note about attr key col's new cats (merge from devbr6)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@34240 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/v.dissolve/v.dissolve.html

@@ -2,16 +2,20 @@
 
 The <EM>v.dissolve</EM> module is used to merge adjacent areas in a vector
 map which share the same category value. The resulting merged area(s) retains
-this category value. Optionally, a column can be defined which is used
-to find adjacent polygons with identical attribute for common boundary
-dissolving.
+this category value. Alternatively an integer or string column can be defined
+which is used to find adjacent polygons with identical attribute for common
+boundary dissolving. In this case the categories are not retained, only the
+values of the new key column. See the <em>v.extract</em> help page for details.
+
+
+<h2>NOTES</h2>
 
 GRASS defines a vector area as composite entity consisting of a set of
 closed boundaries and a centroid. The centroids must contain a
 category number
 (see <em><a href="v.centroids.html">v.centroids</a></em>), this number
 is linked to area attributes and database links.
-
+<P>
 Multiple attributes may be linked to a single vector entity through
 numbered fields referred to as layers. Refer
 to <em><a href="v.category.html">v.category</a></em> for more details.
@@ -23,6 +27,7 @@ In fact, <a href="v.dissolve.html">v.dissolve</a> is simply a
 front-end to that module. The use of the <EM>column</EM> parameter
 adds a call to <em><a href="v.reclass.html">v.reclass</a></em> before.
 
+
 <h2>EXAMPLES</h2>
 
 <h3>Basic use</h3>
@@ -56,6 +61,7 @@ v.clean clc2000_patched out=clc2000_clean tool=snap,break,rmdupl thresh=.01
 v.dissolve input=clc2000_clean output=clc2000_final col=CODE_00
 </pre></div>
 
+
 <H2>SEE ALSO</H2>
 
 <EM>
@@ -65,6 +71,7 @@ v.dissolve input=clc2000_clean output=clc2000_final col=CODE_00
 <A HREF="v.reclass.html">v.reclass</A>
 </EM>
 
+
 <H2>AUTHORS</H2>
 
 module: M. Hamish Bowman, Dept. Marine Science, Otago University, New Zealand<br>