14-11-2012, 02:40 PM
DIVE INTO HTML5
ebook_manual_en_dive-into-html5.pdf (Size: 5.18 MB / Downloads: 300)
A TIMELINE OF HTML DEVELOPMENT FROM 1997 TO 2004
In December 1997, the World Wide Web Consortium (W3C) published HTML 4.0 and
promptly shut down the HTML Working Group. Less than two months later, a separate W3C
Working Group published XML 1.0. A mere three months aer that, the people who ran the
W3C held a workshop called “Shaping the Future of HTML” to answer the question, “Has
diveintohtml5.org HOW DID WE GET HERE?
W3C given up on HTML?” is was their answer:
In discussions, it was agreed that further extending HTML 4.0 would be difficult, as
would converting 4.0 to be an XML application. e proposed way to break free of
these restrictions is to make a fresh start with the next generation of HTML based
upon a suite of XML tag-sets.
EVERYTHING YOU KNOW ABOUT XHTML IS WRONG
Why are MIME types important? Why do I keep coming bac to them? tree words: draconian
error handling. Browsers have always been “forgiving” with HTML. If you create an HTML
page but forget the </head> tag, browsers will display the page anyway. (Certain tags
implicitly trigger the end of the <head> and the start of the <body>.) You are supposed to
nest tags hierarically — closing them in last-in-first-out order — but if you create markup
like <b><i></b></i>, browsers will just deal with it (somehow) and move on without
displaying an error message.
As you might expect, the fact that “broken” HTML markup still
worked in web browsers led authors to create broken HTML
pages. A lot of broken pages. By some estimates, over 99% of
HTML pages on the web today have at least one error in them.
But because these errors don’t cause browsers to display visible
error messages, nobody ever fixes them.
WHAT WORKING GROUP?
e Web Hypertext Applications Tecnology Working Group
is a loose, unofficial, and open collaboration of Web
browser manufacturers and interested parties. e group
aims to develop specifications based on HTML and related
tecnologies to ease the deployment of interoperable Web
Applications, with the intention of submiing the results to
a standards organisation. is submission would then form
the basis of work on formally extending HTML in the
standards trac.
e creation of this forum follows from several months of
work by private e-mail on specifications for su
tenologies. e main focus up to this point has been
extending HTML4 Forms to support features requested by
authors, without breaking bawards compatibility with
existing content. is group was created to ensure that future
development of these specifications will be completely open,
through a publicly-arived, open mailing list.