不同的图形编辑工具编辑的图形是否可以互通？GraphML、GXL、GML、XGMML和SVG是目前重要的几种技术。
GraphML - a comprehensive and easy-to-use file format for graphs. It consists of a language core to describe the structural properties of a graph and a flexible extension mechanism to add application-specific data.
GXL - an XML-based graph exchange format developed for software re-engineering.基于XML的图形交换格式，用于软件工程。
GML - a widely used graph exchange format (non-XML).广泛使用的图形交换格式（非XML）。
XGMML - an XML-based file format for graphs based on GML.在GML的基础上，基于XML的文件格式。
SVG - an XML-based graphics format. 基于XML的图形格式。 | 
