Rubaʿi the convention is sometimes extended so that the unrhymed line of the current stanza becomes the rhyme for the following stanza. The structure can be made cyclical by linking the unrhymed line of the final stanza back to the first stanza: ZZAZ. These more stringent systems were not, however, used by FitzGerald in his "Rubaiyat". Rubaʿi Rubāʿī (from "rubāʿiyy", plural "rubāʿiyāt") is the term for a quatrain, a poem or a verse of a poem consisting of four lines. It refers specifically to a form of Persian poetry, or its derivative form in English and other languages In classical Persian
Regulated verse are rhymed on the even lines, with one rhyme being used throughout the poem. Also, and definitionally, the tonal profile of the poem is controlled (that is, "regulated"). Furthermore, semantic and tonal parallelism is generally required of certain interior couplets. During the Tang Dynasty, the "Shen-Song" team of Shen Quanqi and Song Zhiwen greatly contributed to the development of this Classical Chinese verse form. Regulated verse consisting of the three "jintishi" or "new style poetry" forms of "lushi", "jueju", and "pailu" while retaining the basic characteristics that are distinguished from the "gushi" or "old style poetry" by the addition of