...language-sensitive

It checks for `conservation of code blocks' (for example, matching parentheses in Fortran), allows cursor positioning based on program blocks (for example, `goto the start of the next subroutine') and provides automatic numbering and source code alignment. More advanced features such as syntax checking and integrated code compilation are available, but have not been extensively investigated by anyone within DØ.

...developed.

Additional extensions might include custom color-coding displayed source code or embedding links to text or voice descriptions into source code.