https://github.com/usc-isi-i2/ontology-visualization

A simple ontology and RDF visualization tool.
https://github.com/usc-isi-i2/ontology-visualization

ontology ontology-visualization rdf semantic triples visualization

Last synced: 2 months ago
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A simple ontology and RDF visualization tool.

• Host: GitHub
• URL: https://github.com/usc-isi-i2/ontology-visualization
• Owner: usc-isi-i2
• License: mit
• Created: 2018-08-09T20:11:54.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2022-09-20T13:39:05.000Z (about 3 years ago)
• Last Synced: 2025-02-18T11:58:44.175Z (8 months ago)
• Topics: ontology, ontology-visualization, rdf, semantic, triples, visualization
• Language: Python
• Homepage:
• Size: 27.3 KB
• Stars: 130
• Watchers: 6
• Forks: 46
• Open Issues: 15
• Metadata Files:
  • Readme: README.org
  • License: LICENSE

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README

          
#+TITLE: Ontology Visualization

* Example

#+BEGIN_SRC bash

  ./ontology_viz.py -o test.dot test.ttl -O ontology.ttl

  dot -Tpng -o test.png test.dot

#+END_SRC

- Use ~-o~ to indicate the path of output file

- Use ~-O~ to indicate the input ontology (Optional).

- Use ~-C~ to indicate the configuration file (Optional).

  - ~max_label_length~: config the max length of labels. If the text exceeds the length, exceeded part will be replaced with "...". Default value is ~0~.

  - ~blacklist~: config the predicate that you don't want to see in the graph.

  - ~class_inference_in_object~: config the predicate that can inference the object is a ~Class~, even if the class doesn't defined in the ontology.

  - ~label_property~: config the predicate that used for labeling nodes, if such a label exists, it will display inside the node.

  - ~tooltip_property~: config the predicate that contains the tooltip texts.

  - ~bnode_regex~: a list of regexes, if an uri matches, then it will be dispaly as a blank node without its uri nor label. It can be useful if you have a lot of reifications.

  - ~colors~: config the colors of nodes

    - ~class~, ~literal~, ~instance~ can accept HEX value(e.g. ~"#ff0000"~ ), MATLAB style(e.g. ~"r"~ ), and color name (e.g. ~"red"~ ).

    #+BEGIN_SRC json

      "colors": {

        "class": "#ff0000",

        "literal": "r",

        "instance": "red",

      }

    #+END_SRC

    - ~instance~ can also accept a dict value to specify the color of each class instance. And use ~"default"~ to to set color for undefined instances.

    #+BEGIN_SRC json

      "instance": {

        "https://tac.nist.gov/tracks/SM-KBP/2018/ontologies/SeedlingOntology#Facility": "#a6cee3",

        "default": "#ffff99"

      }

    #+END_SRC

    - ~filled~: config whether fill the node, default value: ~true~.

- Classes defined in the ontology will be omitted in the output graph. This action can be switched with argument ~-V~.

** Useful Graphviz flags

- ~-K~ to specify which [[https://graphviz.gitlab.io/_pages/pdf/dot.1.pdf][layout algorithm]] to use. E.g. ~-Kneato~ and ~-Ksfdp~ . Notice that inorder to use ~sfdp~ layout algorithm, you will need to build your graphviz with [[http://gts.sourceforge.net][GTS]].

- ~-T~ to specify the [[https://graphviz.gitlab.io/_pages/doc/info/output.html][output format]].

- ~-G~ to set a [[https://graphviz.gitlab.io/_pages/doc/info/attrs.html][graph attribute]]. E.g. ~-Goverlap=prism~

* Requirements

In order to use this tool, you'll need to make sure you have [[https://github.com/RDFLib/rdflib][rdflib]] installed.

In order to convert =dot= into =png= or =svg= image, you will need [[https://www.graphviz.org][Graphviz]].