@subheading Goals

The @file{trunk/Identity/Themes/} directory exists to organize
production of CentOS themes.

@subheading Description

Initially, we start working themes on their trunk development line
(e.g., @file{trunk/Identity/Themes/Motifs/TreeFlower/}), here we
organize information that cannot be produced automatically (i.e.,
background images, concepts, color information, screenshots, etc.).

Later, when theme trunk development line is considered ``ready'' for
implementation (e.g.,  all required backgrounds have been designed),
we create a branch for it (e.g.,
@file{branches/Identity/Themes/Motifs/TreeFlower/1/}).  Once the
branch has been created, we forget that branch and continue working
the trunk development line while others (e.g., an artwork quality
assurance team) test the new branch for tunning it up. 

Once the branch has been tunned up, and considered ``ready'' for
release, it is freezed under @file{tags/} directory (e.g.,
@file{tags/Identity/Themes/Motifs/TreeFower/1.0/}) for packagers,
webmasters, promoters, and anyone who needs images from that CentOS
theme the tag was created for.

Both branches and tags, inside CentOS Artwork Repository, use
numerical values to identify themselves under the same location.
Branches start at one (i.e., @samp{1}) and increment one unit for each
branch created from the same trunk development line.  Tags start at
zero (i.e., @samp{0}) and increment one unit for each tag created from
the same branch development line.

@quotation
@strong{Convenction} Do not freeze trunk development lines using tags
directly.  If you think you need to freeze a trunk development line,
create a branch for it and then freeze that branch instead.
@end quotation

The trunk development line may introduce problems we cannot see
immediatly. Certainly, the high changable nature of trunk development
line complicates finding and fixing such problems. On the other hand,
the branched development lines provide a more predictable area where
only fixes/corrections to current content are commited up to
repository. 

If others find and fix bugs inside the branched development line, we
could merge such changes/experiences back to trunk development line
(not visversa) in order for future branches, created from trunk, to
benefit.

Time intervals used to create branches and tags may vary, just as
different needs may arrive. For example, consider the release schema
of CentOS distribution: one major release every 2 years, security
updates every 6 months, support for 7 years long. Each time a CentOS
distribution is released, specially if it is a major release, there is
a theme need in order to cover CentOS distribution artwork
requirements. At this point, is where CentOS Artwork Repository comes
up to scene. 

Before releasing a new major release of CentOS distribution we create
a branch for one of several theme development lines available inside
the CentOS Artwork Repository, perform quality assurance on it, and
later, freeze that branch using tags. Once a the theme branch has been
frozen (under @file{tags/} directory), CentOS Packagers (the persons
whom build CentOS distribution) can use that frozen branch as source
location to fulfill CentOS distribution artwork needs. The same
applies to CentOS Webmasters (the persons whom build CentOS websites),
and any other visual manifestation required by the project.

@subheading Usage

In this location themes are organized in ``Models'' ---to store common
information--- and ``Motifs''---to store unique information.  At
rendering time, both motifs and models are combined to produce the
final CentOS themes.  CentOS themes can be tagged as ``Default'' or
``Alternative''. CentOS themes are maintained by CentOS community. 

@itemize
@item @xref{Directories trunk Identity Themes Models}.
@item @xref{Directories trunk Identity Themes Motifs}.
@end itemize

@subheading See also

@itemize
@item @ref{Directories trunk Identity}.
@item @ref{Directories trunk}.
@end itemize