Introduction

The RDF to SVG service RDF2SVG generates a SVG graphical representation of the input RDF following the workflow:

RDF -rules-> Graph Visualization RDF Model -xslt-> .DOT File -Graphviz-> SVG

The input RDF goes through a set of Jena rules that select the parts of the RDF structure to show and models them also using RDF. Currently there is 1 set of rules that:

• Represents the whole graph structure generated by RDF triples.

Future work is to make available additional rules that:

• Represent just the hierarchical structure of the classes defined in the input RDF.
• Represent the hierarchy of parts in the input RDF.
• Represent the OWL constructs in the input RDF defining an ontology.

As a result of the reasoning based on the selected set of rules, an output RDF modelling the graph structure to visualize is generated. This RDF is then processed by an XSL transformation that models the same structure using the Graphviz .DOT format.

The .DOT file is then sent to Graphviz, which layouts the graph visualization and renders it as an SVG, the final output of the RDF to SVG web service.

Deployment

To deploy the ReDeFer RDF2SVG Docker image and make the RDF to SVG service available from port 8080:

docker run -p 8080:8080 rhizomik/redefer-rdf2svg

Alternatively, you can also use docker-compose and the following docker-compose.yml:

version: '3'
services:
  redefer-rdf2svg:
    image: rhizomik/redefer-rdf2svg
    container_name: redefer-rdf2svg
    ports:
      - "8080:8080"
    environment:
      - NET_RHIZOMIK_REDEFER_RDF2SVG_DOTPATH=/usr/bin/dot
      - JAVA_OPTS=-Xmx512m -Xms128m