JGF (JSON Graph Format) is a JSON-based file format for storing one or more graphs.

It also allows the application of labels to vertices and edges.

The format supports directed and undirected graphs, and permits the association of arbitrary metadata with vertices and edges.

The GraphTheory[ImportGraph] and GraphTheory[ExportGraph] commands can read from and write to this format.

The general-purpose commands Import and Export also support this format.

$\mathrm{Mammals}≔\mathrm{Import}\left(''example/mammals.jgf''\,\mathrm{base}=\mathrm{datadir}\right)$

$\mathrm{Mammals}≔\mathrm{Graph\; 1:\; a\; directed\; unweighted\; graph\; with\; 18\; vertices\; and\; 17\; arc(s)}$

$\mathrm{GraphTheory}:-\mathrm{DrawGraph}\left(\mathrm{Mammals}\,\mathrm{style}=\mathrm{spring}\right)$

$\mathrm{CG}≔\mathrm{GraphTheory}:-\mathrm{SpecialGraphs}:-\mathrm{ClebschGraph}\left(\right)$

$\mathrm{CG}≔\mathrm{Graph\; 2:\; an\; undirected\; unweighted\; graph\; with\; 16\; vertices\; and\; 40\; edge(s)}$

$\mathrm{Export}\left(''clebsch.jgf''\,\mathrm{CG}\,\mathrm{base}=\mathrm{homedir}\right)$

$2516$

JSON Graph Format Specification, http://jsongraphformat.info/.