They mean exactly as you have just explained yourself.  The letters themselves represent the rhyming words at the end of each line -- the rhyme scheme.

The CAPITAL letters indicate that there is not merely a rhyme, but a repetition of that rhyming line as a whole.

The A (or A₁) is the first a-line.
The A₂ is the second a-line.

The B (or B₁) is the first b-line.
The B₂ is the second b-line.


... so basically, just make a bee-line to the examples and write one of your own using one of them as a pattern for yourself.  [ That's often how I do it; then learn the rules afterwards, after I get the concept! ]

always sLightly confused myself -- even by my own directions, Daniel  8)

I'm not quite sure I've answered what you're asking (by modifying the explanation in the thread), Perce.  Please forgive my lack of perception and communication if it's still not clear.

I don't know if this will help, by comparing, but this was my own first attempt at the form:


No Title Match

A poem wrestled from my tongue
to pin its strains upon the mat,
escapes a brain-lock, still is wrung
‘til Uncle sings a lyric scat.

From ring-side seats (That’s all there are.)
a chant of victory is sung
Huzzah! Huzzah!  My word… the star…
a poem wrestled from my tongue!

I stand; my mouth is open wide…
this started out a friendly chat
‘twixt me and some thing penned inside
to pin its strains upon the mat.

But now it’s framed inside a ring;
these revelers shout Hey, well-hung!
Poetic icon bends to swing,
escapes a brain-lock, still… is wrung.

Those sinews twist inside my breast;
a battle rages, tit for tat.
They wrangle on; there’ll be no rest
‘til Uncle sings a lyric scat.

© MLee Dickens’son 13 Jan 2006

Quatrain Refrain

Quatrain Refrain is a form reminiscent of a quatern, that was invented in 2006 by Liz DiBenidetto ( poetprncess ) of Mosaic Musings and Poetry 911  and was aptly named by Lori Kanter of MM.

The basic form:

QR contains 5 stanzas, each a quatrain (four lines) in either Iambic Pentameter, Iambic Tetrameter or Iambic Trimeter (= either 5, 4 or 3 daDUMs), following a specific rhyme and REPEAT scheme:
 
aba₂b₂
cacA
dbdB
eaeA₂
fbfB₂

Here's Liz's first offering:

( color added to show repeated lines and bold to show the rhymes ):

Sojourn

A candle quivers on the sill,
inviting all who happen by.
Although so many pass at will,
yet still, the doorknob goes untried. 

At dusk, the hearth is kindled bright,
a pot of coffee freshly filled,
and biscuits baked. Her wick ignites;
a candle quivers on the sill.

She sits and stares, as shadows dance
into the black of midnight sky,
in hopes her flicker will entrance;
inviting all who happen by. 

The winter's wind has been no friend
to Beauty Belle, who's fallen ill.
She waits alone till evening's end,
although so many pass at will.

Tonight, she dreamed of love's embrace;
with breathless body, slowly she died.
No candle burns, no hearth, no grace...
yet still, the doorknob goes untried.

© Liz DiBenidetto 2006
used by permission