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Grobid Quantities is a Java library used to recognize is a module of Grobid specialised on the recognition of any expressions of measurements (e.g. pressure, temperature, etc.) in textual documents , parse, normalize and finally convert the measurements into SI units. It can be used on technical and scientific articles (text, XML and PDF input) and patents (text and XML input). such as PDF publications.
Measurements are parsed normalised and converted into SI units.
To use its capabilities with Tika, one must install the server endpoint created for Grobid Quantities to extract measurement units from text passed to it.
Installation
Steps to install: Install Grobid Quantities by following the steps from github and make sure the quantity model is trained as per the instructions provided
After installing and training the model, start the REST server using the following command
Start Grobid Quantities Server
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Installing Grobid-quantities
The best approach is to run Grobid-quantities via docker.
TLDR: The following command will start the grobid-quantities image on port 8060 (the default port for grobid-quantities):
docker run -t --rm --init -p 8060:8060 lfoppiano/grobid-quantities:${latest_grobid_quantities_version}
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The server starts by default on port number 8080 8060 and the server can be seen running on http://127.0.0.1:80808060.
Preparing resources for Grobid
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-quantities in Tika-App
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The resources to be created are 2 files:
tika-config.xml
and GrobidServer.properties
Create Tika-config.xml
In order to use any of the NamedEntityParser implementations in Tika, the parser responsible for handling the name recognition task needs to be enabled.
This can be done
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by creating the tika-config.xml
file, as follows:
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<?xml version="1.0" encoding="UTF-8"?>
<properties>
<parsers>
<parser class="org.apache.tika.parser.ner.NamedEntityParser">
<mime>text/plain</mime>
<mime>text/html</mime>
<mime>application/xhtml+xml</mime>
</parser>
</parsers>
</properties>
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This configuration has to be supplied
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later
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Create GrobidServer.properties
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It is imperative that Tika should know on what host you are running the grobid-quantities-server. By default, Tika will assume your server runs on port
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8060.
In order to specify any other port, you must supply a GrobidServer.properties file. Sample GrobidServer.properties file. My file looks like the following:
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grobid.server.url=http://localhost: |
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8060 grobid.endpoint.text=/processQuantityText |
In a nutshell
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#Create a directory for keeping the config and properties file.
export GROBID_QUANTITIES_RES=$HOME/GrobidQuantitiesRest-resources
mkdir -p $GROBID_QUANTITIES_RES
cd $GROBID_QUANTITIES_RES
#config file must be stored in this directory
pwd
export PATH_PREFIX="$GROBID_QUANTITIES_RES/org/apache/tika/parser/ner/grobid"
mkdir -p $PATH_PREFIX
#create and edit the properties file
vim $PATH_PREFIX/GrobidServer.properties
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Running Grobid Quantities with Tika
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export TIKA_APP={your/path/to/tika-app}/target/tika-app-1.13-SNAPSHOT.jar
#set the system property to use GrobidNERecogniser class
java -Dner.impl.class=org.apache.tika.parser.ner.grobid.GrobidNERecogniser -classpath $GROBID_QUANTITIES_RES:$TIKA_APP org.apache.tika.cli.TikaCLI --config=$GROBID_QUANTITIES_RES/tika-config.xml -m https://en.wikipedia.org/wiki/Time
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