Cross-reference special properties in column attribute section of manual.

Patch by Gregory J. Grubbs.

doc/ChangeLog

@@ -1,3 +1,8 @@
+2009-11-18  Carsten Dominik  <carsten.dominik@gmail.com>
+
+	* org.texi (Column attributes): Cross-reference special
+	properties.
+
 2009-11-14  Carsten Dominik  <carsten.dominik@gmail.com>
 
 	* org.texi (Speed keys): New section.

doc/org.texi

@@ -4587,29 +4587,31 @@ optional.  The individual parts have the following meaning:
 
 @example
 @var{width}           @r{An integer specifying the width of the column in characters.}
-		@r{If omitted, the width will be determined automatically.}
+                @r{If omitted, the width will be determined automatically.}
 @var{property}        @r{The property that should be edited in this column.}
+                @r{Special properties representing meta data are allowed here}
+                @r{as well (@pxref{Special properties})}
 (title)         @r{The header text for the column. If omitted, the}
-		@r{property name is used.}
+                @r{property name is used.}
 @{@var{summary-type}@}  @r{The summary type.  If specified, the column values for}
-		@r{parent nodes are computed from the children.}
-		@r{Supported summary types are:}
-		@{+@}       @r{Sum numbers in this column.}
-		@{+;%.1f@}  @r{Like @samp{+}, but format result with @samp{%.1f}.}
-		@{$@}       @r{Currency, short for @samp{+;%.2f}.}
-		@{:@}       @r{Sum times, HH:MM:SS, plain numbers are hours.}
-		@{X@}       @r{Checkbox status, @samp{[X]} if all children are @samp{[X]}.}
-		@{X/@}      @r{Checkbox status, @samp{[n/m]}.}
-		@{X%@}      @r{Checkbox status, @samp{[n%]}.}
-		@{min@}     @r{Smallest number in column.}
-		@{max@}     @r{Largest number.}
-		@{mean@}    @r{Arithmetic mean of numbers.}
-		@{:min@}    @r{Smallest time value in column.}
-		@{:max@}    @r{Largest time value.}
-		@{:mean@}   @r{Arithmetic mean of time values.}
-		@{@@min@}   @r{Minimum age (in days/hours/mins/seconds).}
-		@{@@max@}   @r{Maximum age (in days/hours/mins/seconds).}
-		@{@@mean@}  @r{Arithmetic mean of ages (in days/hours/mins/seconds).}
+                @r{parent nodes are computed from the children.}
+                @r{Supported summary types are:}
+                @{+@}       @r{Sum numbers in this column.}
+                @{+;%.1f@}  @r{Like @samp{+}, but format result with @samp{%.1f}.}
+                @{$@}       @r{Currency, short for @samp{+;%.2f}.}
+                @{:@}       @r{Sum times, HH:MM:SS, plain numbers are hours.}
+                @{X@}       @r{Checkbox status, @samp{[X]} if all children are @samp{[X]}.}
+                @{X/@}      @r{Checkbox status, @samp{[n/m]}.}
+                @{X%@}      @r{Checkbox status, @samp{[n%]}.}
+                @{min@}     @r{Smallest number in column.}
+                @{max@}     @r{Largest number.}
+                @{mean@}    @r{Arithmetic mean of numbers.}
+                @{:min@}    @r{Smallest time value in column.}
+                @{:max@}    @r{Largest time value.}
+                @{:mean@}   @r{Arithmetic mean of time values.}
+                @{@@min@}   @r{Minimum age (in days/hours/mins/seconds).}
+                @{@@max@}   @r{Maximum age (in days/hours/mins/seconds).}
+                @{@@mean@}  @r{Arithmetic mean of ages (in days/hours/mins/seconds).}
 @end example
 
 @noindent