View source for Talk:Improving Knowledge-Based Weakly Supervised Information Extraction

== Freebase ==
[http://www.freebase.com/home Freebase] is a repository of structured data of almost 22 million entities. It's been used as the knowledge base for Google.
=== Example === 
* [http://www.freebase.com/view/en/ronaldinho Ronaldinho(soccer player)]
* [http://www.freebase.com/view/en/pittsburgh Pittsburgh(city)]
* [http://www.freebase.com/view/en/the_dark_knight The Dark Knight(film)]
===Data Access===
Freebase data is available through either '''API''' or '''data dump'''.
====Dump====
Follow instructions [http://wiki.freebase.com/wiki/Data_dumps here] to download the dumped dataset. Size of the data is around 3.5 Gbytes compressed (35 Gbytes uncompressed). 
====API====
Freebase data can be accessed through [http://wiki.freebase.com/wiki/MQL Metaweb Query Language(MQL)], and open through http GET. One example is:
 http://api.freebase.com/api/service/mqlread?query={%22query%22:{%22type%22:%22/music/artist%22%2C%22name%22:%22The%20Police%22%2C%22album%22:%5B%5D}}
Query and return values are composed in JSON format, which can be easily handled by most programming languages. For example, for the following query:
 {
  "query": {
    "type":"/music/artist",
    "name":"The Police",
    "album":[]
  }
 }
The return value comes: 
 {
   "code": "/api/status/ok",
   "result": {
     "album": [
       "Outlandos d'Amour",
       "Reggatta de Blanc",
       "Zenyatt\u00e0 Mondatta",
       "Ghost in the Machine",
       "Synchronicity",
       "Every Breath You Take: The Singles",
       ...
     ],
     "name": "The Police",
     "type": "/music/artist"
   },
   "status": "200 OK",
   "transaction_id": "cache;cache03.p01.sjc1:8101;2011-10-12T03:48:44Z;0018"
 }
Where there is a 'null' or '[]', data is returned from freebase.

Freebase provides a [http://www.freebase.com/queryeditor MQL query editor] for generating queries. 
=== Reference ===
* [http://wiki.freebase.com/wiki/Developers Freebase for Developers]
* [http://wiki.freebase.com/wiki/Data_dumps Freebase Dump]
* [http://wiki.freebase.com/wiki/Libraries Libraries for different programming language]
* [http://wiki.freebase.com/wiki/Read_API_Code_Snippets Code Snippets for different programming language]

--posted by [[User:Wpang|Wpang]] 03:55, 12 October 2011 (UTC)

===Freebase Wikipedia Extraction (WEX)===
Google provide a open source tool [http://wiki.freebase.com/wiki/WEX Freebase Wikipedia Extraction (WEX)] in processing dump of English language Wikipedia page. Please help with understanding the functionality of this tool. 

--posted by [[User:Wpang|Wpang]] 04:02, 12 October 2011 (UTC)