Quoting “D-Bus integration in Emacs” 1, D-Bus is defined as followed D-Bus is an inter-process communication mechanism for applications residing on the same host. The communication is based on messages. Data in the messages is carried in a structured way, it is not just a byte stream. According to 1, name of client application is “a series of identifiers separated by dots”, but an application can install multiple objects under its name which are represents as path like syntax – separated by /.