Vocabulary and Aliases

Here is a list of all property keys and defined string values. There are a number of alias values, which an implementation MAY support. See also Migrating from JSON Graph.

Table 1. Properties
Property Name	Is Alias For	Usage in	See
`dir`	`direction`	Endpoint	1
`endpoint`	`endpoints`	Edge	2, 3
`edge`	`edges`	Graph	2
`from`	`source`	Edge	3
`graph`	`graphs`	Document	2
`hyperedges`	`edges`	Graph	4
`node`	`nodes`	Graph	2
`sources`	`source`	Edge	2, 3
`targets`	`target`	Edge	2, 3
`to`	`target`	Edge	3

(1) Alias Ambiguity: The non-alias value has precedence if both property and alias property are used.
(2) Single- and array properties: If both are used, are silently merged at parse-time into a single array.
(3) Endpoints: All endpoint properties generate endpoints of an edge.
(4) Alias for JSON Graph compatibility

Table 2. Values for Endpoint `direction`
Value	Is Aliases For	Usage in
`incoming`	`in`	Endpoint
`none`	`undir`	Endpoint
`outgoing`	`out`	Endpoint
`undirected`	`undir`	Endpoint

Table 3. Graph Properties
Alternative	Parsed as
`directed`: `true`	`edgeDefault`: `directed`
`directed`: `false`	`edgeDefault`: `undirected`

For compatibility with JSON Graph.