Example

A knowledge graph — shown by example

Theory is good, a picture is better. Here's a tiny knowledge graph from the real Plant-Doctor world — four connected facts that show how knowledge turns into a reliable answer.

By Fabio Fornaro, Domani AI

Example: a tiny knowledge graph for plant diagnosis.

How the AI "thinks" through it

Instead of guessing, the AI walks the path: it starts at the observed symptom, follows the "indicates" edge to the likely disease, and from there via "treated with" to the right treatment. Every step is a stored, verified relationship — not a statistical gut feeling.

What makes it reliable

The AI can only walk paths that actually exist in the graph — no invented shortcuts.
If there's no path, it says "I don't know" instead of inventing something.
Every answer is traceable: "symptom X → disease Y → treatment Z".
New knowledge means adding new nodes and edges — the rest stays stable.

From toy to real solution

This example has four nodes. A real Plant-Doctor graph has many hundreds — plant species, symptoms, causes, location factors, treatments — cleanly connected and curated. The principle stays identical: recognise, follow, recommend, substantiate.

“In a knowledge graph the AI walks a verified path — from symptom via disease to treatment — instead of statistically guessing an answer.”

“A real Plant-Doctor knowledge graph connects hundreds of verified facts — plants, symptoms, causes, treatments — on the same principle as the four-node example.”

More in the knowledge-graph hub

Back to the hub→What is a knowledge graph?→Knowledge Brain — our offer→

Frequently asked

Is a real knowledge graph as simple as this example?

The principle yes, the scale no. Real graphs have many hundreds to thousands of nodes and edges plus extra conditions — but they work on exactly this logic of nodes, edges and verified paths.

Where do the connections in the graph come from?

From curated expert knowledge: expertise, verified sources, rules. That curation is the real work — and the reason the answers are reliable.

Can I get something like this for my field?

If your field has verified knowledge with clear relationships — yes. That's exactly what we build. The best way to start is a bounded 30-day pilot.

A graph like this for your knowledge?

Tell us about your field — we'll show what your own knowledge graph could look like.

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