merge documentation of the EDSP protocol

[apt.git] / doc / apt_preferences.5.xml

diff --git a/doc/apt_preferences.5.xml b/doc/apt_preferences.5.xml
index 54c01100c05866e16c9abeffd56329efbf63a127..219da7cd1ee2bc8289682655b8d4eb99e8a35b30 100644 (file)
--- a/doc/apt_preferences.5.xml
+++ b/doc/apt_preferences.5.xml
@@ -71,8 +71,10 @@ You have been warned.</para>
 directory are parsed in alphanumeric ascending order and need to obey the
 following naming convention: The files have no or "<literal>pref</literal>"
 as filename extension and which only contain alphanumeric,  hyphen (-),
-underscore (_) and period (.) characters - otherwise they will be silently
-ignored.</para>
+underscore (_) and period (.) characters.
+Otherwise APT will print a notice that it has ignored a file if the file
+doesn't match a pattern in the <literal>Dir::Ignore-Files-Silently</literal>
+configuration list - in this case it will be silently ignored.</para>
 
 <refsect2><title>APT's Default Priority Assignments</title>
 
@@ -103,12 +105,16 @@ algorithm to set the priorities of the versions of a package.  Assign:
 <varlistentry>
 <term>priority 1</term>
 <listitem><simpara>to the versions coming from archives which in their <filename>Release</filename>
-files are marked as "NotAutomatic: yes" like the debian experimental archive.</simpara></listitem>
+files are marked as "NotAutomatic: yes" but <emphasis>not</emphasis> as "ButAutomaticUpgrades: yes"
+like the debian <literal>experimental</literal> archive.</simpara></listitem>
 </varlistentry>
 
 <varlistentry>
 <term>priority 100</term>
-<listitem><simpara>to the version that is already installed (if any).</simpara></listitem>
+<listitem><simpara>to the version that is already installed (if any) and to the versions coming
+from archives which in their <filename>Release</filename> files are marked as "NotAutomatic: yes" and
+"ButAutomaticUpgrades: yes" like the debian backports archive since <literal>squeeze-backports</literal>.
+</simpara></listitem>
 </varlistentry>
 
 <varlistentry>
@@ -125,9 +131,10 @@ files are marked as "NotAutomatic: yes" like the debian experimental archive.</s
 
 <para>If the target release has not been specified then APT simply assigns
 priority 100 to all installed package versions and priority 500 to all
-uninstalled package versions, expect versions coming from archives which
+uninstalled package versions, except versions coming from archives which
 in their <filename>Release</filename> files are marked as "NotAutomatic: yes" -
-these versions get the priority 1.</para>
+these versions get the priority 1 or priority 100 if it is additionally marked
+as "ButAutomaticUpgrades: yes".</para>
 
 <para>APT then applies the following rules, listed in order of precedence,
 to determine which version of a package to install.