.GEXF File Extension
File TypeGraph Exchange XML Format File
What is a GEXF file?
Graph file written in the GEXF (Graph Exchange XML Format) language, a language used for describing network structures; specifies the nodes and edges of the graph as well as user-defined attributes such as node weights or edge directions; can be used as an interchange format between graphing applications.
NOTE: GEXF files can be read and written using a Java library called gexf4j.