+
+ <p>
+ In <qref id="debiansourcecontrolfiles"> Debian source control</qref>
+ files, this field specifies a format revision for the source package.
+ The syntax of the format value is the same as that of a package version
+ number, except that no epoch or Debian revision is allowed
+ and that it can optionally be followed by a parenthesis with a name
+ <footnote>dpkg-source uses the major number and the content of the
+ parenthesis to decide which perl module to use to build or unpack
+ the source package. For instance, Dpkg::Source::Package::V1 for format
+ 1.0 and Dpkg::Source::Package::V3::quilt for format 3.0 (quilt)
+ </footnote>.
+ <p>