diff --git a/src/main/java/w2phtml/rdf/RDFDocument.java b/src/main/java/w2phtml/rdf/RDFDocument.java
index da17130..774a42f 100644
--- a/src/main/java/w2phtml/rdf/RDFDocument.java
+++ b/src/main/java/w2phtml/rdf/RDFDocument.java
@@ -42,7 +42,7 @@ public class RDFDocument {
 	private static final String AUTHOR_GIVEN_NAME = "author given name";
 	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 TOC_ITEM = "TOCItem";
 	private static final String TS = "https://litvinovg.pro/text_structures#";
 	private static final String POINTS_TO = TS + "pointsTo";
 	private static final String ITEM_NUMBER = TS + "itemNumber";
@@ -91,7 +91,7 @@ public class RDFDocument {
 		this.tocClass = textOntology.createClass(TS + TABLE_OF_CONTENTS);
 		this.organizationClass = textOntology.createClass(TS + ORGANIZATION);
 		this.participantClass = textOntology.createClass(TS + PARTICIPANT);
-		this.itemClass = textOntology.createClass(TS + TOCITEM);
+		this.itemClass = textOntology.createClass(TS + TOC_ITEM);
 		formatDocID(fileName);
 		this.currentTime = Calendar.getInstance().getTime();
 		setPublicationType(config.getRDFType());
@@ -380,7 +380,7 @@ public class RDFDocument {
 		return true;
 	}
 	private void createTOCItem(DocumentPart docPart) {
-		String tocItemUri = TS + TOCITEM + "/" + docID + docPart.getSafePath();
+		String tocItemUri = TS + TOC_ITEM + "/" + docID + docPart.getSafePath();
 		Resource tocItem = m.createIndividual(tocItemUri,itemClass);
 		tocItem.addProperty( RDFS.label, docPart.getName());
 		Property pointsTo = m.createProperty(POINTS_TO);