introduction to a mark up langyage

Mark up Language
they ate languages that designed for definition,processing and presentation of text,the layout and style for formatting are usually specified using codes
tags
they are markup instructions
Types of Mark up languages

• Presentation markup they are binary codes  joined with document text to produce a what you see is what you get effects e g a word processing document
• Procedural mark up  they provide instructions to programs that are to process a specific text e g Post script
  
• Descriptive/logical/conceptual  mark up   they are usually used to label documents e g <cite/>tag in HTNL

^{Brief History of Mark up Languages}

• GenCode  is also known as generic coding and it wast discovered by William Tunniclife in the year 1967
• TeX it was created  by Donald Knuth in the year 1970s and 1980s 
• Scribe it was created by Brian Reid in the year 1980
• GML  stands for Generalized Mark up Language it was created in the 1980s under influence from Scribe
• SGML stands for Scribe Generalized Markup Language developed in the 1980s
• HTML  stands for Hyper Text Mark Up Language developed in the year 1989 by Sir Tim
• XML  stands for Extended Mark Up Language developed by World wide consortium
• XHTML  stands for Extended Hyper text mark up Language  recommended by W2C

 Features of a Mark Up Language

• same  data file is composed of  intermixing  of text of a document with mark up instruction 
• they specify a specific text characteristics
•  they have tags with text enclosed between the tags