#+TITLE: Ontology Visualization
::see also: Observations
- Example
./ontology_viz.py -o test.dot test.ttl -O ontology.ttl
dot -Tpng -o test.png test.dot
-
Use
-oto indicate the path of output file -
Use
-Oto indicate the input ontology (Optional). -
Use
-Cto 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 is0.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 aClass, 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 nodesclass,literal,instancecan accept HEX value(e.g."#ff0000"), MATLAB style(e.g."r"), and color name (e.g."red").
"colors": { "class": "#ff0000", "literal": "r", "instance": "red", }
instancecan also accept a dict value to specify the color of each class instance. And use"default"to to set color for undefined instances.
"instance": { "https://tac.nist.gov/tracks/SM-KBP/2018/ontologies/SeedlingOntology#Facility": "#a6cee3", "default": "#ffff99" }
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
-Kto specify which [[https://graphviz.gitlab.io/_pages/pdf/dot.1.pdf][layout algorithm]] to use. E.g.-Kneatoand-Ksfdp. Notice that inorder to usesfdplayout algorithm, you will need to build your graphviz with [[http://gts.sourceforge.net][GTS]].-Tto specify the [[https://graphviz.gitlab.io/_pages/doc/info/output.html][output format]].-Gto 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]].