Fossil

<li> [#attachment | Attachments] </li>
<li> [#event | Events] </li>
</ul>

These seven artifact types are described in the following sections.

In the current implementation (as of 2009-01-25) the artifacts that
make up a fossil repository are stored in in as delta- and zlib-compressed
blobs in an <a href="http://www.sqlite.org/">SQLite</a> database.  This
is an implementation detail and might change in a future release.  For
the purpose of this article "file format" means the format of the artifacts,
not how the artifacts are stored on disk.  It is the artifact format that
is intended to be enduring.  The specifics of how artifacts are stored on
disk, though stable, is not intended to live as long as the
artifact format.

in that it defines a predecessor to the current check-in.  But
whereas a P-card defines the immediate ancestor or a merge
ancestor, the Q-card is used to identify a single check-in or a small
range of check-ins which were cherry-picked for inclusion in or
exclusion from the current manifest.  The first argument of
the Q-card is the artifact ID of another manifest (the "target")
which has had its changes included or excluded in the current manifest.  
The target is preceeded by "+" or "-" to show inclusion or
exclusion, respectively.  The optional second argument to the
Q-card is another manifest artifact ID which is the "baseline"
for the cherry-pick.  If omitted, the baseline is the primary
parent of the target.  The
changes included or excluded consist of all changes moving from
the baseline to the target.  

to which the tag is to be applied. The
first value is the tag name.  The first character of the tag
is either "+", "-", or "*".  The "+" means the tag should be added
to the artifact.  The "-" means the tag should be removed.
The "*" character means the tag should be added to the artifact
and all direct descendants (but not descendents through a merge) down
to but not including the first descendant that contains a 
more recent "-" or "+" tag with the same name.
The optional third argument is the value of the tag.  A tag
without a value is a boolean.

When two or more tags with the same name are applied to the
same artifact, the tag with the latest (most recent) date is
used.

The D card is the date and time when the wiki page was edited.
The P card specifies the parent wiki pages, if any.  The L card
gives the name of the wiki page.  The optional N card specifies
the mimetype of the wiki text.  If the N card is omitted, the
mimetype is assumed to be text/x-fossil-wiki.  
The U card specifies the login
of the user who made this edit to the wiki page.  The Z card is
the usual checksum over the either artifact and is required.

The W card is used to specify the text of the wiki page.  The
argument to the W card is an integer which is the number of bytes
of text in the wiki page.  That text follows the newline character
that terminates the W card.  The wiki text is always followed by one
extra newline.

A single D card is required to give the date and time when the attachment
was applied.

There may be zero or one N cards.  The N card specifies the mimetype of the
comment text provided in the C card.  If the N card is omitted, the C card
mimetype is taken to be text/plain.

A single U card gives the name of the user to added the attachment.
If an attachment is added anonymously, then the U card may be omitted.

The Z card is the usual checksum over the rest of the attachment artifact.
The Z card is required.


<a name="event"></a>