UtteranceParser

A trainable natural language parser that extracts intent and entities from utterances.

It uses a Naive Bayes classifier to determine intent and Conditional random fields to extract entities.

For example, it can turn this:

Remind me to pick up the kids in two hours

into ...

[
  # intent
  "reminder",
  # entities
  {task: "pick up the kids", time: "in two hours"}
]

Installation

Add this line to your application's Gemfile:

gem 'utterance_parser'

And then execute:

$ bundle

Or install it yourself as:

$ gem install utterance_parser

Usage

parser = UtteranceParser.new

parser.train(
  # Utterance => intent
  "Hi" => "greeting",
  "Hello" => "greeting",

  "What time is it" => "time",
  "What's the weather outside" => "weather",

  # Mark entities using XML tags
  "Remind me to <task>get stuff done</task> <time>tomorrow</time>" => "reminder",
  "Remind me to <task>buy milk</task> <time>in one hour</time>" => "reminder",
  "Remind me to <task>pick up the kids</task> <time>in two hours</time>" => "reminder",

  "Play some <playlist>jazz</playlist>" => "play",
  "Play some <playlist>blues</playlist>" => "play",
  "Play some <playlist>rap</playlist>" => "play"
)

parser.parse "Hello there!"
# => ["greeting", {}]

parser.parse "Play some rock"
# => ["play", {playlist: "rock"}]

parser.parse "Remind me to buy stuff in three hours"
# => ["reminder", {task: "buy stuff", time: "in three hours"}]

Contributing

1. Fork it ( https://github.com/macournoyer/utterance_parser/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request