Hymnal octave

In any kind of poetry
there should be one demand –
self-evident as it might be
the verse must be at hand.
A fashion is compulsory.
Of no use is the bland – 
the poet by a misery.
So being is not grand.

As I understand it, the hymnal octave is quite similar to the common octave. Also in the hymnal octave lines of common measure is put together to form a poem of eight lines. But the rhyme scheme is different. The rhyme scheme of the hymnal octave is
| abababab |.