4.9. W3C XML Schema event

Release time : 2023-12-21 23:00:03 UTC      

XML Schema is a DTD substitute based on XML.

4.9.1. XML Schema tutorial

To learn more about XML Schema, please read our XML Schema tutorial.

4.9.2. XML Schema

XML 1. 0 supports DTD that defines the structure of the document.

XML Schema has better support for applications, document structures, properties, and data types.

Future versions of XML rely on XML Schema to define the type of XML document.

  • The structure (XML Schema Structure) of XML Schema specifies the definition language of XML Schema.

  • The data type of XML Schema defines an extensible data type for XML.

4.9.3. W3C XML specification and timeline

Standard

Draft / proposal

Recommended time

XML Schema (XSD)

  1. May 2001

XML Schema 1.0: Structures

  1. May 2001

XML Schema 1.0: Datatypes

  1. May 2001

XML Schema (2.Ed)

  1. Oct 2004

XML Schema Structures (2.Ed)

  1. Oct 2004

XML Schema Datatypes (2.Ed)

  1. Oct 2004

XML Schema Component Designators

  1. Jan 2010

XML Schema 1.1: Structures

  1. Jul 2011

XML Schema 1.1: Datatypes

  1. Jul 2011

Principles, Technologies, and Methods of Geographic Information Systems  102

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.