What are the w3c standards?

w3c standards include "HTML (Hypertext Markup Language) and its extensions", "CSS (Cascading Style Sheets) and its extensions", "XML (Extensible Markup Language) and related technologies", "Web There are five types of service-related standards and "Web security-related standards": 1. HTML is a standard language used to create Web pages, and W3C has formulated multiple versions of HTML standards; 2. CSS is a standard language used to describe the style of Web pages. ; 3. XML is a standard language used to describe data, etc.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

W3C (World Wide Web Consortium) is an international organization dedicated to promoting the development and standardization of Web technology. The following are some important classifications and representative standards of W3C standards:

1. HTML (Hypertext Markup Language) and its extensions: HTML is a standard language for creating Web pages, formulated by W3C Multiple versions of HTML standards, including HTML 4, XHTML, HTML5, etc. In addition, there are some extension standards for HTML, such as MathML (Mathematical Markup Language) and SVG (Scalable Vector Graphics).

2. CSS (Cascading Style Sheets) and its extensions: CSS is a standard language used to describe Web page styles. W3C has developed multiple versions of CSS standards, including CSS 1 and CSS 2. , CSS 3, etc. In addition, there are some CSS extension standards, such as CSS Grid (grid layout) and CSS Flexbox (flexible box layout).

3. XML (Extensible Markup Language) and related technologies: XML is a standard language for describing data. W3C has also developed multiple XML-related standards, including XSLT (Extensible Stylesheet Language Conversion), XPath (XML Path Language), etc.

4. Web service related standards: W3C has developed some standards for Web services, such as SOAP (Simple Object Access Protocol) and WSDL (Web Services Description Language).

5. Web security related standards: W3C has developed some standards on Web security, such as SSL/TLS (Secure Sockets Layer/Transport Layer Security), CSP (Content Security Policy), etc. .

In addition, W3C has also developed many other standards and specifications, such as RDF (Resource Description Framework), OWL (Web Ontology Language), etc. The formulation of these standards and specifications has played a vital role in the development and promotion of Web technology, and has also provided some powerful tools and guidelines for Web developers.

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