labelify

labelify is a Python module and command line utility that identifies unlabelled resources in a graph. It is highly configurable and works on a number of different RDF data sources.

Installation

labelify is on PyPI at https://pypi.org/project/labelify/ so:

pip install labelify

or

poetry add labelify

will install it.

To install from it's version control repo, for the latest unstable release:

pip install git+https://github.com/Kurrawong/labelify

Command Line Usage

Find all missing labels in myOntology.ttl:

labelify myOntology.ttl

Find missing labels for all the predicates (not subjects or objects) in myOntology.ttl:

labelify myOntology.ttl --nodetype predicates

Find all missing labels in myOntology.ttl taking into account the labels which have been defined in another file called supportingVocab.ttl.

but don’t check for missing labels in supportingVocab.ttl

labelify myOntology.ttl --context supportingVocab.ttl

Same as above but use the additional labelling predicates given in myLabellingPredicates.txt.

By default only rdfs:label is used as a labelling predicate.

labelify myOntology.ttl --context supportingVocab.ttl --labels myLabellingPredicates.txt

Where myLabellingPredicates.txt is a list of labelling predicates (one per line and unprefixed):

http://www.w3.org/2004/02/skos/core#prefLabel
http://schema.org/name

Find all the missing labels in the subgraph http://example-graph at the sparql endpoint http://mytriplestore/sparql using basic HTTP auth to connect.

labelify will prompt for the password or it can be provided with the --password flag if you dont mind it being saved to the shell history.

labelify http://mytriplestore/sparql --graph http://example-graph --username admin

Label Extraction

Get all the IRIs with missing labels from a local RDF file and put them into a text file with an IRI per line:

labelify -n all my_file.ttl -r > iris-missing-labels.txt

note use of -r for simple IRI printing

Use the output file to generate an RDF file containing the labes, extracted from either another RDF file, a directory of RDF files or a SPARQL endpoint:

labelify -x iris-missing-labels.txt other-rdf-file.ttl > labels.ttl
# or
labelify -x iris-missing-labels.txt dir-of-rdf-files/ > labels.ttl
# or
labelify -x iris-missing-labels.txt http://some-sparql-endpoint.com/sparql > labels.ttl

Command line output formats

By default, labelify will print helpful progress and configuration messages and attempt to group the missing labels by namespace, making it easier to quickly parse the output.

The --raw/-r option can be appended to any of the examples above to tell labelify to only print the uris of objects with missing labels (one per line) and no other messages. This is useful for command line composition if you wish to pipe the output into another process.

More command line options

For more help and the complete list of command line options just run labelify --help/-h

As per unix conventions all the flags shown above can also be used with short codes. i.e. -g is the same as --graph.

Usage as a module

Print missing labels for all the objects (not subjects or predicates) in myOntology.ttl, taking into account any labels which have been defined in RDF files in the supportingVocabs directory.

Using skos:prefLabel and rdfs:label, but not dcterms:title and schema:name (as per default) as the labelling predicates.

from labelify import find_missing_labels
from rdflib import Graph
from rdflib.namespace import RDFS, SKOS
import glob

graph = Graph().parse("myOntology.ttl")
context_graph = Graph()
for context_file in glob.glob("supportingVocabs/*.ttl"):
    context_graph.parse(context_file)
labelling_predicates = [SKOS.prefLabel, RDFS.label]
nodetype = "objects"

missing_labels = find_missing_labels(
    graph,
    context_graph,
    labelling_predicates,
    nodetype
)
print(missing_labels)

and, to extract labels, descriptions & seeAlso details for given IRIs from a given directory of RDF files:

from pathlib import Path
from labelify import extract_labels

iris = Path("tests/get_iris/iris.txt").read_text().splitlines()
lbls_graph = extract_labels(Path("tests/one/background/"), iris)

Development

Installing from source

Clone the repository and install the dependencies

labelify uses Poetry to manage its dependencies.

git clone [email protected]:Kurrawong/labelify.git
cd labelify
poetry install

You can then use labelify from the command line

poetry shell
python labelify/ ...

Running tests

poetry run pytest

Formatting the codebase

poetry run black . && poetry run ruff check --fix labelify/

License

BSD-3-Clause, if anyone is asking.

Contact

KurrawongAI
[email protected]
https://kurrawong.ai