À̼®±Õ ´Ü±¹´ë(Á×Àü) °ø°ú´ë ¼ÒÇÁÆ®¿þ¾îÇаú ±³¼ö´Â ¼¿ï´ëÇб³ °æÁ¦Çаú¸¦ Á¹¾÷ÇÏ°í ¹Ì±¹ ¾ÆÀÌ¿À¿Í´ëÇб³¿¡¼ ¼®»ç ¹× ¹Ú»ç ÇÐÀ§¸¦ ¹Þ¾Ò´Ù. ÇÐÀ§³í¹®Àº "An A.I. Approach to Relational Data Models for uncertain and Imprecise Information"ÀÌ´Ù. 1992³â International Conference on Data Engineering¿¡¼ ÃÖ¿ì¼ö ³í¹®»óÀ» ¼ö»óÇϱ⵵ Çß´Ù. ¼® ±³¼ö´Â ¼¼Á¾´ëÇб³ Á¤º¸Ã³¸®Çаú¿¡¼ ±³¼ö·Î ÀçÀÓÇÑ µÚ 1997³â ´Ü±¹´ë ¼ÒÇÁÆ®¿þ¾îÇаú ±³¼ö·Î ºÎÀÓÇÏ¿´´Ù. ±×ÀÇ ¿¬±¸ ºÐ¾ß´Â °´Ã¼ÁöÇâ µ¥ÀÌÅͺ£À̽º, ½Ç½Ã°£ ½ºÄÉÁÙ¸µ, µ¥ÀÌÅͺ£À̽º¸¦ À§ÇÑ ½Ã°¢ ÁúÀǾî, XML ¹× À¥ ÀÀ¿ë, °¡¼Óµµ ¼¾¼¸¦ »ç¿ëÇÑ µ¿ÀÛ ÀνÄ, ±â°èÇнÀ µîÀÌ´Ù. ÇöÀç Çб³¿¡¼ µ¥ÀÌÅͺ£À̽º ºÐ¾ßÀÇ °ú¸ñµé ¹× ´Ù¾çÇÑ ÇÁ·Î±×·¡¹Ö °ú¸ñµéÀ» °ÀÇÇϰí ÀÖ´Ù.