GraphBLAS
API for graph data and graph operations
GraphBLAS Specification
xxv-xxvi
Graph algorithms
"In most cases, the 0 element is standard arithmetic 0, but in other cases it can be a different value. Nonstandard 0 values can be helpful when combined with different ⊕ and ⊗ operations."
The logo of the GraphBLAS API
Preface
Released
"VII. 0-Element: No Graph Edge"