HTTP, HTML/XML and URL

HTTP

 
    GET /index.html HTTP/1.1
    Accept-Charset: iso-8859-5, unicode-1-1
    ...

HTML/XML

 
    <title> Web History <\title>
    <p> A paragraph of text <\p>

URL

    http://www.w3.org/People/danield
    news:comp.windows.x
    mailto:danield@w3.org