diff --git a/dhp-common/src/main/java/eu/dnetlib/dhp/common/MakeTarArchive.java b/dhp-common/src/main/java/eu/dnetlib/dhp/common/MakeTarArchive.java
new file mode 100644
index 0000000000..5dff1d0a8f
--- /dev/null
+++ b/dhp-common/src/main/java/eu/dnetlib/dhp/common/MakeTarArchive.java
@@ -0,0 +1,119 @@
+package eu.dnetlib.dhp.common;
+
+import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
+import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
+import org.apache.hadoop.fs.*;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Serializable;
+
+public class MakeTarArchive implements Serializable {
+
+    private static TarArchiveOutputStream getTar(FileSystem fileSystem, String outputPath) throws IOException {
+        Path hdfsWritePath = new Path(outputPath);
+        FSDataOutputStream fsDataOutputStream = null;
+        if (fileSystem.exists(hdfsWritePath)) {
+            fileSystem.delete(hdfsWritePath, true);
+
+        }
+        fsDataOutputStream = fileSystem.create(hdfsWritePath);
+
+        return new TarArchiveOutputStream(fsDataOutputStream.getWrappedStream());
+    }
+
+    private static void write(FileSystem fileSystem, String inputPath, String outputPath, String dir_name)
+            throws IOException {
+
+        Path hdfsWritePath = new Path(outputPath);
+        FSDataOutputStream fsDataOutputStream = null;
+        if (fileSystem.exists(hdfsWritePath)) {
+            fileSystem.delete(hdfsWritePath, true);
+
+        }
+        fsDataOutputStream = fileSystem.create(hdfsWritePath);
+
+        TarArchiveOutputStream ar = new TarArchiveOutputStream(fsDataOutputStream.getWrappedStream());
+
+        RemoteIterator<LocatedFileStatus> fileStatusListIterator = fileSystem
+                .listFiles(
+                        new Path(inputPath), true);
+
+        while (fileStatusListIterator.hasNext()) {
+            writeCurrentFile(fileSystem, dir_name, fileStatusListIterator, ar, 0);
+        }
+
+        ar.close();
+    }
+
+    public static void tarMaxSize(FileSystem fileSystem, String inputPath, String outputPath, String dir_name,
+                                     int gBperSplit) throws IOException {
+        final long bytesPerSplit = 1024L * 1024L * 1024L * gBperSplit;
+
+        long sourceSize = fileSystem.getContentSummary(new Path(inputPath)).getSpaceConsumed();
+
+        if (sourceSize < bytesPerSplit) {
+            write(fileSystem, inputPath, outputPath + ".tar", dir_name);
+        } else {
+            int partNum = 0;
+
+            RemoteIterator<LocatedFileStatus> fileStatusListIterator = fileSystem
+                    .listFiles(
+                            new Path(inputPath), true);
+            boolean next = fileStatusListIterator.hasNext();
+            while (next) {
+                TarArchiveOutputStream ar = getTar(fileSystem, outputPath + "_" + (partNum + 1) + ".tar");
+
+                long current_size = 0;
+                while (next && current_size < bytesPerSplit) {
+                    current_size = writeCurrentFile(fileSystem, dir_name, fileStatusListIterator, ar, current_size);
+                    next = fileStatusListIterator.hasNext();
+
+                }
+
+                partNum += 1;
+                ar.close();
+            }
+
+        }
+
+    }
+
+    private static long writeCurrentFile(FileSystem fileSystem, String dir_name,
+                                         RemoteIterator<LocatedFileStatus> fileStatusListIterator,
+                                         TarArchiveOutputStream ar, long current_size) throws IOException {
+        LocatedFileStatus fileStatus = fileStatusListIterator.next();
+
+        Path p = fileStatus.getPath();
+        String p_string = p.toString();
+        if (!p_string.endsWith("_SUCCESS")) {
+            String name = p_string.substring(p_string.lastIndexOf("/") + 1);
+            if (name.trim().equalsIgnoreCase("communities_infrastructures")) {
+                name = "communities_infrastructures.json";
+            }
+            TarArchiveEntry entry = new TarArchiveEntry(dir_name + "/" + name);
+            entry.setSize(fileStatus.getLen());
+            current_size += fileStatus.getLen();
+            ar.putArchiveEntry(entry);
+
+            InputStream is = fileSystem.open(fileStatus.getPath());
+
+            BufferedInputStream bis = new BufferedInputStream(is);
+
+            int count;
+            byte data[] = new byte[1024];
+            while ((count = bis.read(data, 0, data.length)) != -1) {
+                ar.write(data, 0, count);
+            }
+            bis.close();
+            ar.closeArchiveEntry();
+
+        }
+        return current_size;
+    }
+
+
+
+
+}
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/dump_whole/schema/community_infrastructure_schema.json b/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/dump_whole/schema/community_infrastructure_schema.json
new file mode 100644
index 0000000000..9fc338224b
--- /dev/null
+++ b/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/dump_whole/schema/community_infrastructure_schema.json
@@ -0,0 +1,38 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "type": "object",
+  "properties": {
+    "description": {
+      "type": "string",
+      "description": "Description of the research community/ research infrastructure"
+    },
+    "id": {
+      "type": "string",
+      "description": "OpenAIRE id of the research community/ research infrastructure"
+    },
+    "name": {
+      "type": "string",
+      "description": "The long name of the community"
+    },
+    "originalId": {
+      "type": "string",
+      "description": "The acronym of the community"
+    },
+    "subject": {
+      "description": "Description of subject",
+      "type": "array",
+      "items": {
+        "type": "string",
+        "description": "Only for research communities: the list of the subjects associated to the research community"
+      }
+    },
+    "type": {
+      "type": "string",
+      "description": "The type of the record (research community/research infrastructure)"
+    },
+    "zenodo_community": {
+      "type": "string",
+      "description": "The id of the Zenodo communities associated to the research community/Research infrastructure"
+    }
+  }
+}
\ No newline at end of file
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/dump_whole/schema/context_schema.json b/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/dump_whole/schema/context_schema.json
deleted file mode 100644
index ba6609a50e..0000000000
--- a/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/dump_whole/schema/context_schema.json
+++ /dev/null
@@ -1,38 +0,0 @@
-{
-  "$schema": "http://json-schema.org/draft-07/schema#",
-  "type": "object",
-  "properties": {
-    "description": {
-      "type": "string",
-      "description": "Description of description"
-    },
-    "id": {
-      "type": "string",
-      "description": "Description of id"
-    },
-    "name": {
-      "type": "string",
-      "description": "Description of name"
-    },
-    "originalId": {
-      "type": "string",
-      "description": "Description of originalId"
-    },
-    "subject": {
-      "description": "Description of subject",
-      "type": "array",
-      "items": {
-        "type": "string",
-        "description": "Description of subject"
-      }
-    },
-    "type": {
-      "type": "string",
-      "description": "Description of type"
-    },
-    "zenodo_community": {
-      "type": "string",
-      "description": "Description of zenodo_community"
-    }
-  }
-}
\ No newline at end of file