DOT
(Mathematica Import/Export Format) DOT graph language and data format. Commonly used exchange format for graphs. Stores a single attributed, directed, or undirected graph. Can contain user-defined graph, edge, ...
Graphlet
(Mathematica Import/Export Format) Graphlet GML graph data format. Used for the storage and exchange of graphs. GML is an acronym derived from Graph Modelling Language. Native format of the Graphlet graph ...
AdjacencyMatrix[g] gives the vertex\[Dash]vertex adjacency matrix of the graph g.
TGF
(Mathematica Import/Export Format) TGF graph data format. Used for the storage and exchange of graphs. TGF is an acronym for Trivial Graph Format. Stores directed graphs. Stores at most one label per vertex ...
RemoveProperty[{obj, item}] removes all properties associated with item in obj.RemoveProperty[{obj, item}, name] removes the property name associated with item in obj.
EdgeQ
(Built-in Mathematica Symbol) EdgeQ[g, e] yields True if e is an edge in the graph g and False otherwise.
SetProperty[{obj, item}, name -> value] sets the property name -> value for item in obj.