/// <summary>
/// Constructor for the <c>ReadGraph</c> object. This is used
/// to create graphs that are used for reading objects from the XML
/// document. The specified strategy is used to acquire the names
/// of the special attributes used during the serialization.
/// </summary>
/// <param name="contract">
/// this is the name scheme used by the strategy
/// </param>
/// <param name="loader">
/// this is the class loader to used for the graph
/// </param>
public ReadGraph(Contract contract, Loader loader) {
this.refer = contract.getReference();
this.mark = contract.getIdentity();
this.length = contract.getLength();
this.label = contract.getLabel();
this.loader = loader;
}