In jEdit 4.1, the mode file grammar has been cleaned up somewhat. As a result, some edit modes written for jEdit 4.0 and earlier need to be updated:
Defining <WHITESPACE> rules is no longer necessary
and doing so will print warnings to the activity logs.
The <KEYWORDS> tag no longer accepts an
IGNORE_CASE attribute.
Set the IGNORE_CASE attribute of the
<RULES> tag instead.
The <END> tag of the <SPAN> rule
used to be optional, in which case
any occurrence of the start string would cause the remainder of the buffer
to be highlighted with the span. In jEdit 4.1, the <END>
tag can no longer be omitted, however
a <SEQ> tag with a DELEGATE attribute
can be used to achieve the same effect as endless span.
Defining <SEQ TYPE="NULL"> rules for word separators
is no longer necessary. Now, any non-alphanumeric character not appearing in
a keyword definition or the ruleset's NO_WORD_SEP attribute
is considered a word separator.