This project has received funding from the European Union’s Seventh
Framework Programme for research, technological development and
demonstration under grant agreement no 261712.
The tokenizer tokenizes a text into sentences and words.
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 tokenizer can be done by executing:
gem install tokenizer
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 tokenizer 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.
Tokenizing some text:
echo "This is English text" | tokenizer -l en --no-kaf
Will result in
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<KAF version="v1.opener" xml:lang="en">
<kafHeader>
<linguisticProcessors layer="text">
<lp name="opener-sentence-splitter-en" timestamp="2013-05-31T11:39:31Z" version="0.0.1"/>
<lp name="opener-tokenizer-en" timestamp="2013-05-31T11:39:32Z" version="1.0.1"/>
</linguisticProcessors>
</kafHeader>
<text>
<wf length="4" offset="0" para="1" sent="1" wid="w1">This</wf>
<wf length="2" offset="5" para="1" sent="1" wid="w2">is</wf>
<wf length="7" offset="8" para="1" sent="1" wid="w3">English</wf>
<wf length="4" offset="16" para="1" sent="1" wid="w4">text</wf>
</text>
</KAF>
The available languages for tokenization are: English (en), German (de), Dutch (nl), French (fr), Spanish (es), Italian (it)
The tokenizer is capable of taking KAF as input, and actually does so by default. You can do so like this:
echo "<?xml version='1.0' encoding='UTF-8' standalone='no'?><KAF version='v1.opener' xml:lang='en'><raw>This is what I call, a test!</raw></KAF>" | tokenizer
Will result in
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<KAF version="v1.opener" xml:lang="en">
<kafHeader>
<linguisticProcessors layer="text">
<lp name="opener-sentence-splitter-en" timestamp="2013-05-31T11:39:31Z" version="0.0.1"/>
<lp name="opener-tokenizer-en" timestamp="2013-05-31T11:39:32Z" version="1.0.1"/>
</linguisticProcessors>
</kafHeader>
<text>
<wf length="4" offset="0" para="1" sent="1" wid="w1">this</wf>
<wf length="2" offset="5" para="1" sent="1" wid="w2">is</wf>
<wf length="2" offset="8" para="1" sent="1" wid="w3">an</wf>
<wf length="7" offset="11" para="1" sent="1" wid="w4">english</wf>
<wf length="4" offset="19" para="1" sent="1" wid="w5">text</wf>
</text>
</KAF>
If the argument -k (–kaf) is passed, then the argument -l (–language) is ignored.
You can launch a language identification webservice by executing:
tokenizer-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:
tokenizer-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 -h option.
Last but not least the tokenizer comes shipped with a daemon that can read jobs (and write) jobs to and from Amazon SQS queues. For more information type:
tokenizer-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:
The tokenizer module is a wrapping around a Perl script, which performs the actual tokenization based on rules (when to break a character sequence). The tokenizer already supports a lot of languages. Have a look to the core script to figure out how to extend to new languages.
The component is a fat wrapper around the actual language technology core. The core is a rule based tokenizer implemented in Perl. You can find the core technologies in the following repositories:
If you encounter problems, please email support@opener-project.eu or leave an issue in the issue tracker.
git checkout -b my-new-feature)git commit -am 'Add some feature')git push origin my-new-feature)Tokenizing KAF:
echo "<?xml version='1.0' encoding='UTF-8' standalone='no'?><KAF version='v1.opener' xml:lang='en'><raw>This is what I call, a test!</raw></KAF>" | tokenizer
Tokenizing some text:
echo "This is English text" | tokenizer -l en --no-kaf
You can launch a webservice by executing:
tokenizer-server
After launching the server, you can reach the webservice at http://localhost:9292.
The webservice takes several options that get passed along to Puma, the webserver used by the component. The options are:
-b, --bind URI URI to bind to (tcp://, unix://, ssl://)
-C, --config PATH Load PATH as a config file
--control URL The bind url to use for the control server
Use 'auto' to use temp unix server
--control-token TOKEN The token to use as authentication for the control server
-d, --daemon Daemonize the server into the background
--debug Log lowlevel debugging information
--dir DIR Change to DIR before starting
-e, --environment ENVIRONMENT The environment to run the Rack app on (default development)
-I, --include PATH Specify $LOAD_PATH directories
-p, --port PORT Define the TCP port to bind to
Use -b for more advanced options
--pidfile PATH Use PATH as a pidfile
--preload Preload the app. Cluster mode only
--prune-bundler Prune out the bundler env if possible
-q, --quiet Quiet down the output
-R, --restart-cmd CMD The puma command to run during a hot restart
Default: inferred
-S, --state PATH Where to store the state details
-t, --threads INT min:max threads to use (default 0:16)
--tcp-mode Run the app in raw TCP mode instead of HTTP mode
-V, --version Print the version information
-w, --workers COUNT Activate cluster mode: How many worker processes to create
--tag NAME Additional text to display in process listing
-h, --help Show help
The daemon has the default OpeNER daemon options. Being:
Usage: tokenizer-daemon <start|stop|restart> [options]
| When calling tokenizer without <start | stop | restart> the daemon will start as a foreground process |
Daemon options:
-i, --input QUEUE_NAME Input queue name
-o, --output QUEUE_NAME Output queue name
--batch-size COUNT Request x messages at once where x is between 1 and 10
--buffer-size COUNT Size of input and output buffer. Defaults to 4 * batch-size
--sleep-interval SECONDS The interval to sleep when the queue is empty (seconds)
-r, --readers COUNT number of reader threads
-w, --workers COUNT number of worker thread
-p, --writers COUNT number of writer / pusher threads
-l, --logfile, --log FILENAME Filename and path of logfile. Defaults to STDOUT
-P, --pidfile, --pid FILENAME Filename and path of pidfile. Defaults to /var/run/tokenizer.pid
--pidpath DIRNAME Directory where to put the PID file. Is Overwritten by --pid if that option is present
--debug Turn on debug log level
--relentless Be relentless, fail fast, fail hard, do not continue processing when encountering component errors
These daemons make use of Amazon SQS queues and other Amazon services. The access to these services and other environment variables can be configured using a .opener-daemons-env file in the home directory of the current user.
It is also possible to provide the environment variables directly to the daemon.
For example:
AWS_REGION='eu-west-1' tokenizer start [other options]
We advise to have the following environment variables available:
The tokenizer currently supports the following languages:
This project has received funding from the European Union’s Seventh
Framework Programme for research, technological development and
demonstration under grant agreement no 261712.