X-Git-Url: http://git.kpe.io/?p=clsql.git;a=blobdiff_plain;f=doc%2Fref-ooddl.xml;h=54a7d8c3646701d64a88eacf192e760f7f145767;hp=e61a1cc014b5fec90321e10653973288e0f8c776;hb=75fc587eb38dc243370160823906f9cea60326df;hpb=e26e47c342e5a56655d97290cdf39425b670c9b0

diff --git a/doc/ref-ooddl.xml b/doc/ref-ooddl.xml
index e61a1cc..54a7d8c 100644
--- 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>