listed-price
 $250,000
 $110,000
   ...
 address      price     agent-phone     description
Example: Matching Real-Estate Sources
 location
 Miami, FL
 Boston, MA
   ...
      phone
(305) 729 0831
(617) 253 1429
  ...
   comments
Fantastic house
Great location
  ...
realestate.com
 location     listed-price     phone       comments
Schema of realestate.com
If “fantastic” &
“great”
occur frequently
in data values =>
description
Learned hypotheses
    price
 $550,000
 $320,000
   ...
 contact-phone
(278) 345 7215
(617) 335 2315
  ...
   extra-info
Beautiful yard
Great beach
  ...
homes.com
If “phone” occurs
in the name =>
agent-phone
Mediated schema
Points:
1) Introduce our approach.
2) We do not manually map the schemas of all sources to mediated schema.
The goal is to manually mark up only a few sources, and be able to learn from the marked up sources to successfully propose mappings for subsequent sources.
3) Once the markup is done,  there are many different types of information to learn from.