+ <varlistentry>
+ <term><varname>_UDEV_SYSNAME=</varname></term>
+ <listitem>
+ <para>The kernel device name
+ as it shows up in the device
+ tree below
+ <filename>/sys</filename>.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>_UDEV_DEVNODE=</varname></term>
+ <listitem>
+ <para>The device node path of
+ this device in
+ <filename>/dev</filename>.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>_UDEV_DEVLINK=</varname></term>
+ <listitem>
+ <para>Additional symlink names
+ pointing to the device node in
+ <filename>/dev</filename>. This
+ field is frequently set more
+ than once per entry.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Special Journal Fields</title>
+
+ <para>Fields used by the <command>systemd-coredump</command>
+ coredump kernel helper.
+ </para>
+
+ <variablelist class='journal-directives'>
+ <varlistentry>
+ <term><varname>COREDUMP_UNIT=</varname></term>
+ <term><varname>COREDUMP_USER_UNIT=</varname></term>
+ <listitem>
+ <para>Used to annotate
+ messages containing coredumps from
+ system and session units.
+ See
+ <citerefentry><refentrytitle>systemd-coredumpctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
+ </para>
+ </listitem>
+ </varlistentry>