Here is a list of all topics with brief descriptions:

Complete API of createrepo_c library
Library version information.
API for checksum calculation.
Wrapper for compressed file.
Global constants and enums.
Constants
Createrepo API.
Support for deltarpms
Implementation of concurent dumping used in createrepo_c
Helpers for createrepo_c, modifyrepo_c, mergerepo_c
Load metadata API.
Locate metadata API.
Miscellaneous useful functions and macros.
Modifyrepo API.
Package representation.
Header parser API.
Package parser API.
Repomd API.
SQLite metadata API.
Useful thread function to use in GThreadPool.
Updateinfo API.
XML dump API.
XML file API.
XML parser API.