Controlled Vocabulary

There are several things come to mind when we hear about Controlled Vocabulary. In order to simplify my thoughts about controlled vocabularies , I planed to capture it in my blog:

• What is Controlled Vocabulary
  
• Why do we need them in our real life
• How can you build Controlled Vocabulary

At the beginning, controlled vocabulary is one kind of database, ontology , thesaurus, Yellow Pages, classification schema etc. The simple definition of controlled vocabulary is a set of concepts and their relationship.

CV= Concepts + Relationship

For example, In flickr , if people tags their photos according to predefined keyword then it is easy to get the information. one person gives keyword "Trento" and put all the picture under the treno. Here Trento is working as controlled word.

There are many applications are exiting of Controlled vocabularies:

• Information Extraction
  
• Information browsing
  
• Searching information
  

There are several approaches to build Controlled Vocabularies. I will define it next time.. going to run now.. ..:(