<blockquote>
<i>YYYY</i><b>-</b><i>MM</i><b>-</b><i>DD</i><b>T</b><i>HH</i><b>:</b><i>MM</i><b>:</b><i>SS</i><br>
<i>YYYY</i><b>-</b><i>MM</i><b>-</b><i>DD</i><b>T</b><i>HH</i><b>:</b><i>MM</i><b>:</b><i>SS</i><b>.</b><i>SSS</i>
</blockquote>

A manifest has zero or more F-cards.  Each F-card identifies a file
that is part of the check-in.  There are one, two, three, or four arguments.
that is part of the check-in.  There are one, two, three, or four
The first argument
is the pathname of the file in the check-in relative to the root
of the project file hierarchy.  No ".." or "." directories are allowed
within the filename.  Space characters are escaped as in C-card
comment text.  Backslash characters and newlines are not allowed
within filenames.  The directory separator character is a forward
slash (ASCII 0x2F).  The second argument to the F-card is the
full 40-character lower-case hexadecimal SHA1 hash of the content
artifact.  The second argument is required for baseline manifests
but is optional for delta manifests.  When the second argument to the
F-card is omitted, it means that the file has been deleted relative
to the baseline.  The optional 3rd argument defines any special access 
permissions associated with the file.  The only special code currently
defined is "x" which means that the file is executable.  All files are
always readable and writable.  This can be expressed by "w" permission
if desired but is optional.  The file format might be extended with
arguments.  The first argument is the pathname of the file in the
check-in relative to the root of the project file hierarchy.  No ".."
or "." directories are allowed within the filename.  Space characters
are escaped as in C-card comment text.  Backslash characters and
newlines are not allowed within filenames.  The directory separator
character is a forward slash (ASCII 0x2F).  The second argument to the
F-card is the full 40-character lower-case hexadecimal SHA1 hash of
the content artifact.  The second argument is required for baseline
manifests but is optional for delta manifests.  When the second
argument to the F-card is omitted, it means that the file has been
deleted relative to the baseline (files removed in baseline manifests
versions are <em>not</em> added as F-cards). The optional 3rd argument
defines any special access permissions associated with the file.  This
can be defined as "x" to mean that the file is executable or "l"
(small letter ell) to mean a symlink.  All files are always readable
and writable.  This can be expressed by "w" permission if desired but
is optional.  The file format might be extended with new permission
new permission letters in the future.
The optional 4th argument is the name of the same file as it existed in
the parent check-in.  If the name of the file is unchanged from its
parent, then the 4th argument is omitted.
letters in the future.  The optional 4th argument is the name of the
same file as it existed in the parent check-in.  If the name of the
file is unchanged from its parent, then the 4th argument is omitted.

A manifest has zero or one N-cards.  The N-card specifies the mimetype for the
text in the comment of the C-card.  If the N-card is omitted, a default mimetype
is used.

A manifest has zero or one P-cards.  Most manifests have one P-card.
The P-card has a varying number of arguments that