The native file format of WebGraph.
It is a binary format and highly storage efficient.
It is for example what Common Crawl web graph currently dumps to as of 2025, see e.g.: data.commoncrawl.org/projects/hyperlinkgraph/cc-main-2024-25-dec-jan-feb/index.html
TODO meaning of "BV"?
A quick hands-on introduction to the format by Ciro Santilli can be found at: stackoverflow.com/questions/31321009/best-more-standard-graph-representation-file-format-graphson-gexf-graphml/79467334#79467334
New to topics? Read the docs here!