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HTML5 Tutorial For Beginners - 5 of 6 - New Semantic Elements
HTML5 Tutorial For Beginners - 5 of 6 - New Semantic Elements
Published: 2014/03/06
Channel: tutor4u
Semantic Elements and Structure // HTML5 Basics
Semantic Elements and Structure // HTML5 Basics
Published: 2017/02/10
Channel: Brian Haferkamp
Semantic HTML: How to Structure Web Pages: Introduction
Semantic HTML: How to Structure Web Pages: Introduction
Published: 2015/06/03
Channel: Envato Tuts+
Semantic HTML: How to Structure Web Pages: Divs, Headings and the Document Outline
Semantic HTML: How to Structure Web Pages: Divs, Headings and the Document Outline
Published: 2015/06/03
Channel: Envato Tuts+
HTML5 Semantic Structure, Part 1
HTML5 Semantic Structure, Part 1
Published: 2016/01/22
Channel: Microsoft Video Courses
HTML5 Semantics
HTML5 Semantics
Published: 2013/10/02
Channel: DudeRocking
CSS-Tricks Screencast #100: Let
CSS-Tricks Screencast #100: Let's Write Semantic Markup
Published: 2012/07/16
Channel: Chris Coyier
Intro to HTML 3 - Semantic Markup (1)
Intro to HTML 3 - Semantic Markup (1)
Published: 2016/04/06
Channel: Dev Material
HTML semantics: sections & articles
HTML semantics: sections & articles
Published: 2015/01/17
Channel: Thomas Bradley
Say What You Mean with Semantic HTML Markup - Daisy
Say What You Mean with Semantic HTML Markup - Daisy's Web Dev Diary
Published: 2014/06/04
Channel: The Hello World Program
Semantic HTML
Semantic HTML
Published: 2017/04/06
Channel: Greater Commons
semantic html
semantic html
Published: 2016/11/10
Channel: Learn To Code
Build An HTML5 Website With A Responsive Layout
Build An HTML5 Website With A Responsive Layout
Published: 2016/12/25
Channel: Traversy Media
HTML Tips and Tricks: Semantic HTML
HTML Tips and Tricks: Semantic HTML
Published: 2013/11/25
Channel: Envato Tuts+
Semantic Markup with HTML5
Semantic Markup with HTML5
Published: 2013/11/18
Channel: Montague Monro
Responsive landing page with semantic ui- basic html web page
Responsive landing page with semantic ui- basic html web page
Published: 2016/01/21
Channel: Code-Fi
HTML5 Semantic Markup Tags & Layout - HTML Tutorial for Beginners
HTML5 Semantic Markup Tags & Layout - HTML Tutorial for Beginners
Published: 2017/08/13
Channel: PixemWeb
Learning HTML 5 : #8 Semantic HTML
Learning HTML 5 : #8 Semantic HTML
Published: 2016/03/12
Channel: whatjackhasmade
beginners coding in html -Semantics Organization-Non semantic Elements ("div" and "span")
beginners coding in html -Semantics Organization-Non semantic Elements ("div" and "span")
Published: 2015/10/26
Channel: free cours
Why to use meaningful HTML tags, also known as semantic HTML
Why to use meaningful HTML tags, also known as semantic HTML
Published: 2016/08/15
Channel: BuildAModule
Intro to HTML and CSS - Using Semantic Tags
Intro to HTML and CSS - Using Semantic Tags
Published: 2015/02/23
Channel: Udacity
Semantic HTML5 Elements and markup -- HTML5 in Hindi
Semantic HTML5 Elements and markup -- HTML5 in Hindi
Published: 2014/06/27
Channel: vishAcademy
HTML: Semantic Tables
HTML: Semantic Tables
Published: 2010/09/30
Channel: Educator.com
HTML5 and CSS3 beginner tutorial 29 - Semantic tags for the layout
HTML5 and CSS3 beginner tutorial 29 - Semantic tags for the layout
Published: 2017/02/27
Channel: Quentin Watt Tutorials
Beginning HTML & CSS Part 5: Semantic HTML
Beginning HTML & CSS Part 5: Semantic HTML
Published: 2017/09/19
Channel: CodeTime
Lesson 2 - Semantic HTML
Lesson 2 - Semantic HTML
Published: 2012/10/28
Channel: gamegenome
Semantic HTML - 2016 (Kolev)
Semantic HTML - 2016 (Kolev)
