Don't call installed package IDs 'package IDs'; they're different.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

1 files changed, 12 insertions, 13 deletions

diff --git a/docs/users_guide/packages.xml b/docs/users_guide/packages.xml
index 3aaacea147..7a2543d3f5 100644
--- a/docs/users_guide/packages.xml
+++ b/docs/users_guide/packages.xml
@@ -183,7 +183,7 @@ exposed-modules: Network.BSD,
         <listitem>
           <para>
             Exposes a package like <option>-package</option>, but the
-            package is named by its ID rather than by name.  This is a
+            package is named by its installed package ID rather than by name.  This is a
             more robust way to name packages, and can be used to
             select packages that would otherwise be shadowed.  Cabal
             passes <option>-package-id</option> flags to GHC.
@@ -528,12 +528,11 @@ _ZCMain_main_closure
   </sect2>
 
   <sect2 id="package-ids">
-    <title>Package IDs, dependencies, and broken packages</title>
+    <title>Installed package IDs, dependencies, and broken packages</title>
 
     <para>Each installed package has a unique identifier (the
-      &ldquo;installed package ID&rdquo;, or just &ldquo;package
-      ID&rdquo; for short) , which distinguishes it from all other
-      installed packages on the system.  To see the package IDs
+      &ldquo;installed package ID&rdquo;), which distinguishes it from all other
+      installed packages on the system.  To see the installed package IDs
       associated with each installed package, use <literal>ghc-pkg
       list -v</literal>:</para>
 
@@ -549,10 +548,10 @@ using cache: /usr/lib/ghc-6.12.1/package.conf.d/package.cache
 </screen>
 
     <para>
-      The string in parentheses after the package name is the package
+      The string in parentheses after the package name is the installed package
       ID: it normally begins with the package name and version, and
       ends in a hash string derived from the compiled package.
-      Dependencies between packages are expressed in terms of package
+      Dependencies between packages are expressed in terms of installed package
       IDs, rather than just packages and versions.  For example, take
       a look at the dependencies of the <literal>haskell98</literal>
       package:
@@ -570,14 +569,14 @@ depends: array-0.2.0.1-9cbf76a576b6ee9c1f880cf171a0928d
 </screen>
 
     <para>
-      The purpose of the package ID is to detect problems caused by
+      The purpose of the installed package ID is to detect problems caused by
       re-installing a package without also recompiling the packages
       that depend on it.  Recompiling dependencies is necessary,
       because the newly compiled package may have a different ABI
       (Application Binary Interface) than the previous version, even
       if both packages were built from the same source code using the
-      same compiler.  With package IDs, a recompiled
-      package will have a different package ID from the previous
+      same compiler.  With installed package IDs, a recompiled
+      package will have a different installed package ID from the previous
       version, so packages that depended on the previous version are
       now orphaned - one of their dependencies is not satisfied.
       Packages that are broken in this way are shown in
@@ -692,7 +691,7 @@ haskell98-1.0.1.0
       packages.  A package specifier that matches all version of the package
       can also be written <replaceable>pkg</replaceable><literal>-*</literal>,
       to make it clearer that multiple packages are being matched.  To match
-      against the package ID instead of just package name and version,
+      against the installed package ID instead of just package name and version,
       pass the <option>--ipid</option> flag.</para>
 
     <variablelist>
@@ -1060,7 +1059,7 @@ ghc-pkg dot | tred | dot -Tpdf >pkgs.pdf
         </term>
         <listitem>
           <para>Causes <literal>ghc-pkg</literal> to interpret arguments
-          as package IDs (e.g., an identifier like
+          as installed package IDs (e.g., an identifier like
           <literal>unix-2.3.1.0-de7803f1a8cd88d2161b29b083c94240
           </literal>).  This is useful if providing just the package
           name and version are ambiguous (in old versions of GHC, this
@@ -1308,7 +1307,7 @@ haddock-html: /usr/share/doc/ghc/html/libraries/unix
           <indexterm><primary><literal>id</literal></primary><secondary>package specification</secondary></indexterm>
         </term>
         <listitem>
-          <para>The package ID.  It is up to you to choose a suitable
+          <para>The installed package ID.  It is up to you to choose a suitable
           one.</para>
         </listitem>
       </varlistentry>