/** \struct boost::bimaps::relation::support::is_tag_of_member_at_left
-\brief Metafunction to test if a user tag is refering to the left member.
+\brief Metafunction to test if a user tag is referring to the left member.
\code
/** \struct boost::bimaps::relation::support::is_tag_of_member_at_right
-\brief Metafunction to test if a user tag is refering to the left member.
+\brief Metafunction to test if a user tag is referring to the left member.
\code