Published: 2016/04/23
Channel: Telerik Academy
web design for beginners coding in html - Semantics Organization -Semantic Structural Elements
web design for beginners coding in html - Semantics Organization -Semantic Structural Elements
Published: 2015/10/26
Channel: free cours
Html5 Semantic Structure Elements
Html5 Semantic Structure Elements
Published: 2015/05/09
Channel: Simple Html Css
Fundamental IT & Web skills | S0E06 | Semantic HTML tags
Fundamental IT & Web skills | S0E06 | Semantic HTML tags
Published: 2017/09/16
Channel: Kristian Wittrup
Intro to HTML and CSS - Using Semantic Tags
Intro to HTML and CSS - Using Semantic Tags
Published: 2014/10/03
Channel: Udacity
Intro to HTML and CSS - Semantic Structure
Intro to HTML and CSS - Semantic Structure
Published: 2014/10/11
Channel: Udacity
Semantic UI - Input and Form - Part 5
Semantic UI - Input and Form - Part 5
Published: 2016/08/20
Channel: standupprogrammer
html tutorial for beginners - semantic markup
html tutorial for beginners - semantic markup
Published: 2017/06/24
Channel: Fredrik Christenson
42 applied semantic html
42 applied semantic html
Published: 2016/01/26
Channel: Learn To Code
HTML & CSS - semantic structure
HTML & CSS - semantic structure
Published: 2013/12/26
Channel: Meri Engel
HTML Semantic Elements
HTML Semantic Elements
Published: 2017/01/22
Channel: Savannah Fish
The Treehouse Show | Episode 138: Semantic UI, Polyfills, HTML 5 Patterns
The Treehouse Show | Episode 138: Semantic UI, Polyfills, HTML 5 Patterns
Published: 2015/04/28
Channel: Treehouse
(8/25) Semantic HTML and Stylish CSS
(8/25) Semantic HTML and Stylish CSS
Published: 2011/12/15
Channel: Code Cascade
Developments in semantic HTML - adding information to search listings
Developments in semantic HTML - adding information to search listings
Published: 2013/06/02
Channel: J and Beyond e.V.
Keeping Your HTML Semantic with SASS with Ray Villalobos
Keeping Your HTML Semantic with SASS with Ray Villalobos
Published: 2014/10/08
Channel: fitcevents
Using HTML Schemas for Semantic Markup Microdata
Using HTML Schemas for Semantic Markup Microdata
Published: 2014/03/05
Channel: Kevin W. Tharp
Curs 1 - Lectia 07 - HTML semantic
Curs 1 - Lectia 07 - HTML semantic
Published: 2015/02/28
Channel: invata.org
Semantic Review - HTML: Project Structure
Semantic Review - HTML: Project Structure
Published: 2017/09/05
Channel: Malcolm Ross
Benefits of Using the Html5 Semantic Elements in Telugu
Benefits of Using the Html5 Semantic Elements in Telugu
Published: 2016/01/10
Channel: VLR Training
Accessible address finder tutorial: Screen reader after adding semantic HTML
Accessible address finder tutorial: Screen reader after adding semantic HTML
Published: 2017/09/12
Channel: Zoë Bryant
Semantic UI: Part 1 - Setting up Project
Semantic UI: Part 1 - Setting up Project
Published: 2016/08/14
Channel: standupprogrammer
HTML5 Tutorials in Urdu/Hindi for beginners Part 15 Semantic Elements
HTML5 Tutorials in Urdu/Hindi for beginners Part 15 Semantic Elements
Published: 2016/03/22
Channel: Aqib Ali
41 intro semantic html
41 intro semantic html
Published: 2016/01/26
Channel: Learn To Code
plain-old-semantic-html.mp4
plain-old-semantic-html.mp4
Published: 2011/04/08
Channel: David Doolin
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Semantic HTML is the use of HTML markup to reinforce the semantics, or meaning, of the information in webpages and web applications rather than merely to define its presentation or look. Semantic HTML is processed by traditional web browsers as well as by many other user agents. CSS is used to suggest its presentation to human users.

