Linked Data or JSON-LD Visualization Tools

[Terry Brady]

Years ago, I used a tool called Ontopia to visualize the contents of a topic map file.  I was able to build up a list of statement triples, load it into a server, and then navigate through the graph of relationships.

Today, I have a similar need to  model a graph of related items (people, places, events).  My hope is that I could use RDF or JSON-LD to capture these relationships and to allow new types of relationships to be added to the graph.

I have been exploring the visualization that is created in the JSON-LD Playground: https://json-ld.org/playground/ and this has some features that are useful.

This tool creates a useful diagram if I keep the number of entities in my diagram fairly small (under 25).  I have encountered 2 challenges

• The visualization becomes unusable after about 50 entities have been added.
• If I reference an entity defined elsewhere in the graph, that reference does not link to the definition of the entity.

I have a couple questions

• Is there a more robust tool for visualizing relationships found in JSON-LD (or RDF)?
• Are you aware of a good tool for validating a JSON-LD (or RDF) file?
• Would you have any other suggestions?

Thanks,

Terry