[/==============================================================================
    Copyright (C) 2001-2010 Joel de Guzman
    Copyright (C) 2001-2010 Hartmut Kaiser

    Distributed under the Boost Software License, Version 1.0. (See accompanying
    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
===============================================================================/]

[section Preface]

[heading The Spirit Repository]

The __spirit__ repository is a community effort collecting different reusable
components (primitives, directives, grammars, etc.) for __qi__ parsers and 
__karma__ generators. All components in the repository have been peer reviewed 
and/or discussed on the __spirit_list__. The aim is to broaden the scope of the 
__spirit__ library while being able to maintain its high standards in terms of 
code quality, flexibility, and maintainability. At the same time it encourages 
people to contribute even small components as it lessens the hurdle of becoming 
a __boost__ and __spirit__ author. 

Maintainability of the code and author commitment over a longer period of time 
are crucial for /Spirit's/ success (as it is for the whole __boost__ project). 
That allows the repository to play an additional role in terms of being a 
proving ground for interested authors. It is a lot easier to remove code from 
the repository than from the /Spirit/ core library. So if an author can't 
maintain his/her contribution anymore for any reason, we are able to remove 
those parts from the repository more easily.

The repository is an excellent way of evolving things. The /Spirit/ core has 
been developed for years, so we have a certain confidence of it being properly 
designed and exposing a proven API. On the other hand, new ideas often need 
some time to 'come to the point'. Changing API's is part of this business. At 
the same time changing API's always mean user disruption, which we want to keep 
to a minimum. Again, changing things in the repository is ought to be a lot 
easier than in the core library.

The quality of contributions is another key to success. That includes not only 
the code itself, but takes into consideration such things as documentation, 
tests, examples. The authors activity on the mailing list is related as well, 
it's an important point. Only well supported things will evolve over time into 
usable, high quality components. The mandatory discussions and the review of 
contributions on the __spirit_list__ ensure the targeted high quality 
standards.

Based on the user feedback and general usability of things it it possible over 
time to move repository components/grammars into the /Spirit/ core library.

[heading How to use this manual]

Some icons are used to mark certain topics indicative of their relevance.
These icons precede some text to indicate:

[table Icons

    [[Icon]             [Name]          [Meaning]]

    [[__note__]         [Note]          [Generally useful information (an aside that
                                        doesn't fit in the flow of the text)]]

    [[__tip__]          [Tip]           [Suggestion on how to do something
                                        (especially something that not be obvious)]]

    [[__important__]    [Important]     [Important note on something to take
                                        particular notice of]]

    [[__caution__]      [Caution]       [Take special care with this - it may
                                        not be what you expect and may cause bad
                                        results]]

    [[__danger__]       [Danger]        [This is likely to cause serious
                                        trouble if ignored]]
]

This documentation is automatically generated by Boost QuickBook documentation
tool. QuickBook can be found in the __boost_tools__.

[heading Support]

Please direct all questions to Spirit's mailing list. You can subscribe to the
__spirit_list__. The mailing list has a searchable archive. A search link to
this archive is provided in __spirit__'s home page. You may also read and post
messages to the mailing list through __spirit_general__ (thanks to __gmane__).
The news group mirrors the mailing list. Here is a link to the archives:
__mlist_archive__.

[endsect] [/ Preface]