• More keyword groups were added (more syntax highlighting can be defined).
• Multipart keywords are supported.
• Whitespace is no longer mandatory as keyword separator.
• Numbers recognition support is greatly improved.
• Operators and delimiters can be longer than one character.
• The same characters can be used as comments AND operators.
• Comments and delimiters support nesting.
• Improvments to Comments (comment folding, comment continuation...etc).
• In the case of several comment pairs defined, comment open symbols match only with comment close symbols of the same order.

The key features of UDL2 are:

• More keyword groups were added (more syntax highlighting can be defined):
  • 3 folding groups
  • 8 keyword groups
  • 2 comment groups
  • 1 number definitons
  • 2 operators groups
  • 8 delimiter sets
• Multipart keywords are supported (for example: "else if" can be defined as a single keyword)
• Whitespace is no longer mandatory as keyword separator: Operators, Delimiters and Folding keywords can be recognized with or without whitespace separators.
• Numbers recognition support is greatly improved (prefix, suffix, range and extra symbols supported).
• Operators and delimiters can be longer than one character.
• The same characters can be used as comments AND operators.
• Comments and delimiters support nesting (even within each other).
• Improvments to Comments include:
  • Comment folding
  • Comment continuation
  • Comment only start at the beginning of line
•  In the case of several comment pairs defined, comment open symbols match only with comment close symbols of the same order. (for example: /* C comment */, /+ D comment +/, but not /* mixed comment +/)