See http://dev.xwiki.org/xwiki/bin/view/Drafts/SyntaxMigrationGuide and http://platform.xwiki.org/xwiki/bin/view/Main/XWikiSyntax

Things to convert

• Bold syntax
• Italic syntax
• Link syntax
• List syntax
  • 2.0 support a paragraph but 1.0 stop at first found new line
  • mixed syntaxes are not supported
• Section syntax
  • 2.0 support a paragraph but 1.0 stop at first found new line
  • section consume all following new lines
• Pre macro
  • spaces and new lines are not taken into account (the HTML way)
• Radeox macros
  • code
    • never inline
    • executed before anything else, even velocity
    • support mixed parameters types (with or without the key)
  • attach
    • always inline
    • support mixed parameters types (with or without the key)
  • chart (depends on XWIKI-2883)
  • image
    • always inline
    • support mixed parameters types (with or without the key)
  • jira (depends on XWIKI-3078)
  • quote
  • rss (depends on XWIKI-2882)
  • style (depends on XWIKI-2967)
  • table
    • never inline
  • field
  • display
  • form
  • graphviz
  • laszlo
  • svg
• Velocity macros
  • include
    • always inline
  • toc
    • never inline
  • info, warning, error (depends on XWIKI-2968)
    • always inline
• enclose velocity code velocity macro
• enclose html code html macro
• single new line are generally not taken into account in 1.0
• escape pure 2.0 syntax

Things not convertible

• 1.0 syntax generated by Velocity