diff --git a/src/main/java/w2phtml/rdf/DocumentStructure.java b/src/main/java/w2phtml/rdf/DocumentStructure.java
index 15ee1df..d0f1c3d 100644
--- a/src/main/java/w2phtml/rdf/DocumentStructure.java
+++ b/src/main/java/w2phtml/rdf/DocumentStructure.java
@@ -5,11 +5,14 @@ import java.io.FileWriter;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
+import java.util.TimeZone;
 import java.util.Vector;
-
+import java.text.SimpleDateFormat;
 import org.apache.jena.ontology.OntClass;
 import org.apache.jena.ontology.OntModel;
 import org.apache.jena.rdf.model.ModelFactory;
@@ -23,7 +26,8 @@ import org.apache.jena.rdf.model.Property;
 
 
 public class DocumentStructure {
-	private static final String HTML_EXCERPT_PROPERTY = "htmlExcerpt";
+	private static final String MODIFICATION_TIME = "modificationTime";
+  private static final String HTML_EXCERPT_PROPERTY = "htmlExcerpt";
 	private static final String TOCITEM = "TOCItem";
 	private static final String TS = "https://litvinovg.pro/text_structures#";
 	private static final String PARSERNAME = "w2phtml"; 
@@ -58,6 +62,7 @@ public class DocumentStructure {
 	private HashMap<String, Resource> tocLevels;
 	private HashMap<String, DocumentPart> inputParts;
 	private Metadata metadata;
+  private Date currentTime;
 	
 	public DocumentStructure(Vector<XhtmlDocument> files,String fileName, XhtmlConfig config,Metadata metadata) {
 		this.tocLevels = new HashMap<String, Resource>();
@@ -71,6 +76,7 @@ public class DocumentStructure {
 		this.participantClass = textOntology.createClass(TS + PARTICIPANT);
 		this.itemClass = textOntology.createClass(TS + TOCITEM);
 		this.docID = fileName;
+		this.currentTime = Calendar.getInstance().getTime();
 		String publicationType = config.getRDFType();
 		setPublicationType(publicationType);
 		this.documentClass = textOntology.createClass(TS + documentType);
@@ -161,6 +167,7 @@ public class DocumentStructure {
 	private Resource createExcerpt(DocumentPart docExcerpt) {
 		String excerptName = TS + excerptType + "/" + PARSERNAME + "_" + docID + docExcerpt.getSafePath();
 		Resource excerpt = m.createIndividual(excerptName, excerptClass);
+		addModificationTime(excerpt);
 		if (!docExcerpt.getBody().isEmpty()) {
 			Property htmlExcerpt = m.createProperty(TS + HTML_EXCERPT_PROPERTY);
 			excerpt.addLiteral(htmlExcerpt, docExcerpt.getBody());	
@@ -180,8 +187,10 @@ public class DocumentStructure {
 		String documentURI = TS + documentType + "/" + PARSERNAME + "_" + docID ;
 		Resource mainResource = m.createResource(documentURI, documentClass);
 		mainResource.addProperty( RDFS.label, docPart.getName());
+		
+	  addModificationTime(mainResource);
+		
 		String tocURI = TS + TABLE_OF_CONTENTS + "/" + PARSERNAME + "_" + docID ;
-
 		Resource toc = m.createResource(tocURI, tocClass);
 		toc.addProperty( RDFS.label, docPart.getName());
 
@@ -193,6 +202,14 @@ public class DocumentStructure {
 		tocLevels.put(docPart.getPath(), toc);
 		attachExcerpt(docPart, toc);	
 	}
+
+  private void addModificationTime(Resource mainResource) {
+    Property property = m.createProperty(TS + MODIFICATION_TIME);
+    SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
+    sd.setTimeZone(TimeZone.getTimeZone("GMT"));
+    String todayAsString = sd.format(currentTime);
+	  mainResource.addProperty( property, todayAsString);
+  }
 	
 	private void addAuthor(Resource resource, DocumentPart docPart) {
 		String order = docPart.getOrder();