<para>Operating system vendors may extend the file
format and introduce new fields. It is highly
recommended to prefix new fields with an OS specific
- name in order to avoid name clashes. Example:
+ name in order to avoid name clashes. Applications
+ reading this file must ignore unknown fields. Example:
<literal>DEBIAN_BTS="debbugs://bugs.debian.org/"</literal></para>
</refsect1>