This is a text file explaining the Census of all connected arc-transitive digraphs of out-valence and in-valence 2 on at most 1.000 vertices.
It turns out that there are 26457 such digraphs.
More information on how the census was obtained and about the meaning of the parameters in the csv files can be found in the paper:

P. Potocnik, P. Spiga, G. Verret, "A census of 4-valent half-arc-transitive graphs and arc-transitive digraphs of valence two", Ars Mathematica Contemporanea, special issue for 60th birthday of Dragan Marušič vol. 8 (2015)

If you use the census for academic purposes, you should acknowledge its use by citing this paper. If you use the census for commercial purposes, contact one of the authors by email. Any unauthorised use of the census for commercial purposes without prior consent of the authors is prohibited.

