The details on how to enter refrains in the wiki (http://www.hymnary.org/wiki/Full_texts) are fine as far as they go, but they don't go far enough.
The example given shows the refrain appearing after the first stanza, but how does one treat the refrain after subsequent stanzas? Four possible ways suggest themselves to me, and there may be others:
(1) Note the refrain at the end of the last line of the stanza with "(Refrain)" or "[Refrain]" or simply "Refrain". See http://www.hymnary.org/hymn/GATHER/348, http://www.hymnary.org/hymn/EH1982/87 [But note the brackets improperly used in the latter when the refrain is printed after stanza one!], and http://www.hymnary.org/hymn/PsH/345.
(2) After the last line of the stanza, include "Refrain" on the following line all by itself.
(3) After the last line of the stanza, enter a blank line, then "Refrain".
(4) Do not include anything at all, on the assumption that the refrain is repeated after every stanza. See http://www.hymnary.org/hymn/PH/31
Beyond these variations in style, other apparent errors are also present, such as at http://www.hymnary.org/hymn/TWC/171 where the initial appearance of the refrain is improperly headed "[Refrain:]" instead of simply "Refrain:" and at http://www.hymnary.org/hymn/UMH/240 where the refrain is not separated out from the text at all.
Obviously, these variations and errors are something we need to straighten out -- and need to do so quickly, as we already have differences in the way refrains are handled in the relatively few hymns and hymnals currently entered.