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.

Improve the post processor's list of block elements. table, entry and varlistentry are treated as blocks. replaceable is treated as an inline element.
Check that [section] and [endsect] tags are balanced in templates.
Add unicode escape characters, eg. \u03B1 for α.
Support UTF-8 files with a unicode byte order mark.
Disallow [ in simple markup. Fixes some errors with mismatched punctuation.
Add command line flag to define macros at the command line, e.g. quickbook "-D__italic_foo__=/foo/".

Use the cygwin 1.7 API for better path handling.
Improved boostbook generation:
- XML encode the documentation info correctly.
- Avoid generating empty paragraphs.
- No longer wraps block templates in paragraphs.
- Warns if you use invalid doc_info members for docbook document types.
- Fixes some other causes of invalid boostbook, although it still generates invalid boostbook in places.
Improved grammar:
- Supports multiple categories in library doc_info.
- No longer requires commas between authors in docinfo.
- Allows empty document bodies.
- A line containing only a comment is no longer interpreted as a paragraph break.
- If a line starts with a comment, interpret it as a paragraph even if it's followed by whitespace or a list character.
- Doesn't treat several consecutive blank lines as multiple paragraph breaks.
Fixes duplicate image attribute detection.
Fixes using code snippets more than once.
Early work on quickbook 1.6, available using the [quickbook 1.6] version switch, but liable to change in future versions.
- When automatically generating ids for headers, use the quickbook source, rather than the generated docbook.
- Fix id generation in included files. It wasn't correctly using the main document's documentation id.
- Correctly restore the quickbook version switch after including a file with a different version.