diff --git a/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/ModelHardLimits.java b/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/ModelHardLimits.java
index ea40509..443a496 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/ModelHardLimits.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/ModelHardLimits.java
@@ -14,7 +14,9 @@ public class ModelHardLimits {
 	public static final int MAX_AUTHOR_FULLNAME_LENGTH = 1000;
 	public static final int MAX_TITLE_LENGTH = 5000;
 	public static final int MAX_TITLES = 10;
+	public static final int MAX_ABSTRACTS = 10;
 	public static final int MAX_ABSTRACT_LENGTH = 150000;
+	public static final int MAX_RELATED_ABSTRACT_LENGTH = 500;
 	public static final int MAX_INSTANCES = 10;
 
 	public static String getCollectionName(String format) {