SPARQL Endpoints and Web API (SWApi)

Half-Day Tutorial at ICWE 2022

Tutorial Structure

This half-day tutorial will be decomposed into two parts, consisting each of slides and hands-on exercises: The first part will focus on data reshaping and merging. After summarising the main issues related to RDF data consumption by developers, we will introduce different solutions coming from the literature, such as RDFJS, LDflex, GraphQL-based strategies and others. We will then explain the fundamentals of SPARQL Transformer and present in-depth details about its querying and templating features, its parsing capabilities, and its merging strategy, giving to the audience a complete picture of the library. Example of usage in JavaScript and Python will be shown. Some hands-on exercises will be proposed in order to make the public play with the application, making use of the SPARQL Transformer playground. The second part will cover the publication of Web API on top of SPARQL endpoints. Different specification – e.g. smartAPI, Linked Data API specification, OpenAPI – and services – e.g. BASIL – for describing RESTful APIs will be introduced to the audience . Then, we will show the grlc application and explain the different part of the framework: the GitHub repository, the self-generated UI and the automatically exposed API. The public will then publish their own API in the second hands-on session. Finally, we will introduce the integration of SPARQL Transformer in grlc and we will conclude the tutorial with a summary of the covered topics.

Time Schedule

All times are in CEST (hour in Bari, Italy).

14:00 Part 1 Libraries for accessing RDF data
  10’ Introduction
  20’ Overview: libraries for accessing RDF data
  30’ SPARQL Transformer
  20’ SPARQL Transformer hands-on
15:30 Break  
16:00 Part 2 Web API for RDF
  20’ Overview: Web API for RDF
  20’ grlc
  20’ grlc hands-on
  10’ SPARQL Transformer and grlc
  10’ Discussion and closing
17:00 End of the tutorial  

Photo credit: Thomas Claveirole