Property Tagger

This module implements a tagger for hotel properties for Dutch, English, French, Italian, Spanish and German. It detects aspect words, for instance words related with "room", "cleanliness", "staff" or "breakfast" and links them with the correct aspect class. The input for this module has to be a valid KAF file with at lest the term layer, as the lemmas will be used for detecting the hotel properties. The output is also a KAF valid file extended with the property layer. This module works for all the languages within the OpeNER project (en,de,nl,fr,es,it) and the language is read from the input KAF file, from the lang attribute of the KAF element (make sure your preprocessors set properly this value or you might use the resources for a wrong language)

Confused by some terminology?

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.

Quick Use Example

Keep in mind that this component uses PYTHON so it's advised to make sure you have a virtualenv activated before installing.

Installing the property-tagger can be done by executing:

gem install opener-property-tagger

Please keep in mind that all components in OpeNER take KAF as an input and output KAF by default.

Command line interface

You should now be able to call the property 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 application reads a text from standard input in order process it.

cat some_kind_of_kaf_file.kaf | property-tagger --resource-path /path/to/lexicons/

The property tagger will search in the resource-path for files named {language_code}.txt, for example en.txt.

An excerpt of a potential output would than be:

<features>
    <properties>
        <property pid="p1" lemma="cleanliness">
            <references>
                <!--dirty-->
                <span>
                    <target id="t_12"/>
                </span>
            </references>
        </property>
        <property pid="p2" lemma="sleeping_comfort">
            <references>
                <!--bed-->
                <span>
                    <target id="t_10"/>
                </span>
            </references>
        </property>
        <property pid="p3" lemma="staff">
            <references>
                <!--staff-->
                <span>
                    <target id="t_16"/>
                </span>
                <!--friendly-->
                <span>
                    <target id="t_20"/>
                </span>
            </references>
        </property>
    </properties>
</features>

Webservices

You can launch a webservice by executing:

property-tagger-server --resource-path /path/to/resources

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:

property-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.

Daemon

Last but not least the property tagger comes shipped with a daemon that can read jobs (and write) jobs to and from Amazon SQS queues. For more information type:

property-tagger-daemon --help

Description of dependencies

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:

Depenencies for normal use:

Ruby 1.9.3 or newer
libarchive (for running the tests and such), on Debian/Ubuntu based systems this can be installed using sudo apt-get install libarchive-dev

Domain Adaption and Language Extension

The lexicons in the resource path must be stored in a file and follow this format:

surf    verb    facilities
surfer  noun    facilities
surfing verb    facilities

So, one aspect per line, with 3 fields separated by a tabulator, the first one is the word or span of words (in this case use whitespaces), then the part of speech (which actually it is not use, you can include a dummy label) and finally the aspect class associated with the word.

Where to go from here

Report problem/Get help

If you encounter problems, please email [email protected] or leave an issue in the issue tracker.

Contributing

Fork it http://github.com/opener-project/property-tagger/fork
2. 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