º ˜(>‡„R ¿ è# )s˜‚éÐ üë\ l Á¦ ßÓZþ9PŸ[email protected]¡òÑ Ì æ™˜ÚûÏiêšB*Mj'ãùï6B9I‘Û › p–¾3 Û>Tl« Ùw},^w†Ñ¢ ›U-æ ϶‰ößdŸÑ:zN)¹ë®©‘$ïXïFÞ‰ þOc›Þ7¦…× ¯OEý*3 Qã ÎCÑø 5åÄ.é‡ »^ qt‡?f‡HÒ²Ù’@S2/õ~K#Ö× u9¬¹¶× óG„Û‘×^B õ±u ×ÑWeI' FÈUV 2%v t oß ... In many domains, users interact with data stored in large, and often structured, data sources. This thesis addresses three phases of user interaction: (1) data exploration, (2) query composition, (3) and query answer analysis. It provides methods to assist in each of these phases, though, of course, no single thesis could be broad enough to cover all possible user interaction in these phases ...