individual document, it is not usually possible to infer elements from document tags alone but only by using an SGML-or HTML-aware parser with knowledge of the DTD. But since the DTD states that paragraph elements cannot be nested, an HTML document fragment Para 1 Para 2 Para 3 is thus inferred to be equivalent to Para 1 Para 2 Para 3. As a simple example, the tag indicating the start of a paragraph element should be complemented by a tag indicating its end. It is part of general SGML behavior that, where only one valid structure is possible (per the DTD), its explicit statement in any given document is not generally required. it defines the set of element types) and also the valid combinations in which they may appear in a document. The DTD specifies which element types are possible (i.e. Optional tagsĪs HTML (before HTML5) is based on SGML, its parsing also depends on the Document Type Definition (DTD), specifically an HTML DTD (e.g. The contents of the element must be placed between just after the start tag (which might be implied, in certain cases) and just before the end tag (which again, might be implied, in certain cases). (.) The start and end tags of certain normal elements can be omitted, (.) Tags are used to delimit the start and end of elements in the markup. Similarly the W3C Recommendation HTML 5.1 2nd Edition explicitly says: For instance, the HEAD element is always present, even though both start and end HEAD tags may be missing in the markup. Remember that the element is one thing, and the tag (be it start or end tag) is another. Some people refer to elements as tags (e.g., "the P tag"). The distinction is explicitly emphasised in HTML 4.01 Specification:Įlements are not tags. This is the case for many, but not all, elements within an HTML document. tags Īs is generally understood, the position of an element is indicated as spanning from a start tag and is terminated by an end tag. This is the end of this section, you can continue to the next section or try the exam to test your knowledge.HTML element content categories Elements vs. This tag allows you to insert line breaks
HTML TAGS LIST WITH EXAMPLES PROFESSIONAL
They are not required but when used are very effective in creating professional effective websites.
These are the other tags that HTML commonly uses in documents.
This contains the contents of the document This is the text that goes in the title bar or the browser window. This includes information including title, meta tags, content type, links to external pages like CSS and JavaScript. These are the tags you put at the beginning and end of an HTML file. Table below shows you the opening and closing tag, a description and an example. There is a range of HTML tags, they help you to design your web page. HTML is a fairly straightforward programming language.
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