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Overview (CDO Model Repository Documentation)
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<H1>
<h1>CDO Model Repository Documentation</h1>
</H1>
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CDO is both a development-time model repository and a run-time persistence framework; being highly optimized it supports object graphs of arbitrary size.
<P>
<B>See:</B>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<A HREF="#overview_description"><B>Description</B></A>
<P>

<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Client</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/package-summary.html">org.eclipse.emf.cdo</A></B></TD>
<TD>Client concepts like <A HREF="org/eclipse/emf/cdo/CDOObject.html" title="interface in org.eclipse.emf.cdo"><CODE>CDOObject</CODE></A> and <A HREF="org/eclipse/emf/cdo/CDOState.html" title="enum in org.eclipse.emf.cdo"><CODE>CDOState</CODE></A>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/eresource/package-summary.html">org.eclipse.emf.cdo.eresource</A></B></TD>
<TD>The generated EMF API of the CDO repository file system.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/eresource/impl/package-summary.html">org.eclipse.emf.cdo.eresource.impl</A></B></TD>
<TD>The generated EMF implementation of the CDO repository file system.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/eresource/util/package-summary.html">org.eclipse.emf.cdo.eresource.util</A></B></TD>
<TD>The generated EMF utilities of the CDO repository file system.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/etypes/package-summary.html">org.eclipse.emf.cdo.etypes</A></B></TD>
<TD>The generated EMF API of the CDO system data types and native annotations.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/etypes/impl/package-summary.html">org.eclipse.emf.cdo.etypes.impl</A></B></TD>
<TD>The generated EMF implementation of the CDO system data types and native annotations.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/etypes/util/package-summary.html">org.eclipse.emf.cdo.etypes.util</A></B></TD>
<TD>The generated EMF utilities of the CDO system data types and native annotations.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/session/package-summary.html">org.eclipse.emf.cdo.session</A></B></TD>
<TD>Client concepts for dealing with sessions to CDO repositories.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/session/remote/package-summary.html">org.eclipse.emf.cdo.session.remote</A></B></TD>
<TD>Client concepts for the communication and collaboration with other sessions.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/transaction/package-summary.html">org.eclipse.emf.cdo.transaction</A></B></TD>
<TD>Client concepts for dealing with transactions, distributed transactions and their save points.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/util/package-summary.html">org.eclipse.emf.cdo.util</A></B></TD>
<TD>Client utility classes, some common interfaces and exceptions.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/view/package-summary.html">org.eclipse.emf.cdo.view</A></B></TD>
<TD>Client concepts for dealing with views, view sets, queries, CDO objects and EMF resource sets.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/internal/cdo/package-summary.html">org.eclipse.emf.internal.cdo</A></B></TD>
<TD>Exposes <A HREF="org/eclipse/emf/internal/cdo/CDOObjectImpl.html" title="class in org.eclipse.emf.internal.cdo"><CODE>CDOObjectImpl</CODE></A> for extension in generated EMF models.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/spi/cdo/package-summary.html">org.eclipse.emf.spi.cdo</A></B></TD>
<TD>Client service provider interfaces and useful base implementations.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Client Edit Support</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/edit/package-summary.html">org.eclipse.emf.cdo.edit</A></B></TD>
<TD>Useful base classes that can be referenced from custom EMF generator models.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/eresource/provider/package-summary.html">org.eclipse.emf.cdo.eresource.provider</A></B></TD>
<TD>The generated EMF edit support of the CDO repository file system.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/etypes/provider/package-summary.html">org.eclipse.emf.cdo.etypes.provider</A></B></TD>
<TD>The generated EMF edit support of the CDO system data types and native annotations.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Client Location</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/location/package-summary.html">org.eclipse.emf.cdo.location</A></B></TD>
<TD>Client concepts for dealing with repository locations and checkout sources.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Client Net4j Support</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/net4j/package-summary.html">org.eclipse.emf.cdo.net4j</A></B></TD>
<TD>Client concepts for dealing with Net4j-based sessions to remote repositories.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Client UI</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/ui/package-summary.html">org.eclipse.emf.cdo.ui</A></B></TD>
<TD>Reusable UI components specific to the CDO Model Repository.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/ui/widgets/package-summary.html">org.eclipse.emf.cdo.ui.widgets</A></B></TD>
<TD>A library with reusable widgets.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Client UI IDE</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/ui/ide/package-summary.html">org.eclipse.emf.cdo.ui.ide</A></B></TD>
<TD>Reusable UI IDE components specific to the CDO Model Repository.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Common</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/package-summary.html">org.eclipse.emf.cdo.common</A></B></TD>
<TD>Common concepts that are differently extended in clients and servers.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/branch/package-summary.html">org.eclipse.emf.cdo.common.branch</A></B></TD>
<TD>Common concepts for dealing with branches.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/commit/package-summary.html">org.eclipse.emf.cdo.common.commit</A></B></TD>
<TD>Common concepts for dealing with commits and change sets.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/commit/handler/package-summary.html">org.eclipse.emf.cdo.common.commit.handler</A></B></TD>
<TD>Some useful commit info handler implementations.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/id/package-summary.html">org.eclipse.emf.cdo.common.id</A></B></TD>
<TD>Common concepts for dealing with object and revision IDs.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/lob/package-summary.html">org.eclipse.emf.cdo.common.lob</A></B></TD>
<TD>Common concepts for dealing with large binary objects and large character objects.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/lock/package-summary.html">org.eclipse.emf.cdo.common.lock</A></B></TD>
<TD>Common concepts for dealing with durable locks and views.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/model/package-summary.html">org.eclipse.emf.cdo.common.model</A></B></TD>
<TD>Common concepts for dealing with models and types.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/protocol/package-summary.html">org.eclipse.emf.cdo.common.protocol</A></B></TD>
<TD>Common concepts for dealing with protocols and CDO-specific I/O.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/revision/package-summary.html">org.eclipse.emf.cdo.common.revision</A></B></TD>
<TD>Common concepts for dealing with revisions and revision lists.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/revision/delta/package-summary.html">org.eclipse.emf.cdo.common.revision.delta</A></B></TD>
<TD>Common concepts for dealing with revision deltas and feature deltas.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/common/util/package-summary.html">org.eclipse.emf.cdo.common.util</A></B></TD>
<TD>Common utility classes, some common interfaces and exceptions.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/spi/common/package-summary.html">org.eclipse.emf.cdo.spi.common</A></B></TD>
<TD>Common service provider interfaces and useful base implementations.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/spi/common/branch/package-summary.html">org.eclipse.emf.cdo.spi.common.branch</A></B></TD>
<TD>Common service provider interfaces and useful base implementations for dealing with branches.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/spi/common/commit/package-summary.html">org.eclipse.emf.cdo.spi.common.commit</A></B></TD>
<TD>Common service provider interfaces and useful base implementations for dealing with commits and change sets.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/spi/common/id/package-summary.html">org.eclipse.emf.cdo.spi.common.id</A></B></TD>
<TD>Common service provider interfaces and useful base implementations for dealing with object and revision IDs.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/spi/common/lock/package-summary.html">org.eclipse.emf.cdo.spi.common.lock</A></B></TD>
<TD>Common service provider interfaces and useful base implementations for dealing with object locks.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/spi/common/model/package-summary.html">org.eclipse.emf.cdo.spi.common.model</A></B></TD>
<TD>Common service provider interfaces and useful base implementations for dealing with models and types</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/spi/common/revision/package-summary.html">org.eclipse.emf.cdo.spi.common.revision</A></B></TD>
<TD>Common service provider interfaces and useful base implementations for dealing with revisions and deltas.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Server</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/package-summary.html">org.eclipse.emf.cdo.server</A></B></TD>
<TD>Server concepts for dealing with repositories and stores.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/embedded/package-summary.html">org.eclipse.emf.cdo.server.embedded</A></B></TD>
<TD>Server concepts for dealing with embedded sessions.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/mem/package-summary.html">org.eclipse.emf.cdo.server.mem</A></B></TD>
<TD>Server concepts for dealing with in-memory stores.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/spi/server/package-summary.html">org.eclipse.emf.cdo.spi.server</A></B></TD>
<TD>Server service provider interfaces and useful base implementations.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Server DB</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/db/package-summary.html">org.eclipse.emf.cdo.server.db</A></B></TD>
<TD>Server concepts for dealing with DB stores and accessors.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/db/mapping/package-summary.html">org.eclipse.emf.cdo.server.db.mapping</A></B></TD>
<TD>Server concepts for dealing with mapping strategies and mappings for classes, lists and types.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Server DB4O</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/db4o/package-summary.html">org.eclipse.emf.cdo.server.db4o</A></B></TD>
<TD>Server concepts for dealing with DB4O stores and accessors.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Server Hibernate</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/hibernate/package-summary.html">org.eclipse.emf.cdo.server.hibernate</A></B></TD>
<TD>Server concepts for dealing with Hibernate stores and accessors.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Server MongoDB</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/mongodb/package-summary.html">org.eclipse.emf.cdo.server.mongodb</A></B></TD>
<TD>Server concepts for dealing with MongoDB stores and accessors.</TD>
</TR>
</TABLE>

