r9747: Version 2.11.13

[clsql.git] / doc / ref-ooddl.xml

diff --git a/doc/ref-ooddl.xml b/doc/ref-ooddl.xml
index e61a1cc014b5fec90321e10653973288e0f8c776..54a7d8c3646701d64a88eacf192e760f7f145767 100644 (file)
--- a/doc/ref-ooddl.xml
+++ b/doc/ref-ooddl.xml
@@ -494,6 +494,15 @@
        and a column type <parameter>VARCHAR2(100)</parameter> in
        &oracle;
       </para>
+      <para>
+       The actual lisp type for a slot may be different than the
+       value specified by the <parameter>:type</parameter> attribute.
+       For example, a slot declared with "<parameter>:type (string
+       30)</parameter>" actually sets the slots Lisp type as
+       <parameter>(or null string)</parameter>. This is to allow a
+       &nil; value or a string shorter than 30 characters to be
+       stored in the slot.
+      </para>
     </refsect1>
   </refentry>
 
@@ -687,6 +696,4 @@
   </refentry>
 
 
-
-
 </reference>