diff --git a/ccm-core/src/main/java/org/libreccm/categorization/Domain.java b/ccm-core/src/main/java/org/libreccm/categorization/Domain.java
index dcb3a5e36..4e208dd5b 100644
--- a/ccm-core/src/main/java/org/libreccm/categorization/Domain.java
+++ b/ccm-core/src/main/java/org/libreccm/categorization/Domain.java
@@ -22,7 +22,6 @@ import com.fasterxml.jackson.annotation.JsonIdentityInfo;
 import com.fasterxml.jackson.annotation.JsonIdentityReference;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.ObjectIdGenerators;
-import org.hibernate.validator.constraints.NotBlank;
 import org.hibernate.validator.constraints.URL;
 import org.libreccm.core.CcmObject;
 import org.libreccm.l10n.LocalizedString;
@@ -65,6 +64,7 @@ import javax.persistence.OneToMany;
 import javax.persistence.Table;
 import javax.persistence.Temporal;
 import javax.persistence.TemporalType;
+import javax.validation.constraints.NotBlank;
 
 /**
  * A domain is collection of categories designed a specific purpose. This entity
@@ -142,7 +142,7 @@ public class Domain extends CcmObject implements Serializable, Exportable {
     /**
      * An unique URI identifying the domain. It is not required that this domain
      * points to a real resource, it primary purpose is provide a unique
-     * identifier. for the domain. If you create your own category system you
+     * identifier for the domain. If you create your own category system you
      * should use the top level domain of your organisation. Also the URI should
      * include the domain key in lower case letters. For example if the domain
      * key is {@code EXAMPLE-NAV}, than the URI can be