The BRIDG project uses Sparx Systems’ modeling tool called Enterprise Architect. We maintain the file as an .EAP, therefore you will need the Enterprise Architect modeling tool from Sparx Systems** to view the contents. When we publish a BRIDG release, we provide both the .EAP file as well as an XMI output. The XMI output allows users to import the BRIDG model into other UML modeling tools, besides Enterprise Architect.
** Sparx Systems provides a "FREE" Viewer version of the Enterprise Architect software -- "Enterprise Architect Viewer".