tbl_term
| term_id | term |
| 1 | ipod |
| 2 | apple |
| 3 | nano |
| 4 | iphone |
tbl_doc
| doc_id | text_content | uptime |
| 1 | 【蘋果先生】Moshi iGlaze Apple iPhone 3G 專用保護殼 黑/紅/白 | … |
| 2 | iTunes Gift Card蘋果線上音樂商店預付卡儲值Apple iTunes Shop Ipod Nano Shuffle iphone Mp3電影歌曲下載促銷 | … |
| 3 | Apple iPhone 3G (8G) |
tbl_lookup
| id | term_id | doc_id |
| 1 | 2 | 1 |
| 2 | 4 | 1 |
| 3 | 2 | 2 |
| 4 | 1 | 2 |
| 5 | 3 | 2 |
| 6 | 4 | 2 |
| 7 | 2 | 3 |
| 8 | 4 | 3 |