Input-Formats.md

Input Formats

Grandlite supports a growing variety of input formats. If your graph is in any of the formats below, it can be loaded directly using Grandlite (and converted to any other supported format if you so choose).

GraphML / GML / GPickle

Files can be read directly.

Under the hood, uses networkx.read_graphml etc.

CSV

CSV edgelists can be read either with the assumption that the first two columns are source and target (and all remaining columns, if any, are edge attributes), or a header row can be specified.

Without Header

With no header, the following URI formats for import can be used:

$ grandlite my-example-graph.csv

$ grandlite my-example-graph.edgelist

$ grandlite 'edgelist://my-example-graph.anyextension'

CSV Edgelists with a Header Row

To read edgelist files with a header-row, you can specify the columns that correspond to source and target nodes. For example, in the following edgelist file,

MySource,MyTarget,Weight
1,2,0.5
2,3,0.7

you can specify the column names as follows:

$ grandlite 'h-edgelist(MySource:MyTarget):///path/to/my-example-graph.csv'

OpenCypher

Vertex/Edge files in the OpenCypher import format can be read using the vertex: and edge: prefixes.

$ grandlite 'vertex:vertices.csv;edge:edges.csv'