The Ontology Graph Editor is a powerful tool that allows users to directly edit an ontology graph from an intuitive user interface.

Visualize the graph at different granularity

The Ontology Graph Editor can be accessed whenever the icon in the figure below is present, by simply clicking on it.

The Ontologies graph can be visualized at different granularity:

• Complete View: To view the graph of all the ontologies defined in Blindata, click on the Ontology Graph Editor button that is visible in the Namespaces or in the Concepts list pages.
• Namespace: To view the graph of a single namespace, click on the Ontology Graph Editor button that is visible in the namespace detail page.
• Concept: To visualize the graph of a single concept and its related concepts, click on the Ontology Graph Editor button that is visible in the concept detail page, under the attributes section.

Add a Concept

Right-clicking on an empty area of the view allows you to add a new concept.

Add an Attribute to a Concept

Right-clicking on a node concept allows to execute actions on that concept.

• View Summary: View the detail of the concept, with its attributes.
• Add Attribute: Associate an attribute to that concept.

Handle Relations between Concepts

To add a relation between two concept, right-click on the relation’s starting concept and select add relationship. Then connect the two concept using the editor linking feature.

Select a Graph Layout

Choose the preferred graph layout by clicking the buttons at the bottom left of the screen. Two layout options are available:

• Dagre Layout: This layout is optimal for smaller graphs, presenting a clear, hierarchical structure that arranges concepts and their relationships in an organized, top-down view. It’s especially useful for focused analyses or when working with a reduced set of concepts.

• Force Layout: Designed for larger, more complex graphs, this layout dynamically arranges nodes based on their connections, allowing related concepts to cluster naturally. This layout provides a more expansive view, making it easier to see broader relationships across many concepts.

The system will automatically choose a layout based on the number of concepts, but you can manually adjust it if preferred.