XML -Declaration, Tags & Elements, Syntax, Document, Parser & Validation | Computer Science

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TOPICS TO BE DISCUSSED
INTRODUCTION
XML VS. HTML
DIFFERENCES
SIMILARITIES
WORKING MODEL OF XML
Syntax
XML Declaration
XML Tags & Elements
Text
References
XML Document
XML Parser
XML Validation


Introduction
XML stands for Extensible Markup Language. It is called extensible because you can manipulate it according to your need by creating your own self - descriptive tags.
It is derived from SGML i.e. Standard Generalized Markup Language.
It is developed by W3C i.e. World Wide Consortium.
It is used to store and transfer/exchange data between different applications or systems.
XML documents can be easily parsed.
XML is a case sensitive language. The name of the start and end tag must be in same case.
XML VS. HTML- Differences
xml
It is extensible as it can be customized according to our need using user-defined tags.
As It is used to store and exchange data between applications and give focus on content.
It is case sensitive.
It is very strict about the structure of XML document. Means every tag that is started will be closed in appropriate manner.
XML provide a framework to define markup languages.


html
HTML is a pre-defined Language. You can use just pre-defined tags.
It is used to design web pages. It only gives focus on presentation of data.
It is not case sensitive
HTML is very lenient for the structure of HTML document.
HTML is a markup language itself.
Xml vs html -Similarities
Both are derived from SGML.
They are structure based language.
They are markup languages as tags are used in both the languages.
In both languages, we create code in notepad and view in web browser.


Working Model Of XML
Syntax Rule- XML Declaration
XML declaration is always declared at the beginning of the html document.
XML Declaration Code:
Attributes:
version: specify the xml version
encoding: specify the character encoding
Note: XML declaration is optional.

Chapters:
0:00 XML
0:10 Topics
1:06 Introduction
3:03 Difference Between XML VS. HTML
5:28 Similarities Between XML VS. HTML
6:17 Working Model of XML
6:47 Syntax Rule – XML Declaration
7:45 Syntax Rule – Tags/Elements
8:18 Rules for Creating Tags
9:02 Syntax Rules – XML Text
10:04 Example of Syntax Rules – XML Text
10:10 Syntax Rule – References
11:14 XML Document
11:36 XML Parser
12:21 XML Validation
12:36 Validation Checks
13:05 Questions
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