+#. type: Content of: <refentry><refsect1><para><itemizedlist><listitem><para>
+#: sources.list.5.xml:1
+msgid ""
+"<option>PDiffs</option> (<option>pdiffs</option>) is a yes/no value which "
+"controls if APT should try to use PDiffs to update old indexes instead of "
+"downloading the new indexes entirely. The value of this option is ignored if "
+"the repository doesn't announce the availability of PDiffs. Defaults to the "
+"value of the option with the same name for a specific index file defined in "
+"the <option>Acquire::IndexTargets</option> scope, which itself defaults to "
+"the value of configuration option <option>Acquire::PDiffs</option> which "
+"defaults to <literal>yes</literal>."
+msgstr ""
+
+#. type: Content of: <refentry><refsect1><para><itemizedlist><listitem><para>
+#: sources.list.5.xml:1
+msgid ""
+"<option>By-Hash</option> (<option>by-hash</option>) can have the value "
+"<literal>yes</literal>, <literal>no</literal> or <literal>force</literal> "
+"and controls if APT should try to acquire indexes via a URI constructed from "
+"a hashsum of the expected file instead of using the well-known stable "
+"filename of the index. Using this can avoid hashsum mismatches, but requires "
+"a supporting mirror. A <literal>yes</literal> or <literal>no</literal> value "
+"activates/disables the use of this feature if this source indicates support "
+"for it, while <literal>force</literal> will enable the feature regardless of "
+"what the source indicates. Defaults to the value of the option of the same "
+"name for a specific index file defined in the "
+"<option>Acquire::IndexTargets</option> scope, which itself defaults to the "
+"value of configuration option <option>Acquire::By-Hash</option> which "
+"defaults to <literal>yes</literal>."
+msgstr ""
+