The KEYWORDS tag, which must be placed inside a
RULES tag and can only appear once, specifies a list of
keywords to highlight.
Keywords are similar to SEQs, except that
SEQs match anywhere in the text, whereas keywords only
match whole words. Words are considered to be runs of text separated by
non-alphanumeric characters.
The KEYWORDS tag does not define any attributes.
Each child element of the KEYWORDS tag is an element
whose name is a token type, and whose content is the keyword to
highlight. For example, the following rule highlights the most common Java
keywords:
<KEYWORDS> <KEYWORD1>if</KEYWORD1> <KEYWORD1>else</KEYWORD1> <KEYWORD3>int</KEYWORD3> <KEYWORD3>void</KEYWORD3> </KEYWORDS>