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diff --git a/SA_POP/TaskImpl.h b/SA_POP/TaskImpl.h
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+// -*- C++ -*-
+// $Id$
+
+//=============================================================================
+/**
+ * @file  TaskImpl.h
+ *
+ * This file contains the TaskImpl class definition for the encapsulation
+ * of a task implementation's details.
+ *
+ * @author  John S. Kinnebrew <john.s.kinnebrew@vanderbilt.edu>
+ */
+//=============================================================================
+
+#ifndef SA_POP_TASK_IMPL_H_
+#define SA_POP_TASK_IMPL_H_
+
+#include "SA_POP_Types.h"
+
+namespace SA_POP {
+
+  /**
+   * @class TaskImpl
+   *
+   * @brief Encapsulation of a task implementation's details.
+   */
+  class TaskImpl {
+  public:
+    /// Constructor.
+    /**
+     * @param id  Unique ID of this task implementation.
+     *
+     * @param params  Implementation parameters (ID, kind, and value).
+     */
+    TaskImpl (TaskImplID id, const ImplParamSet &params);
+
+    /// Destructor.
+    virtual ~TaskImpl (void);
+
+    /// Set duration.
+    /**
+     * @param duration  Duration of implementation.
+     */
+    virtual void set_duration (TimeValue duration);
+    /// Get duration.
+    /**
+     * @return Duration of implementation.
+     */
+    virtual TimeValue get_duration (void);
+
+    /// Add resource utilization.
+    /**
+     * @param id  Resource id.
+     *
+     * @param value  Resource utilization value.
+     */
+    virtual void add_resource (ResourceID id, ResourceValue value);
+
+    /// Get task implementation id.
+    /**
+     * @return  Unique ID of this this task implementation.
+     */
+    virtual TaskImplID get_id (void);
+
+    /// Get task implementation parameters.
+    /**
+     * @return  Set of parameters for this implementation.
+     */
+    virtual ImplParamSet get_params (void);
+
+    /// Get utilization of a resource.
+    /**
+     * @param resource_id  The resource id.
+     *
+     * @return  The quantity of resource used.
+     */
+    virtual ResourceValue get_resource_usage (ResourceID resource_id);
+
+    /// Get all resources with utilization.
+    /**
+     * @return  The set of all resources used (with associated usage values).
+     */
+    virtual const ResourceMap& get_all_resources ();
+
+  protected:
+    /// Unique ID of the task implementation.
+    TaskImplID id_;
+
+    /// Set of parameters.
+    ImplParamSet params_;
+
+    /// Duration.
+    TimeValue duration_;
+
+    /// Map from resource IDs to resource utilization.
+    ResourceMap resources_;
+  };
+
+};  /* SA_POP namespace */
+
+#endif /* SA_POP_TASK_IMPL_H_ */