4.7. W3C CSS event

4.7.1. CSS tutorial ¶

To learn more about CSS, please read our CSS tutorial.

CSS1 ¶

As a W3C recommendation, CSS1 was released on December 17, 1996. On January 11, 1999, this recommendation was revised.

CSS2 ¶

As a W3C recommendation, CSS2 was released on January 11, 1999. CSS2 adds support for media (printers and hearing devices) and downloadable fonts.

CSS3 ¶

CSS3 plans to divide CSS into smaller modules.

CSS4 ¶

Starting with CSS3, modules will be defined separately, for example, css4 selectors can be defined in CSS3 modules.

4.7.3. W3C CSS specification and timeline ¶

Standard	Draft / proposal	Recommended date
CSS 1		Dec 1996
CSS 1 (Revised)		Apr 2008
CSS 2		May 1998
CSS 2.1		Jun 2011
DOM Level 2 Style Specification		Nov 2000
CSS Style Attributes	Oct 2010
CSS 3 Namespaces Module		Sep 2011
CSS 3 Selectors		Sep 2011
CSS 3 User Interface Module	Jan 2012
CSS 3 Fonts Module	Feb 2013
CSS 3 Color Module		Jun 2011
CSS 3 Backgrounds and Borders Module	Jul 2012
CSS 3 Text Module	Nov 2012
CSS 3 Lists and Counters Module	May 2011
CSS 3 Line Module	May 2002
CSS 3 Basic Box model	Aug 2007
CSS 3 Multi-column Layout Module	Apr 2011
CSS 3 Ruby Module	Jun 2011
CSS 3 Speech Module	Mar 2012
CSS 3 Paged Media Module	Oct 2006
CSS 3 Generated content for Paged Media Module	Nov 2011
CSS 3 Values and Units Module	Aug 2012
CSS 3 Cascading and Inheritance	Jan 2013
CSS 3 Template Layout Module	Nov 2011
CSS 3 Media Queries		Jun 2012

CSS Mobile Profile 2.0	Dec 2008
CSS TV Profile 1.0	May 2003
CSS Print Profile 1.0	Oct 2006

Standard

Draft / proposal

Recommended date

CSS 1

Dec 1996

CSS 1 (Revised)

Apr 2008

CSS 2

May 1998

CSS 2.1

Jun 2011

DOM Level 2 Style Specification

Nov 2000

CSS Style Attributes

Oct 2010

CSS 3 Namespaces Module

Sep 2011

CSS 3 Selectors

Sep 2011

CSS 3 User Interface Module

Jan 2012

CSS 3 Fonts Module

Feb 2013

CSS 3 Color Module

Jun 2011

CSS 3 Backgrounds and Borders Module

Jul 2012

CSS 3 Text Module

Nov 2012

CSS 3 Lists and Counters Module

May 2011

CSS 3 Line Module

May 2002

CSS 3 Basic Box model

Aug 2007

CSS 3 Multi-column Layout Module

Apr 2011

CSS 3 Ruby Module

Jun 2011

CSS 3 Speech Module

Mar 2012

CSS 3 Paged Media Module

Oct 2006

CSS 3 Generated content for Paged Media Module

Nov 2011

CSS 3 Values and Units Module

Aug 2012

CSS 3 Cascading and Inheritance

Jan 2013

CSS 3 Template Layout Module

Nov 2011

CSS 3 Media Queries

Jun 2012

CSS Mobile Profile 2.0

Dec 2008

CSS TV Profile 1.0

May 2003

CSS Print Profile 1.0

Oct 2006

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.