+ <para><literal>options</literal> is always optional and needs to be surounded by
+ square brackets. It can consist of multiple settings in the form
+ <literal><replaceable>setting</replaceable>=<replaceable>value</replaceable></literal>.
+ Multiple settings are separated by spaces. The following settings are supported by APT,
+ note through that unsupported settings will be ignored silently:
+ <itemizedlist><listitem><para><literal>arch=<replaceable>arch1</replaceable>,<replaceable>arch2</replaceable>,…</literal>
+ can be used to specify for which architectures packages information should
+ be downloaded. If this option is not set all architectures defined by the
+ <literal>APT::Architectures</literal> option will be downloaded.</para>
+ </listitem></itemizedlist></para>
+