Graph Modeling Language (GML) is a hierarchical ASCII-based file format for describing graphs. It has been also named Graph Meta Language.
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Example
A simple graph in GML format:
graph [ comment "This is a sample graph" directed 1 id 42 label "Hello, I am a graph" node [ id 1 label "node 1" thisIsASampleAttribute 42 ] node [ id 2 label "node 2" thisIsASampleAttribute 43 ] node [ id 3 label "node 3" thisIsASampleAttribute 44 ] edge [ source 1 target 2 label "Edge from node 1 to node 2" ] edge [ source 2 target 3 label "Edge from node 2 to node 3" ] edge [ source 3 target 1 label "Edge from node 3 to node 1" ] ]Applications supporting GML
- Cytoscape, an open source bioinformatics software platform for visualizing molecular interaction networks, loads and save previously-constructed interaction networks in GML.
- igraph, an open source network analysis library with interfaces to multiple programming languages.
- Gephi, an open source graph visualization and manipulation software.
- Graph-tool, a free Python module for manipulation and statistical analysis of graphs.
- NetworkX, an open source Python library for studying complex graphs.
- Tulip (software) is a free software in the domain of information visualisation capable of manipulating huge graphs (with more than 1.000.000 elements).
- yEd, a free Java-based graph editor, supports import from and export to GML.
- The Graphviz project includes two command-line tools (gml2gv and gv2gml) that can convert to and from the DOT file format.
- Wolfram Language, a general very high-level programming language, supports GML import and export.
See also
- Graph Query Language (GQL)
- DGML
External links
- GML: A portable Graph File Format, Michael Himsolt - 2010/11/30 (archived version)
- Unravelling Graph-Exchange File Formats, by Matthew Roughan and Jonathan Tuke, 2015, https://arxiv.org/pdf/1503.02781.pdf
References
Plenz, M., Frank, A., Graph Language Models, 2401.07105, cs.CL, 2024, https://arxiv.org/abs/2401.07105, access date: 2025-07-03 https://arxiv.org/abs/2401.07105 ↩