SENG 422 Lab 5 An Introduction to XML Time: ELW B220 from (4:00 - 6:50) every Tuesday TA: Philip Baback Alipour Ph.D. Candidate in Electrical, Computer Engineering and Quantum Physics, Dept. of Electrical and Computer Engineering, University of Victoria, CA
SENG 422 Lab 5 An Introduction to XML - XML, or Extensible Markup Language is a markup language using which you can create your own tags. - XML was created to overcome the shortcomings of HTML WHY XML?
-HTML was designed for humans not machines (high level representation of data). -In HTML browser just follows the instructions and does not understand the content (information traversing across www). WHY XML?
- XML Separates Data from HTML - XML Simplifies Data; SharingXML Simplifies Data Sharing - XML Simplifies Platform Changes A Comparison XML Separates Data
from HTML An Example - A tag is the text between the brackets (<) and (>). Such as and ) - An element is the starting tag, the ending tag,
and everything in between. - An attribute is a name-value pair inside the starting tag of an element. In this example, state is an attribute of the element. Some Rules
- The root element: Everything should be inside one element - No overlapping between elements - End tags are required - Elements are case sensitive
Data Definition Two Methods: - Document Type Definition - XML Schema XML Schema
- XML schemas use XML syntax - XML schemas support data types - XML schemas are extensible - XML schemas have more expressive power Schema Example r
Schema Example r Assignment Create a schema for a checklist. It may contain the following: - Surveyor ID
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