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diff --git a/src/main/java/at/knowcenter/wag/egov/egiz/framework/Verificator.java b/src/main/java/at/knowcenter/wag/egov/egiz/framework/Verificator.java
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+/**
+ * <copyright> Copyright (c) 2006 by Know-Center, Graz, Austria </copyright>
+ * 
+ * This software is the confidential and proprietary information of Know-Center,
+ * Graz, Austria. You shall not disclose such Confidential Information and shall
+ * use it only in accordance with the terms of the license agreement you entered
+ * into with Know-Center.
+ * 
+ * KNOW-CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
+ * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ * NON-INFRINGEMENT. KNOW-CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
+ * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
+ * DERIVATIVES.
+ * 
+ * $Id: Verificator.java,v 1.1 2006/08/25 17:07:21 wprinz Exp $
+ */
+package at.knowcenter.wag.egov.egiz.framework;
+
+import java.util.List;
+
+import at.knowcenter.wag.egov.egiz.exceptions.PresentableException;
+import at.knowcenter.wag.exactparser.parsing.results.FooterParseResult;
+
+
+/**
+ * Given an Incremental Update Block and the corresponding PDF, a verificator
+ * extracts all Signatures of its type and returns them as valitatable
+ * SignatureHolders.
+ * 
+ * @author wprinz
+ */
+public interface Verificator
+{
+  /**
+   * Parses the given document/Block for signatures of this type.
+   * 
+   * @param pdf
+   *          The whole pdf document. A Verificator must only access the
+   *          document up to its given block (block.next_index) and must not
+   *          modify any byte in the pdf array.
+   * @param block
+   *          The incremental update block.
+   * @param start_of_whole_block
+   *          The start of the incremental update block (the end of the previous
+   *          block) - If 0, this is the first block (the original Document).
+   * @return Returns the List of SignatureHolder objects found for this block.
+   */
+  public List parseBlock(final byte[] pdf, final FooterParseResult block,
+      int start_of_whole_block) throws PresentableException;
+
+}