Linked Data Fragments jQuery Widget
This jQuery widget is a browser-based user interface to the Linked Data Fragments client.
It allows users to execute SPARQL queries over one or multiple datasets exposed through a Triple Pattern Fragments interface.
Using the code
npm installto fetch dependencies and build the browser version of the client code.
npm startto run a local Web server.
- Edit datasources in
settings.jsonand queries in the
queriesfolder, and run
queries-to-jsonto compile both of them in a single JSON file.
npm run productionto generate a production version in the
How the browser client works
The original ldf-client library is written for the Node.js environment.
The browserify library makes it compatible with browsers.
The query engine itself runs in a background thread
using Web Workers.
The user interface (
instructs the worker (
ldf-client-worker.js) to evaluate queries
by sending messages,
and the worker sends results back.
(Optional) Running in a Docker container
If you want to rapidly deploy this widget as a microservice, you can build a Docker container as follows:
$ docker build -t ldf-client-widget .
Next, configure your widget by creating a
settings.json file in your working directory based on the example.
Next, create a
queries directory in which you should insert the queries that will be present by default in the widget, as is done here.
After that, you can run your newly created container by mounting your current folder to the Docker container:
$ docker run -p 3000:3000 -it --rm -v $(pwd)/:/tmp/ ldf-client-widget
The Linked Data Fragments jQuery Widget is written by Ruben Verborgh.