documentation/poky-ref-manual: expand discussion of PR and INC_PR

Expands a little on PR and INC_PR.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/documentation/poky-ref-manual/ref-variables.xml b/documentation/poky-ref-manual/ref-variables.xml
index 98a501f399..da57e2c384 100644
--- a/documentation/poky-ref-manual/ref-variables.xml
+++ b/documentation/poky-ref-manual/ref-variables.xml
@@ -609,7 +609,7 @@ recipes-graphics/xorg-font/fiont-alias_1.0.2.bb:PR - "$(INC_PR).0"
 
         <glossentry id='var-PR'><glossterm>PR</glossterm>
             <glossdef>
-                <para>Revision of package.
+                <para>Revision of package. The default value is "r0".
                     </para>
             </glossdef>
         </glossentry>
@@ -617,7 +617,11 @@ recipes-graphics/xorg-font/fiont-alias_1.0.2.bb:PR - "$(INC_PR).0"
         <glossentry id='var-PV'><glossterm>PV</glossterm>
             <glossdef>
                 <para>Version of package.
-                    The default value is "1.0"</para>
+                    This is normally extracted from the recipe name, e.g. if the recipe is named 
+                    "expat_2.0.1.bb" then PV will be "2.0.1". PV is generally not overridden within 
+                    a recipe unless it is building an unstable version from a source code repository 
+                    (git, svn, etc.).
+                 </para>
             </glossdef>
         </glossentry>