As an example, recent HTML standards discourage use of the element i (italic, a typeface)[1] in preference of more accurate elements such as em (emphasis); the CSS stylesheet should then specify whether emphasis is denoted by an italic font, a bold font, underlining, slower or louder audible speech etc. This is because italics are used for purposes other than emphasis, such as citing a source; for this, HTML 4 provides the element cite.[2] Another use for italics is foreign phrases or loanwords; web designers may use built-in XHTML language attributes[3] or specify their own semantic markup by choosing appropriate names for the class attribute values of HTML elements (e.g. class="loanword"). Marking emphasis, citations and loanwords in different ways makes it easier for web agents such as search engines and other software to ascertain the significance of the text.

History[edit]

HTML has included semantic markup since its inception.[4] In an HTML document, the author may, among other things, "start with a title; add headings and paragraphs; add emphasis to [the] text; add images; add links to other pages; [and] use various kinds of lists".[5]

Various versions of the HTML standard have included presentational markup such as <font> (added in HTML 3.2; removed in HTML 4.0 Strict), <i> (all versions) and <center> (added in HTML 3.2). There are also the semantically neutral span and div elements. Since the late 1990s when Cascading Style Sheets were beginning to work in most browsers, web authors have been encouraged to avoid the use of presentational HTML markup with a view to the separation of presentation and content.[6]

In 2001, Tim Berners-Lee participated in a discussion of the Semantic Web, where it was presented that intelligent software 'agents' might one day automatically trawl the Web and find, filter and correlate previously unrelated, published facts for the benefit of end users.[7] Such agents are not commonplace even now, but some of the ideas of Web 2.0, mashups and price comparison websites may be coming close. The main difference between these web application hybrids and Berners-Lee's semantic agents lies in the fact that the current aggregation and hybridisation of information is usually designed in by web developers, who already know the web locations and the API semantics of the specific data they wish to mash, compare and combine.

An important type of web agent that does crawl and read web pages automatically, without prior knowledge of what it might find, is the Web crawler or search-engine spider. These software agents are dependent on the semantic clarity of web pages they find as they use various techniques and algorithms to read and index millions of web pages a day and provide web users with search facilities.

In order for search-engine spiders to be able to rate the significance of pieces of text they find in HTML documents, and also for those creating mashups and other hybrids, as well as for more automated agents as they are developed, the semantic structures that exist in HTML need to be widely and uniformly applied to bring out the meaning of published information.[8]

While the true semantic web may depend on complex RDF ontologies and metadata, every HTML document makes its contribution to the meaningfulness of the Web by the correct use of headings, lists, titles and other semantic markup wherever possible. This "plain" use of HTML has been called "Plain Old Semantic HTML" or POSH.[9] The correct use of Web 2.0 'tagging' creates folksonomies that may be equally or even more meaningful to many.[8] HTML 5 introduced new semantic elements such as section, article, footer, progress, nav, aside, mark, and time.[10][11] Overall, the goal of the W3C is to slowly introduce more ways for browsers, developers, and crawlers to better distinguish between different types of data, allowing for benefits such as better display on browsers on different devices.[10]

Presentational elements are not deprecated in current HTML (4.01) and XHTML recommendations, but were recommended against. In HTML 5 some of those elements, such as i[12] and b[13] are still specified as their meaning has been clearly defined "as to be stylistically offset from the normal prose without conveying any extra importance".

Considerations[edit]

In cases where a document requires more precise semantics than those expressed in HTML alone, fragments of the document may be enclosed within span or div elements with meaningful class names[14] such as <span class="author"> and <div class="invoice">. Where these class names are also a fragment identifier within a schema or ontology, they may link to a more defined meaning. Microformats formalise this approach to semantics in HTML.

