Appeal No. 1999-2720
Application No. 08/580,965
that "Using deltas is a classical space-time tradeoff: deltas
reduce the space consumed but increase access time. However,
a version control tool should impose as little delay as
possible on programmers . . . . To gain reasonably fast
access time for both editing and compiling, RCS arranges
deltas in the following way. The most recent revisions on the
trunk is stored intact. All other revisions on the trunk are
stored as reverse deltas." (Appellant's emphasis).
Appellant also points to Tichy's disclosure5 stating "The
naive solution would be to store complete copies for the tips
of all branches. Clearly, this approach would cost too much
space." (Appellant's emphasis). Hence, Appellant concludes
that not only does Tichy neither teach nor hint of a version
control system that uses revision complete revision copies,
Tichy teaches away from such a system.
In addition, Appellant asserts that in view of Tichy's
application of this methodology, Tichy indicates that adding a
new revision to the trunk is fast, because all that is needed
is
5Page PSD:13-5, Section 3.2, paragraph 4
7
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