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.

Fix command line flag for defining macros.
Fix a couple of issues with the code block parser:
- A comment with no indentation will now end a code block.
- Code blocks no longer have to be followed by a blank line.
Improved tracking of file position in templates and imported code blocks.
Better generated markup for callout lists.
In docbook, variable list entries can only have one listitem, so if an entry has multiple values, merge them into one listitem.
Support nested code snippets.
Support nested blocks in document info comments.
Revert xml escaping document info, it broke some documentation files (now a 1.6 feature).
Further work on quickbook 1.6, still not stable.
- Allow heading to have ids, using the syntax: [heading:id title].
- XML escape documentation fields, with escapes to allow encoding unicode in ASCII.

Boost C++ Libraries