15.2.30. XML Schema appinfo element

发布时间 :2025-10-25 12:23:21 UTC      

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Definition and usage

The appInfo element specifies the information to be used by the application in the annotation element. The element must be in the annotation.

Element information

  • 父元素: Annotation

Grammar

<appinfo
source=anyURL
>
Any well-formed XML content
</appinfo>

Attribute

Description

Source

Optional. A URI reference that specifies the source of the application information.

Example 1

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:annotation>
  <xs:appinfo>RUNOOB Note</xs:appinfo>
  <xs:documentation xml:lang="en">
  This Schema defines a RUNOOB note!
  </xs:documentation>
</xs:annotation>
.
.
.
</xs:schema>

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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.