This repository contains the code for the OpeNER polarity tagger. This tool tags words in a KAF file with polarity information, which basically is:
- Polarity information, which represents positive or negative facts in a certain domain. Good, cheap and clean can be positive words in a hotel domain, while bad, expensive and dirty could be negative ones.
- Sentiment modifiers, which modify the polarity of a surrounding polarity word. For instance very or no are sentiment modifiers
The polarity tagger supports the following languages:
- Dutch
- German
- English
- French
- Italian
- Spanish
The main script of this tool is a python file, which accepts a set of parameters
to determine which features or options we want to use. The language is read from
the KAF file, so it doesn't need to be specified as a parameter The program
reads a KAF file from the standard input and writes the resulting KAf in the
standard output. To see the options you can call to the main script with the -h
or --help option.
$ python core/poltagger-basic-multi.py -h
usage: poltagger-basic-multi.py [-h] [--no-time] [--ignore-pos]
[--show-lexicons {nl,en,de,es,it,fr}]
[--lexicon LEXICON] [--silent] [--version]
Tags a text with polarities at lemma level
optional arguments:
-h, --help show this help message and exit
--no-time For not including timestamp in header
--ignore-pos Ignore the pos labels
--show-lexicons {nl,en,de,es,it,fr}
Show lexicons for the given language and exit
--lexicon LEXICON Lexicon identifier, check with --show-lexicons LANG
for options
--lexicon-path LEXICON The path of the lexicons
--silent Turn off debug info
--version show program's version number and exit
The --ignore-pos parameter must be used when want to ignore the part-of-speech
information assigned to the lemmas, and we want to assign polarities just to the
lemmas, not considering the POS tag. This could be useful when the information
provided by the pos-tagger is not accurate or the pos-tagging has not been
processed.
The main options are those concerning with the usage of different lexicons. The lexicons are provided by the VU-sentiment-lexicon library (https://github.com/opener-project/VU-sentiment-lexicon), which needs to be installed. You can see what the lexicons available for a given language are by calling to the program with the option --show-lexicons LANG, for instance:
core/poltagger-basic-multi.py --show-lexicons nl
##############################
Available lexicons for nl
Identifier: "hotel" (Default)
Desc: Hotel domain lexicon for Dutch
Res: VUA_olery_lexicon_nl_lmf
File: /Users/ruben/python_envs/python2.7/lib/python2.7/VUSentimentLexicon/NL-lexicon/Sentiment-Dutch-HotelDomain.xml
Identifier:"general"
Desc: General lexicon for Dutch
Res: VUA_olery_lexicon_nl_lmf
File: /Users/ruben/python_envs/python2.7/lib/python2.7/VUSentimentLexicon/NL-lexicon/Sentiment-Dutch-general.xml
##############################
Then you can use the lexicon identifiers to select the proper lexicon, with the option --lexicon
cat my_input.nl.kaf | core/poltagger-basic-multi.py --lexicon general
This command will call to the polarity tagger using the general lexicon for Dutch. The lexicon identifiers are unique only per language. If the lexicon id is not specified(you skip the --lexicon option), or you provide a wrong identifier, the default lexicon will be loaded. If there is no lexicon marked as default in the --show-lexicon options, the first one in the list will be used. Check the VU-sentiment-lexicon for further information about how to manage lexicons and add new ones.
This software is part of a larger collection of natural language processing tools known as "the OpeNER project". You can find more information about the project at the OpeNER portal. There you can also find references to terms like KAF (an XML standard to represent linguistic annotations in texts), component, cores, scenario's and pipelines.
Installing the polarity-tagger can be done by executing:
gem install opener-polarity-tagger
The polarity tagger uses python. So it is advised to run a virtualenv before installing the gem.
Please bare in mind that all components in OpeNER take KAF as an input and output KAF by default.
You should now be able to call the polarity tagger as a regular shell command: by its name. Once installed the gem normally sits in your path so you can call it directly from anywhere.
This aplication reads a text from standard input in order process it.
cat some_kind_of_kaf_file.kaf | polarity-tagger
This will output:
<term lemma="donner" morphofeat="VP3s" pos="V" tid="t119" type="open">
<span>
<!--donne-->
<target id="w119"/>
</span>
<sentiment polarity="neutral" resource="General domain lexicon for French . Vicomtech_general_lexicon_french"/>
</term>
- Python 2.7.0 or newer
- Ruby 1.9.2 or newer
- pip
- libxml2
You can launch a webservice by executing:
polarity-tagger-server
This will launch a mini webserver with the webservice. It defaults to port 9292, so you can access it at http://localhost:9292.
To launch it on a different port provide the -p [port-number] option like this:
polarity-tagger-server -p 1234
It then launches at http://localhost:1234
Documentation on the Webservice is provided by surfing to the urls provided
above. For more information on how to launch a webservice run the command with
the --help option.
Last but not least the polarity tagger comes shipped with a daemon that can read jobs (and write) jobs to and from Amazon SQS queues. For more information type:
polarity-tagger-daemon -h
This component runs best if you run it in an environment suited for OpeNER components. You can find an installation guide and helper tools in the OpeNER installer and an installation guide on the Opener Website
At least you need the following system setup:
- Ruby 1.9.3 or newer
- Python 2.6 or newer
- lxml installed
- libarchive, on Debian/Ubuntu based systems this can be installed using
sudo apt-get install libarchive-dev - VUKafParserPy, install with sudo pip install 'https://github.com/opener-project/VU-kaf-parser/archive/v1.1.zip#egg=VUKafParserPy'
TODO
TODO
The component is a wrapper around the actual language technology core. You
can find the core technolies in the core/ folder.
If you encounter problems, please email [email protected] or leave an issue in the issue tracker.
- Fork it http://github.com/opener-project/polarity-tagger/fork
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request