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<p style="tab-stops: 292.5pt 315.0pt 319.5pt" align="center"><font face="Arial" color="#800000" size="4"><b>OPC
Core Components 2.00</b></font></p>
<p style="tab-stops: 292.5pt 315.0pt 319.5pt" align="center"><b>
<font face="Arial" color="#800000">November</font></b><font face="Arial" color="#800000" size="3"><b>
25, 2005</b></font></p>
<p><font face="Verdana" size="2"><a name="Overview"></a></font><b><font face="Arial" size="3">Overview</font></b></p>
<p><font face="Verdana" size="2">The latest version of this document always on the
OPC foundation <a href="http://opcfoundation.org/Downloads/Core%20Components/OPC%20Core%20Components%20Readme.htm">
website</a>. </font></p>
<p><font face="Verdana" size="2">Any use of the <i>OPC Core Components</i> is
subject to the terms the <a href="http://opcfoundation.org/Downloads/LicenseAgreement.asp">
OPC Foundation License Agreement</a>.</font></p>
<p><font face="Verdana" size="2">The <i>OPC Core Components</i> consists of all
shared OPC modules that need to be distributed by multiple vendors. These
modules include DCOM proxy/stub libraries, the OPC Server Enumerator, .NET
wrappers, etc. The <i>OPC Core Components </i>installer packages bundle modules
from all released specifications for convenience. OPC Foundation Members, who
have access to the source code version of the Core Components, may modify the
installation projects to suit their own needs.</font></p>
<p><i>A number of people have
encountered issues when incorporating the merge modules into
their install programs. These issues are caused by limitations
of the VS .NET environment that is used to build the merge
modules. For that reason, some users may need to start with
the source code for the merge modules and use it as sample
code when developing their own merge modules for the Core
Components. The OPC Foundation hopes to address this problem
in the future by using a different tool to create the merge
modules.</i></p>
<p><font face="Verdana" size="2">At this time the following modules are included in
this distribution:</font></p>
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<td align="center" bgColor="#000080" width="25%">
<p align="center"><b><font face="Verdana" color="#ffffff" size="2">File</font></b></p>
</td>
<td align="center" bgColor="#000080">
<p align="center"><b><font face="Verdana" color="#ffffff" size="2">Description</font></b></p>
</td>
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<td width="25%"><font face="Verdana" size="2">O<O:P>PC Common 1.10</font></td>
<td align="left"><font face="Verdana" size="2">Proxy/Stub DLL; .NET Wrapper;
IDL/Headers; Project Source Code<O:P></font></td>
</tr>
<tr>
<td width="25%"><font face="Verdana" size="2">OPC Server Enumerator 1.10<O:P>
</font>
</td>
<td align="left"><font face="Verdana" size="2">DCOM EXE Server; IDL/Headers;
Project Source Code<O:P></font></td>
</tr>
<tr>
<td width="25%"><font face="Verdana" size="2">OPC Data Access 2.05/3.00<b><O:P>
</b></font>
</td>
<td align="left"><font face="Verdana" size="2">Proxy/Stub DLL; .NET Wrapper;
IDL/Headers; Project Source Code<O:P></font></td>
</tr>
<tr>
<td width="25%"><font face="Verdana" size="2">OPC Data eXchange 1.00<b><O:P>
</b></font>
</td>
<td align="left"><font face="Verdana" size="2">Proxy/Stub DLL; .NET Wrapper;
WSDL/IDL/Headers; Project Source Code<O:P></font></td>
</tr>
<tr>
<td width="25%"><font face="Verdana" size="2">OPC Alarms & Events 1.10</font></td>
<td align="left"><font face="Verdana" size="2">Proxy/Stub DLL;
.NET Wrapper; IDL/Headers; Project
Source Code<O:P>
</font></td>
</tr>
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<td width="25%"><font face="Verdana" size="2">OPC Batch 2.00</font></td>
<td align="left"><font face="Verdana" size="2">Proxy/Stub DLL; .NET Wrapper;
IDL/Headers; Project
Source Code</font></td>
</tr>
<tr>
<td width="25%"><font face="Verdana" size="2">OPC Historical Data Access 1.10</font></td>
<td align="left"><font face="Verdana" size="2">Proxy/Stub DLL; .NET Wrapper;
IDL/Headers; Project Source Code</font></td>
</tr>
<tr>
<td width="25%"><font face="Verdana" size="2">OPC Security</font></td>
<td align="left"><font face="Verdana" size="2">Proxy/Stub DLL; .NET Wrapper;
IDL/Headers; Project Source Code</font></td>
</tr>
</tbody>
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<p><font face="Verdana" size="2"><a name="Version"></a></font><b><font face="Arial" size="3">Version
History</font></b></p>
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<td align="center" width="10%" bgColor="#000080"><b><font face="Verdana" color="#ffffff" size="2">Date</font></b></td>
<td align="center" width="10%" bgColor="#000080"><b><font face="Verdana" color="#ffffff" size="2">Version</font></b></td>
<td align="center" bgColor="#000080">
<p align="center"><b><font face="Verdana" color="#ffffff" size="2">Description</font></b></p>
</td>
</tr>
<tr>
<td align="center" width="10%"><font face="Verdana" size="2">2003-01-31</font></td>
<td align="center" width="10%"><font face="Verdana" size="2">1.00.0.07</font></td>
<td align="left"><font face="Verdana" size="2">First release.</font></td>
</tr>
<tr>
<td align="center" width="10%"><font face="Verdana" size="2">2003-02-06</font></td>
<td align="center" width="10%"><font face="Verdana" size="2">1.01.0.00</font></td>
<td align="left"><font face="Verdana" size="2">Incorporates currently released
shared modules for all specifications.</font></td>
</tr>
<tr>
<td align="center" width="10%"><font face="Verdana" size="2">2003-02-12</font></td>