Web application
Knowledge Graph Editor
Draw a knowledge graph. Add classes, individuals, multilingual attributes and labelled relationships.
The application opens in a new tab.
Tool guide
Work with KGE
On this page
KGE is for drawing and editing a graph directly on a browser canvas. It distinguishes classes from individuals and supports typed attributes, search and filtering.
Quick start
- Add a node: enter a name and choose Class or Individual.
- Select it and add string or number attributes.
- Choose source, target and label in Add Relation.
- Arrange the canvas, then export your graph.
The interface
The left sidebar contains editing tools. The central canvas shows the graph. The right sidebar shows selected elements, statistics and searchable lists. Toggle Panels frees canvas space; Freeze stops the layout moving.
Nodes
Create a class for a concept or an individual for a specific instance. Rename or change the type in Edit Node. Dragging changes the layout, not the meaning. The All Nodes filter fades non-matching nodes.
Attributes
String attributes can carry a language tag; number attributes represent numeric values. Use the language selector for multilingual labels.
Relations
A labelled arrow connects source and target. Select a relation to edit its label or remove it. Search in All Relations by relationship label or endpoint name.
Explore the canvas
Use zoom, hover highlights and the node/relation lists together. Graph Stats reports nodes and relations. Colours supplement the explicit Class and Individual types.
Import & export
Use JSON to continue editing in KGE, preserving its layout and editor-specific data. Use RDF/XML for exchange with semantic tools. Choose the matching format when importing. Export before closing or reloading the tab.
Troubleshooting
Blank canvas: use a current browser with canvas support. Failed import: check RDF/XML or KGE JSON, not Turtle or JSON-LD. Lost work: reload the last exported file; the documentation does not promise automatic saving.
Tool information
- Developer
- Christophe Roche
- Documented version
- 1.2
- Application
- Web application
- Formats
- RDF/XML · JSON
Licence & citation
The supplied tool documentation specifies PolyForm Noncommercial 1.0.0. It permits use, modification and sharing for permitted non-commercial purposes, with the required licence and notices retained. It is source-available, with a non-commercial restriction. Check the licence included with the version you use.
Citation
Roche, C. (2025). KGE (1.2). TALOS AI4SSH Laboratory, University of Crete. https://tools.talos-lab.eu/KGE/Developed within TALOS AI4SSH, University of Crete, Horizon Europe grant agreement 101087269.
Visual sources
Logos and interface images are existing TALOS/tool-author assets, reused for this documentation. The screenshots show the documented interface; live versions may differ.