Elements and attributes
removed or obsoleted 
<frame>, <frameset>
<a name>
more...
Pdf hyperlinks - insert, remove PDF links in C#.net, ASP.NET, MVC, Ajax, WinForms, WPF
Free C# example code is offered for users to edit PDF document hyperlink (url), like inserting and deleting
add hyperlink to pdf online; change link in pdf
Pdf hyperlinks - VB.NET PDF url edit library: insert, remove PDF links in vb.net, ASP.NET, MVC, Ajax, WinForms, WPF
Help to Insert a Hyperlink to Specified PDF Document Page
add link to pdf acrobat; adding links to pdf in preview
New APIs for scripting
API for <video> & <audio> 
2D drawing API for <canvas>
getElementsByClassName()
innerHTML
more...
C# PDF Convert to HTML SDK: Convert PDF to html files in C#.net
Embed zoom setting (fit page, fit width). Turn PDF form data to HTML form. Export PDF images to HTML images. Embed PDF hyperlinks to HTML links.
add hyperlinks to pdf; pdf links
VB.NET PDF Convert to HTML SDK: Convert PDF to html files in vb.
Turn PDF images to HTML images in VB.NET. Embed PDF hyperlinks to HTML links in VB.NET. Available zoom setting (fit page, fit width).
adding hyperlinks to pdf documents; add links to pdf document
HTML design principles
http://w3.org/TR/html-design-principles/
VB.NET PDF Page Replace Library: replace PDF pages in C#.net, ASP.
DotNetNuke), SharePoint. Able to replace all PDF page contents in VB.NET, including text, image, hyperlinks, etc. Professional VB.NET
add hyperlink pdf document; add links to pdf acrobat
.NET PDF SDK | Read & Processing PDF files
of text, hyperlinks, bookmarks and metadata; Advanced document cleanup and image processing options provided; Annotate and redact in PDF documents; Fully support
adding a link to a pdf in preview; add link to pdf file
HTML design principles
Support existing content
Ensure interoperability
Precisely define UA behavior
Handle errors 
(
non-draconian
)
Evolution not revolution
VB.NET PDF Thumbnail Create SDK: Draw thumbnail images for PDF in
application. Generating thumbnail for PDF document is an easy work and gives quick access to PDF page and file, or even hyperlinks. This
convert excel to pdf with hyperlinks; pdf link to email
PDF Image Viewer| What is PDF
advanced capabilities, such as text extraction, hyperlinks, bookmarks and metadata as well as updating, splitting and merging pages from existing PDF documents
convert doc to pdf with hyperlinks; add links to pdf in preview
Important point:
HTML5 includes XHTML
Frequently Asked 
Questions (FAQ) about 
the future of XHTML
http://w3.org/2009/06/xhtml-faq.html
About error handling...
• Well-formed XML:
<input disabled="disabled"/>
• Empty attribute: 
<input disabled>
• Without quotes: 
<input value=yes>
• Single quotes: 
<input type='checkbox'/>
• Double quotes: 
<input name="be evil"/>
Which of these are errors?
<i><b>misnested tags</i></b>
This is a real error
HTML5 defines how 
browsers can handle real 
errors interoperably and 
gracefully.
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