Fixed X(),Y() and Z() functions description

git-svn-id: http://svn.osgeo.org/postgis/branches/pgis_1_0@1919 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/doc/postgis.xml b/doc/postgis.xml
index da7dc088f9df2f824c94f5134746da3675ee7a4b..3cdd2f4c96e4b8badda50eb4afb3280680787dc0 100644 (file)
--- a/doc/postgis.xml
+++ b/doc/postgis.xml
@@ -3508,9 +3508,8 @@ dimension
             <term>X(geometry)</term>
 
             <listitem>
-              <para>Find and return the X coordinate of the first point in the
-              geometry. Return NULL if there is no point in the
-              geometry.</para>
+              <para>Return the X coordinate of the point, or NULL
+             if the geometry is not a point.</para>
             </listitem>
           </varlistentry>
 
@@ -3518,9 +3517,8 @@ dimension
             <term>Y(geometry)</term>
 
             <listitem>
-              <para>Find and return the Y coordinate of the first point in the
-              geometry. Return NULL if there is no point in the
-              geometry.</para>
+              <para>Return the Y coordinate of the point, or NULL
+             if the geometry is not a point.</para>
             </listitem>
           </varlistentry>
 
@@ -3528,9 +3526,8 @@ dimension
             <term>Z(geometry)</term>
 
             <listitem>
-              <para>Find and return the Z coordinate of the first point in the
-              geometry. Return NULL if there is no point in the
-              geometry.</para>
+              <para>Return the Z coordinate of the point, or NULL
+             if the geometry is not a point.</para>
             </listitem>
           </varlistentry>
         </variablelist>