diff --git a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/transformation/xslt/DataFetcher.java b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/transformation/xslt/DataFetcher.java
index 2197908e9..ef5269927 100644
--- a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/transformation/xslt/DataFetcher.java
+++ b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/transformation/xslt/DataFetcher.java
@@ -1,18 +1,11 @@
 package eu.dnetlib.dhp.transformation.xslt;
-
-import com.mongodb.util.JSON;
 import org.apache.commons.io.IOUtils;
 import org.json.JSONObject;
-import scala.Char;
-
 import java.io.IOException;
 import java.net.URL;
-import java.nio.charset.Charset;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
-
 /**
  * This class fetches JSON from a provided link and returns
  * a Dublin Core. This functionality is particularly needed for OSF Preprints
@@ -21,8 +14,26 @@ import java.util.List;
 /**
  * this method fetches JSON from a provided URL and returns it as JSON Object
  */
+
+
 public class DataFetcher {
-    // fetch data
+
+    /**
+     * this method fetches JSON from a provided URL and returns it as Dublin Core
+     */
+    public static List<String> fetchAndTransform(URL url) throws IOException {
+
+        JSONObject jsonObject = getJson(url);
+        List<String> authors = getAuthorsFromJson(jsonObject);
+        return transformListToDublinCore(authors);
+    }
+
+    /**
+     * This method fetches JSON object from a given URL
+     * @param url
+     * @return
+     * @throws IOException
+     */
     static JSONObject getJson(URL url) throws IOException {
 
         String json = IOUtils.toString(url);
@@ -36,12 +47,9 @@ public class DataFetcher {
      * @return
      */
     static List<String> getAuthorsFromJson(JSONObject jsonObject) {
-
         List<String> authors = new ArrayList<>();
-
         // count of authors
         int countOfAuthors = jsonObject.getJSONArray("data").length();
-
         for (int i = 0; i < countOfAuthors; i++) {
 
             authors.add(jsonObject
@@ -52,12 +60,15 @@ public class DataFetcher {
                     .getJSONObject("data")
                     .getJSONObject("attributes")
                     .getString("full_name"));
-
         }
         return authors;
     }
 
-    // transform list of authors into Dublin Core
+    /**
+     * This method transforms list of authors into Dublin Core
+     * @param authors
+     * @return Dublin Core list of authors
+     */
     static List<String> transformListToDublinCore(List<String> authors) {
 
         List<String> dublinCoreAuthors = new ArrayList<>();
@@ -73,7 +84,6 @@ public class DataFetcher {
 
             dublinCoreAuthors.add(
                     "<dc:creator>" + lastName + ", " + initialOfFirstName +  ". (" + firstName + ")" + "</dc:creator>");
-
         }
         return dublinCoreAuthors;
     }
diff --git a/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/transformation/xslt/DataFetcherTest.java b/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/transformation/xslt/DataFetcherTest.java
index 03382328d..95fef81de 100644
--- a/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/transformation/xslt/DataFetcherTest.java
+++ b/dhp-workflows/dhp-aggregation/src/test/java/eu/dnetlib/dhp/transformation/xslt/DataFetcherTest.java
@@ -5,7 +5,6 @@ import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-import javax.xml.crypto.Data;
 import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -48,7 +47,6 @@ class DataFetcherTest {
         JSONObject testJsonObj = DataFetcher.getJson(contributorsUrl);
         List<String> authors = DataFetcher.getAuthorsFromJson(testJsonObj);
         System.out.println(authors);
-
         System.out.println(DataFetcher.transformListToDublinCore(authors));
 
     }