Change Log

Quickbook file inclusion [include].
Better xml output (pretty layout). Check out the generated XML.
Regression testing facility: to make sure your document will always be compatible (full backward compatibility) regardless of changes to QuickBook.
Code cleanup and refactoring.
Allow phrase markup in the doc-info.
Preformatted code blocks via ``code`` (double ticks) allows code in tables and lists, for example.
Quickbook versioning; allows full backward compatibility. You have to add [quickbook 1.3] to the doc-info header to enable the new features. Without this, QuickBook will assume that the document is a pre-1.3 document.
Better (intuitive) paragraph termination. Some markups may terminate a paragraph. Example:
```
[section x]
blah...
[endsect]
```
Fully qualified section and headers. Subsection names are concatenated to the ID to avoid clashing. Example: doc_name.sect_name.sub_sect_name.sub_sub_sect_name
Better   and whitespace handling in code snippets.
[xinclude] fixes up the relative path to the target XML file when input_directory is not the same as the output_directory.
Allow untitled tables.
Allow phrase markups in section titles.
Allow escaping back to QuickBook from code, code blocks and inline code.
Footnotes, with the [footnote This is the footnote] syntax.
Post-processor bug fix for escaped XML code that it does not recognize.
Replaceable, with the [~replacement] syntax.

Generic Headers
Code changes to allow full recursion (i.e. Collectors and push/pop functions)
Various code cleanup/maintenance
Templates!
[conceptref] for referencing BoostBook <concept> entities.
Allow escape of spaces. The escaped space is removed from the output. Syntax: \ .
Nested comments are now allowed.
Quickbook blocks can nest inside comments.
Import facility.
Callouts on imported code
Simple markups can now span a whole block.
Blurbs, Admonitions and table cells (see Tables) may now contain paragraphs.
\n and [br] are now deprecated.
Conditional Generation. Ala C++ #ifdef.
Searching of included and imported files in an extensible search path with --include-path (-I) option.

Boost C++ Libraries