doc/modules/cassandra/examples/BNF/identifier.bnf - cassandra - Git at Google

 identifier::= unquoted_identifier | quoted_identifier
 unquoted_identifier::= re('[a-zA-Z][link:[a-zA-Z0-9]]*')
 quoted_identifier::= '"' (any character where " can appear if doubled)+ '"'
	identifier::= unquoted_identifier \| quoted_identifier
	unquoted_identifier::= re('[a-zA-Z][link:[a-zA-Z0-9]]*')
	quoted_identifier::= '"' (any character where " can appear if doubled)+ '"'