title: How to classify chat text when there is no Training data?
body: <p>I have a  use case in which chat text is to be classified. I want to use DocumentCategorizer in Apache OpenNLP to categorize chat. But for that i must have Training Data that should have Chats already classified. Do i have to manually categorize hundreds of chats to prepare Training and Test Data? What else can i do? I intend the chat categories to be service related PROBLEMS. This list of Categories would then be domain specific. Should the provider of this  data, provide me with the categorized chat data? 
  Thanks, in advance.</p>