Improve the document structure in several places

Change-Id: Icea6d0b0d9628eb171f5673b397f1db7f1c5c5b8
diff --git a/link.rst b/link.rst
index f031d04..d792c5a 100644
--- a/link.rst
+++ b/link.rst
@@ -1,9 +1,9 @@
-.. _link:
+.. _Link:
 
 Link Object
 -----------
 
-The Link Object is a specialized form of a :ref:`Data packet <data>` packet, defined as follows::
+The Link Object is a specialized form of a :ref:`Data packet <Data>`, defined as follows::
 
     LinkObject = DATA-TYPE TLV-LENGTH
                    Name