The SPAN rule, which must be placed inside a
        RULES tag, highlights text between a start and end
        string. The start and end strings are specified inside child elements of
        the SPAN tag. The following attributes are
        supported:
TYPE - The token type to highlight the
                span with. See the section called “Token Types” for a list
                of token types.
AT_LINE_START - If set to
                TRUE, the span will only be highlighted if
                the start sequence occurs at the beginning of a line.
AT_WHITESPACE_END - If set to
                TRUE, the span will only be highlighted if
                the start sequence is the first non-whitespace text in the
                line.
AT_WORD_START - If set to
                TRUE, the span will only be highlighted if
                the start sequence occurs at the beginning of a word.
DELEGATE - text inside the span will be
                highlighted with the specified ruleset. To delegate to a ruleset
                defined in the current mode, just specify its name. To delegate
                to a ruleset defined in another mode, specify a name of the form
                mode::ruleset
MATCH_TYPE - Controls how the start and
                end of the sequence will be highlighted. See the section called “The MATCH_TYPE Attribute” for more information.
ESCAPE - specifies a character sequence
                for escaping characters. The first character following the escape
                sequence is not considered as input for syntax highlighting,
                thus being highlighted with rule's token.
                
NO_LINE_BREAK - If set to
                TRUE, the span will not cross line
                breaks.
NO_WORD_BREAK - If set to
                TRUE, the span will not cross word
                breaks.
Note that the AT_LINE_START,
        AT_WHITESPACE_END and
        AT_WORD_START attributes can also be used on the
        END element.
Here is a SPAN that highlights Java string
        literals, which cannot include line breaks:
<SPAN TYPE="LITERAL1" NO_LINE_BREAK="TRUE"> <BEGIN>"</BEGIN> <END>"</END> </SPAN>
Here is a SPAN that highlights Java
        documentation comments by delegating to the “JAVADOC”
        ruleset defined elsewhere in the current mode:
<SPAN TYPE="COMMENT2" DELEGATE="JAVADOC"> <BEGIN>/**</BEGIN> <END>*/</END> </SPAN>
Here is a SPAN that highlights HTML cascading
        stylesheets inside <STYLE> tags by delegating
        to the main ruleset in the CSS edit mode:
<SPAN TYPE="MARKUP" DELEGATE="css::MAIN"> <BEGIN><style></BEGIN> <END></style></END> </SPAN>