One important restriction of this approach is that such markup based on element inclusion must meet the well-formedness conditions. As these documents are broadly tree-structured, this means that only balanced fragments from a sub-tree can be marked up in this way.[15] A means of marking-up any arbitrary section of HTML would require a mechanism independent of the markup structure itself, such as XPointer.

Good semantic HTML also improves the accessibility of web documents (see also Web Content Accessibility Guidelines).[citation needed] For example, when a screen reader or audio browser can correctly ascertain the structure of a document, it will not waste the visually impaired user's time by reading out repeated or irrelevant information when it has been marked up correctly.

Google "rich snippets"[edit]

In 2010, Google specified three forms of structured metadata that their systems will use to find structured semantic content within webpages. Such information, when related to reviews, people profiles, business listings, and events will be used by Google to enhance the "snippet", or short piece of quoted text that is shown when the page appears in search listings. Google specifies that that data may be given using microdata, microformats or RDFa.[16] Microdata is specified inside itemtype and itemprop attributes added to existing HTML elements; microformat keywords are added inside class attributes as discussed above; and RDFa relies on rel, typeof and property attributes added to existing elements.[17]

See also[edit]

References[edit]

  1. ^ "Alignment, font styles, and horizontal rules in HTML documents". W3C. 2002 [2000]. 
  2. ^ "HTML 4.01 Specification: Phrase elements: EM, STRONG, DFN, CODE, SAMP, KBD, VAR, CITE, ABBR, and ACRONYM". W3C. 1999. Retrieved 2009-10-18. 
  3. ^ "XHTML 1.0 The Extensible HyperText Markup Language (Second Edition): The lang and xml:lang Attributes". W3C. 2002 [2000]. Retrieved 2009-10-18. 
  4. ^ Berners-Lee, Tim; Fischetti, Mark (2000). Weaving the Web: The Original Design and Ultimate Destiny of the World Wide Web by Its Inventor. San Francisco: Harper. ISBN 978-0062515872. 
  5. ^ Raggett, Dave (24 April 2005). "Getting started with HTML". World Wide Web Consortium. Retrieved 8 December 2010. 
  6. ^ Raggett, Dave (8 April 2002). "Adding a touch of style". World Wide Web Consortium. Retrieved 8 December 2010.  This article notes that presentational HTML markup may be useful when targeting browsers "before Netscape 4.0 and Internet Explorer 4.0" which were both released in 1997.
  7. ^ Berners-Lee, Tim; Hendler, James; Lassila, Ora (2001). "The Semantic Web". Scientific American. Retrieved 2009-10-02. 
  8. ^ a b Shadbolt, Nigel; Berners-Lee, Tim; Hall, Wendy (May–June 2006). "The Semantic Web Revisited" (PDF). IEEE Intelligent Systems. Retrieved 8 December 2010. 
  9. ^ "Plain Old Semantic HTML (POSH)". Microformats Wiki. microformats community. April 20, 2007. Retrieved May 4, 2013. 
  10. ^ a b "Understanding Semantic HTML and Its Applications for 2015 and Beyond". Dallas SEO Geek. Retrieved 26 October 2015. 
  11. ^ Robinson, Mike. "Let's Talk about Semantics". HTML 5 Doctor. Retrieved 26 October 2015. 
  12. ^ "HTML5". World Wide Web Consortium. Section 4.5.17: The i element. 
  13. ^ "HTML5". World Wide Web Consortium. Section 4.5.18: The b element. 
  14. ^ These class names are at best suggestive rather than formally meaningful, unless they are previously shared between both creator and consumer of the content.
  15. ^ "Well-Formed XML Documents". Extensible Markup Language (XML) 1.1. W3C. 
  16. ^ "Rich snippets". Webmaster Central. Google. Retrieved 26 May 2010. 
  17. ^ "Businesses and organizations - About organization information". Webmaster Central. Google. Retrieved 26 May 2010. 

External links[edit]

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