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diff --git a/system/general/src/main/java/org/wamblee/system/graph/component/package-info.java b/system/general/src/main/java/org/wamblee/system/graph/component/package-info.java
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+/**
+ * <h1>Graph component package </h1>
+ * 
+ * The graph component package provides the representation of a number of 
+ * components {@link Component} 
+ * their required and provided interfaces ({@link RequiredInterface} and 
+ * {@link ProvidedInterface}), and how these are connected together.
+ * 
+ * This package provides the bridge between the component model and the 
+ * representation of the components and their connections in a graph. 
+ * The component package provides various algorithms, filters, and 
+ * validations that are required for the implementation of a container. 
+ * 
+ * The main abstractions are: 
+ * <ul>
+ *   <li> {@link ComponentGraph}: A graph of components. This provides the logic
+ *   for creating a graph based on components. </li>
+ *   <li> {@link ComponentNode}: A node representing a component. </li>
+ *   <li> {@link RequiredInterfaceNode}: A node representing a required interface of a component. </li>
+ *   <li> {@link ProvidedInterfaceNode}: A node repesenting a provided interface of a component. </li>
+ *   <li> {@link ExternalRequiredInterfaceNode}: A node representing a required interface of a container </li>
+ *   <li> {@link ExternalProvidedInterfaceNode}: A node representing a provided interface of a container </li>  
+ * </ul> 
+ *
+ */
+package org.wamblee.system.graph.component;
+
+import org.wamblee.system.core.Component;
+import org.wamblee.system.core.ProvidedInterface;
+import org.wamblee.system.core.RequiredInterface;
+

diff --git a/system/general/src/main/java/org/wamblee/system/graph/package-info.java b/system/general/src/main/java/org/wamblee/system/graph/package-info.java
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+/**
+ * <h1>Graph package</h1>
+ * 
+ * The graph package provides a general very simple abstraction of a graph. 
+ * It was developed for the IOC container to represent dependences between 
+ * components through their required and provided interfaces.
+ * 
+ * The graph package supports a number of simple graph traversal operations, graph
+ * extension operations, and a visitor pattern. 
+ * 
+ * The main abstractions are: 
+ * <ul>
+ *    <li> {@link Graph}: The graph itself. </li> 
+ *    <li> {@link Node}: A node of a graph. </li>
+ *    <li> {@link Edge}: An edge of a graph> </li>
+ *    <li> {@link Visitor}: A visitor for implementing various operations on a graph. </li>
+ *    <li> {@link EdgeFactory}: For extending the graph with new edges </li>
+ * </ul>
+ */
+package org.wamblee.system.graph;
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