src/main/java/org/apache/maven/doxia/book/services/renderer/DocbookBookRenderer.java (2 lines):
	- line 95: // TODO: Write out TOC?
	- line 103: // TODO: symmetrize bookHead?


src/main/java/org/apache/maven/doxia/book/services/renderer/AbstractITextBookRenderer.java (1 line):
	- line 133: // TODO: Write out TOC


src/main/java/org/apache/maven/doxia/book/services/validation/DefaultBookValidator.java (1 line):
	- line 68: // TODO: Validate the chapter id