ckanext-csvtocsvw

Extension automatically generating csvw metadata for uploaded textual tabular data. It uploads the data of the first table documented into a datastore for the source csv file. should be used as replacement for datapusher

Requirements

Needs a running instance of the CSVToCSVW Application. Point at it through env variables. Also needed is a Api Token for an account with the right privaledges to make the background job work on private datasets and ressources.

CKANINI__CKANEXT__CSVTOCSVW_URL=http://${CSVTOCSVW_HOST}:${CSVTOCSVW_APP_PORT}
CKANINI__CKANEXT__CSVTOCSVW__CKAN_TOKEN=${CKAN_API_TOKEN}

You can set the default formats to annotate by setting the env variable CSVTOCSVW_FORMATS for example

CKANINI__CKANEXT__CSVTOCSVW__FORMATS="csv txt asc"

else it will react to the following formats: "csv", "txt", "asc", "tsv"

If you need to process files that are not hosted through https (CKAN is not ssl configured), you can disable ssl verification

CKANINI__CKANEXT__CSVTOCSVW__SSL_VERIFY=False

Purpose

Reacts to CSV files uploaded. DEFAULT_FORMATS are "csv; txt" It creates two to sites for each resource.

• /annotate creates CSVW annotation file for a CSV in json-ld format named <csv_filename>-metadata.json, uploades table-1 to ckan datastore o u can explorer it with recline views
• /transform utilizes CSVW metadata to transform the whole content of the csv file to rdf, output is <csv_filename>.ttl The plugins default behavior includes a trigger to csv file uploads, so it runs annotation automatically on upload. The transformation is a bonus feature and outputs standard tabular data as mentioned in the CSVW documentation of the W3C. It must be triggered manually.

Compatibility with core CKAN versions:

CKAN version	Compatible?
2.9 and arlier	not tested
2.10	yes
2.11	yes

• "yes"
• "not tested" - I can't think of a reason why it wouldn't work
• "not yet" - there is an intention to get it working
• "no"

Installation

To install the extension:

1. Activate your CKAN virtual environment, for example:

. /usr/lib/ckan/default/bin/activate

2. Use pip to install package

pip install ckanext-csvtocsvw

3. Add csvtocsvw to the ckan.plugins setting in your CKAN    config file (by default the config file is located at    /etc/ckan/default/ckan.ini).

4. Restart CKAN. For example, if you've deployed CKAN with Apache on Ubuntu:

sudo service apache2 reload

Developer installation

To install ckanext-csvtocsvw for development, activate your CKAN virtualenv and do:

git clone https://github.com/Mat-O-Lab/ckanext-csvtocsvw.git
cd ckanext-csvtocsvw
python setup.py develop
pip install -r dev-requirements.txt

Tests

To run the tests, do:

pytest --ckan-ini=test.ini

License

AGPL

Acknowledgments

The authors would like to thank the Federal Government and the Heads of Government of the Länder for their funding and support within the framework of the Platform Material Digital consortium. Funded by the German Federal Ministry of Education and Research (BMBF) through the MaterialDigital Call in Project KupferDigital - project id 13XP5119.