.. include:: vars.rst

Introduction
************

*RTI® DDS Spy* (*rtiddsspy*) is invaluable when debugging thorny problems with
DDS applications. It is a command-line tool that receives all DDS communication.
*rtiddsspy*:

* Enables inspection of data that applications are publishing, on any DDS domain.
* Can subscribe to select DDS *Topics* and display data samples it
  receives to the terminal. 

*rtiddsspy* enables you to further narrow down the problem space
by filtering data by *Topic*, setting Quality of Service (QoS) profiles, and
monitoring specific Data-Distribution Service™ (DDS) domains, along with many
other options.