multi-line rule - is it possible?

[hostfast]

Hello,

is it possible to split the meta rule into several lines?
the rule is quite long and it would be more visible to me if it was possible to write in several lines, example:

is:
meta RULE01 __A || __B || __C || __D || __E ...... || __F

I would like it to be, for example:
meta RULE01 __A || __B || __C || __D || __E || __F

Regards