Here is a list of all documented files with brief descriptions:

include
core
frame.h	Single frame of core stack trace thread
stacktrace.h	A stack trace of a core dump
thread.h	Single thread of execution of a core stack trace
unwind.h	Core unwind
gdb
frame.h	Single frame of GDB stack trace thread
sharedlib.h	Shared library information as produced by GDB
stacktrace.h	Stack trace as produced by GDB
thread.h	Single thread of execution of GDB stack trace
java
frame.h	Java frame structure and related algorithms
stacktrace.h	Java stack trace structure and related algorithms
thread.h	Single thread of execution of JAVA stack trace
js
frame.h	JavaScript frame structure and related routines
platform.h	Platform JavaScript platform
stacktrace.h	JavaScript stack trace
koops
frame.h	Kernel oops stack frame
stacktrace.h	Kernel oops stack trace structure and related algorithms
python
frame.h	Python frame structure and related algorithms
stacktrace.h	Python stack trace structure and related algorithms
ruby
frame.h	Ruby frame structure and related routines
stacktrace.h	Ruby stack trace
abrt.h	Abrt
deb.h	Deb-related structures and utilities
distance.h	Distance between stack trace threads
frame.h	Frame
location.h	Parser location in input file
normalize.h	Normalization of stack traces
operating_system.h	Operating system
report.h	Report
report_type.h	Report type
rpm.h	RPM-related structures and utilities
stacktrace.h	Stack trace
thread.h	Thread
utils.h	Various utility functions, macros and variables that do not fit elsewhere