The Raay or Rai is a forerunner of the Kloang and has the same unique tonal pattern. It is a chained verse, written with the end syllable of L1 rhymed with the beginning syllable of L2. It was often used to record laws and chronicle events in verse.
The Raay is
○ stanzaic, written in a series of couplets.
○ syllabic, 5 syllables per line.
○ chain rhymed, the last syllable of L1 rhymes with the first syllable of L2.
Pasted from http://www.poetrymagnumopus.com/index.php?showtopic=1035#chann
My thanks to Judi Van Gorder for years of work on this fine PMO resource.