<P>
&nbsp;
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>CDO Model Repository Server Net4j Support</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/net4j/package-summary.html">org.eclipse.emf.cdo.server.net4j</A></B></TD>
<TD>Server concepts for dealing with Net4j-based repositories and fail-over infrastructure.</TD>
</TR>
</TABLE>

<P>
&nbsp;
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<B>CDO Model Repository Server OCL Support</B></FONT></TH>
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<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/ocl/package-summary.html">org.eclipse.emf.cdo.server.ocl</A></B></TD>
<TD>Server implementation of a generic OCL query handler.</TD>
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<B>CDO Model Repository Server Objectivity</B></FONT></TH>
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<TD WIDTH="20%"><B><A HREF="org/eclipse/emf/cdo/server/objectivity/package-summary.html">org.eclipse.emf.cdo.server.objectivity</A></B></TD>
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&nbsp;<A NAME="overview_description"><!-- --></A>
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CDO is both a development-time model repository and a run-time persistence framework; being highly optimized it supports object graphs of arbitrary size.
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<img src="resources/CDOOverview.png"/>
        
<p>
CDO offers transactions with save points, explicit locking, change notification, remote queries, temporality, branching, merging, offline and fail-over modes.
The storage back-end is pluggable and migrations between direct JDBC, Hibernate, Objectivity/DB, MongoDB or DB4O are seamless for CDO applications. 
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