KOREAN POETRY
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HYANGGA
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Hyangga poetry refers to vernacular Korean poetry which transcribed Korean sounds using Chinese characters (similar to the idu system, the hyangga style of transcription is called hyangch'al) and is characteristic of the literature of Unified Silla. It is one of the first uniquely Korean forms of poetry. The Koryo period Samguk Yusa contains 14 poems that have been preserved to the present day. These are thought to have been taken by Ilyon (compiler of Samguk Yusa) from an anthology called the Samdaemok(삼대목/三代目) which was completed during the Shilla period, in 888 (according to Samguk Sagi), but is no longer extant today. This lost anthology is thought to have contained approximately 1,000 hyangga. Eleven poems from the later Goryeo Dynasty Gyunyeojeon (균여전/均如傳), characterized by the same style, have also been preserved.
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GORYEO SONGS
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The Goryeo period was marked by a growing use of Chinese characters. Hyangga largely disappeared as a form of Korean literature, and "Goryeo songs" (Goryeo gayo) became more popular. Most of the Goryeo songs were transmitted orally and many survived into the Joseon period, when some of them were written down using hangul.
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SIJO
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With the rise of Joseon nationalism (starting in 1392), three-line poetry, called sijo, became more popular and reached its apex in the late 18th century. Sijo is a modern term for what was then called dan-ga (literally, "short song").
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GASA
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Gasa is a form of verse, although its content can include more than the expression of