This patch includes:

1) Update and refine functions/header files comments
2) Try to use LinkedList library instance produced by BaseLib but not access linked list via pointer directly.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8641 6f19259b-4bc3-4df7-8a09-765794883524

IntelFrameworkModulePkg/Universal/DataHubDxe/DataHubDxe.inf

@@ -1,7 +1,26 @@
 #/** @file
-#  Component description file for DataHub module.
-#
 #  This driver initializes and installs the Data Hub protocol.
+#
+#  The data hub is a volatile database that is intended as the major focus for the accumulation of
+#  manageability data.T he hub is fed by "producers" with chunks of data in a defined format.
+#  Consumers may then extract the data in temporal "log" order.As an example, progress codes might
+#  be recorded in the data hub for future processing.Ot her data contributed to the data hub might
+#  include, for example, statistics on enumerated items such as memory, add-in buses, and add-in
+#  cards and data on errors encountered during boot (for example, the system did not boot off the
+#  network because the cable was not plugged in).
+#  Some classes of data have defined formats.For example, the amount of memory in the system is
+#  reported in a standard format so that consumers can be written to extract the data.O ther data is
+#  system specific.For example, additional detail on errors might be specific to the driver that
+#  discovered the error.The consumer might be a driver that tabularizes data from the data hub,
+#  providing a mechanism for the raw data to be made available to the OS for post-processing by
+#  OS-based applications.
+#  The intent of the data hub is for drivers that enumerate and configure parts of the system to report
+#  their discoveries to the data hub.This data can then be extracted by other drivers that report those
+#  discoveries using standard manageability interfaces such as SMBIOS and Intelligent Platform
+#  Management Interface (IPMI).The alternative to a data-hub-like architecture is to require all
+#  drivers to be aware of all reporting formats.
+#  For more information, please ref http://www.intel.com/technology/framework/
+#  
 #  Copyright (c) 2006 - 2009, Intel Corporation
 #
 #  All rights reserved. This program and the accompanying materials
@@ -51,7 +70,7 @@
 
 
 [Protocols]
-  gEfiDataHubProtocolGuid                       # PROTOCOL ALWAYS_PRODUCED
+  gEfiDataHubProtocolGuid                       # PROTOCOL PRODUCED
 
 
 [Depex]