man_dg class editor text about pointer attributes added

src/doc/man/en_us/man_dg.dat

@@ -6669,7 +6669,16 @@ the Array bit in Flags, and state the number of elements in the array in Element
 <image> ced_fig3.gif
 <b>Definition of an array attribute with 50 elements
 
+<b>Pointers
+There are two types of pointer attributes
 
+- relative pointers that can be used by serveral processes. The value is set with the 
+  gdh_StoreRtdbPointer() function and converted to an absolute pointer with
+  gdh_TranslateRtdbPointer(). Set the Pointer bit in Flags. Note! The size of the element the 
+  pointer is pointing at should be set in Size (in bytes).
+
+- absolute pointers. These can only be set and used by one single process. Set the Pointer 
+  bit and the Private bit in Flags.
 
 <b>Attribute objects
 The term attribute objects refer to attributes that are described by a data structure. The
@@ -6980,7 +6989,9 @@ pwrs:Type-AttrRef. The attribute is handled by the IoConnect method.
 
 <b>IoStatus
 If you want to fetch the status from the I/O-module object, you create the attribute 
-'IoStatus' of type pwrs:Type-$Status, and set the Pointer bit in Flags.
+'IoStatus' of type pwrs:Type-$Status, and set the Pointer bit in Flags. You also have
+to set 4 in Size (for relative pointers the size of what the pointer is pointing at, has
+to specified in Size).
 
 The attribute will be assigned a pointer to the Status attribute of the I/O-module in runtime 
 when the I/O handling is initialized. The Status attribute is of type Status and can for example