Hunminjeongeum
Hunminjeongeum (lit. The Correct/Proper Sounds for the Instruction of the People) is a document describing an entirely new and native script for the Korean language. The script was initially named after the publication, but later came to be known as hangul. It was created so that the common people illiterate in hanja could accurately and easily read and write the Korean language. It was announced in Volume 102 of the Annals of King Sejong, and its formal supposed publication date, October 9, 1446, is now Hangul Day in South Korea. The Annals place its invention to the 25th year of Sejong's reign, corresponding to 1443-1444.
Content
The publication is written in Classical Chinese and contains a preface, the alphabet letters (jamo), and brief descriptions of their corresponding sounds. It is later supplemented by a longer document called Hunminjeongeum Haerye that is designated as a national treasure No. 70. To distinguish it from its supplement, Hunminjeongeum is sometimes called the "Samples and Significance Edition of Hunminjeongeum" (훈민정음예의본; 訓民正音例義本).