Linguistics is a framework for building linguistic utilities for Ruby objects in any language. It includes a generic language-independant front end, a module for mapping language codes into language names, and a module which contains various English-language utilities.
The Linguistics module comes with a language-independant mechanism for extending core Ruby classes with linguistic methods.
It consists of three parts: a core linguistics module which contains the class-extension framework for languages, a generic inflector class that serves as an extension point for linguistic methods on Ruby objects, and one or more language-specific modules which contain the actual linguistic functions.
The module works by adding a single instance method for each language named after the language's two-letter code (or three-letter code, if no two-letter code is defined by ISO639) to various Ruby classes. This allows many language-specific methods to be added to objects without cluttering up the interface or risking collision between them, albeit at the cost of three or four more characters per method invocation. For example:
.( :en ) "goose".en.plural # => "geese"
If you prefer monkeypatching (around 70) linguistics methods directly onto core classes, you can do that by adding a 'monkeypatch' option to ::use:
.( :en, monkeypatch: true ) "goose".plural # => "geese"
Controlling Which Classes Get Extended
If you should wish to extend classes other than the ones in
Linguistics::DEFAULT_EXT_CLASSES, you have a few options.
You can modify the DEFAULT_EXT_CLASSES array directly (before you call ::use, of course):
:: << MyClass
You can also pass an Array of classes to .use:
.( :en, classes: [MyClass] )
Or you can add language methods to classes via mixin:
class MyClass include :: end
All Linguistics methods use Ruby's casting mechanism, so at a minimum, your classes should provide an implementation of #to_s that returns words or phrases.
Adding Language Modules
To add a new language to the framework, define a module that will act as the top-level namespace for all your linguistic functions, and then register it as being available, like so:
module ::TLH # Add Klingon to the list of default languages .( :tlh, self ) end
The first argument is either the two- or three-letter [ISO 639.2] (www.loc.gov/standards/iso639-2/php/code_list.php) language code for the language you're registering.
The second is the container module itself.
After you register your language, each class that Linguistics is told to extend will have a method for your language code/s:
irb> .( :tlh, :classes => Object ) # => [Object] irb> Object.new.tlh # => #<(Klingon; tlhIngan-Hol-language inflector) for <Object:0x402d9674> >
If you use RSpec 2, you can test out any API requirements of the module by requiring 'linguistics/languagebehavior' and adding a shared behavior to your spec:
require 'rspec' require 'linguistics/languagebehavior' describe ::TLH do it_should_behave_like "a Linguistics language module" # ... any other specs for your module end
If you wish to use the logging subsystem set up by Linguistics, you can do so one of two ways: by logging to the logger directly:
.log.debug "Registering Klingon language extension"
or by mixing the `Linguistics::Loggable' module into your class/module, which will give you a 'log' method that prepends the object class on each log message so it's easy to filter out the ones you want:
require 'linguistics/mixins' class ::TLH::Generator include ::Loggable def generate_it self.log.debug "starting generation..." end end
English Language Module
Linguistics comes with an English-language module; see the API documentation for Linguistics::EN for more information about it.
Robert Berry (bdigital on github) - English conjugation ported from MorphAdorner
Ruby >= 1.9.3
It may work under earlier versions, but I'll only be testing it on 1.9.3 or later.
The English-language module for Linguistics has support for a few other optional natural-language libraries:
Ruby high-level interface to the CMU Link Grammar library
Adds integration for the Ruby binding for the WordNet® lexical refrence system.
After checking out the source, run:
$ rake newb
This task will install any missing dependencies, run the tests/specs, and generate the API documentation.
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