Differences

1. Differences between HTML 3.2 and HTML 4.0
   1. Differences in elements
      1. New items
      2. Unwanted elements
      3. Obsolete items
   2. Differences in attributes
   3. Differences in availability
   4. Differences in metadata
   5. Differences in the text
   6. Differences in references
   7. Differences in tables
   8. Differences in images, objects and navigation maps
   9. Differences in forms
   10. Differences in stylesheets
   11. Differences in frames
   12. Differences in scripts
   13. Differences in internationalization
2. Performance, Implementation, and Design Notes
   1. Notes on invalid documents
   2. Special characters in URI attribute values
      1. Non-ASCII characters in URI attribute values
      2. Ampersands in URI attribute values
   3. SGML implementation notes
      1. Line breaks
      2. Specifying non-HTML data
         • Element content
         • Attribute values
      3. SGML features with limited support
      4. Boolean attributes
      5. Marked Sections
      6. Processing Instructions
      7. Shorthand markup
   4. Notes on the search engines engines index your Web site
      1. Search robots
         • The robots.txt file
         • Robots and the META element
   5. Notes on tables
      1. Design rationale
         • Dynamic reformatting
         • Incremental display
         • Structure and presentation
         • Row and column groups
         • Accessibility
      2. Recommended Layout Algorithms
         • Fixed Layout Algorithm
         • Autolayout Algorithm
   6. Notes on forms
      1. Incremental display
      2. Future projects
   7. Notes on scripting
      1. Reserved syntax for future script macros
         • Current Practice for Script Macros
   8. Notes on frames
   9. Notes on accessibility
   10. Notes on security
       1. Security issues for forms