what is source in requirements traceability matrix code example

Example: what requirements traceability matrix

Requirement Traceability Matrix
(RTM) is a document that maps and 
traces user requirement with test cases. 
It captures all requirements
proposed by the client and requirement 
traceability in a single document,
delivered at the conclusion of 
the Software devlopement life cycle. 
The main purpose of 
Requirement Traceability Matrix is to 
validate that all requirements 
are checked via test cases such that
no functionality is unchecked 
during Software testing.

We use Jira XRAY for the RTM and it
generates XRAY reports to track 
the test cases. It gives me detailed 
report of test cases and requirements.
It gives me how many test execution, 
how many test run, total tests, fails, 
passes