Graph-Graph6

Graph::Graph6 reads and writes graph6, sparse6 and digraph6 format files in Perl. They can be read and written

• Natively as integer vertices and edge array or callbacks.
• Graph.pm (with Graph::ReadWrite)
• Graph::Easy
• GraphViz2 (read only)

Graph-Graph6 is free software (free as in freedom), published under the terms of the GNU General Public License (v3 or higher).

Download version 9 here, either the full source here or from CPAN, or a Debian package here or from my repo.

Graph-Graph6-9.tar.gz (111k, and sig)
libgraph-graph6-perl_9-0.1_all.deb (46k, and sig)

The sig files are Gnu PG ascii armoured signatures generated from my key. There's a SIGNATURE file inside the .tar.gz for cpansign too. Older sources can be found at backpan.

These formats are used variously by

• Nauty tools (also here) for input and output
• House of Graphs for searches, uploads, and among its downloads