diff --git a/pom.xml b/pom.xml
index 4e02aa3..83da09c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,6 +31,7 @@
 	</dependencyManagement>
 
 	<dependencies>
+		
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-api</artifactId>
diff --git a/src/main/java/org/gcube/accounting/analytics/Filter.java b/src/main/java/org/gcube/accounting/analytics/Filter.java
new file mode 100644
index 0000000..bfdf751
--- /dev/null
+++ b/src/main/java/org/gcube/accounting/analytics/Filter.java
@@ -0,0 +1,12 @@
+/**
+ * 
+ */
+package org.gcube.accounting.analytics;
+
+/**
+ * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
+ *
+ */
+public class Filter {
+
+}
diff --git a/src/main/java/org/gcube/accounting/analytics/Info.java b/src/main/java/org/gcube/accounting/analytics/Info.java
new file mode 100644
index 0000000..be362d3
--- /dev/null
+++ b/src/main/java/org/gcube/accounting/analytics/Info.java
@@ -0,0 +1,20 @@
+/**
+ * 
+ */
+package org.gcube.accounting.analytics;
+
+/**
+ * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
+ *
+ */
+public interface Info {
+
+	public long getData();
+	
+	public Number getInfo();
+	
+	public String getUnity(); // Number of Occurrences, Kb, 
+	
+	public String getUnityDescription(); // Total Kb accumulated, Single Operation Kb
+	
+}
diff --git a/src/main/java/org/gcube/accounting/analytics/ResourceRecordQuery.java b/src/main/java/org/gcube/accounting/analytics/ResourceRecordQuery.java
new file mode 100644
index 0000000..aeb4f29
--- /dev/null
+++ b/src/main/java/org/gcube/accounting/analytics/ResourceRecordQuery.java
@@ -0,0 +1,27 @@
+/**
+ * 
+ */
+package org.gcube.accounting.analytics;
+
+import java.util.List;
+
+import org.gcube.accounting.analytics.persistence.AccountingPersistenceQuery;
+import org.gcube.accounting.datamodel.UsageRecord;
+
+/**
+ * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
+ */
+public class ResourceRecordQuery {
+
+	protected AccountingPersistenceQuery accountingPersistenceQuery;
+	
+	protected ResourceRecordQuery(AccountingPersistenceQuery accountingPersistenceQuery){
+		this.accountingPersistenceQuery = accountingPersistenceQuery;
+	}
+	
+	public List<Info> getInfo(Class<? extends UsageRecord> usageRecordType, 
+			TemporalConstraint temporalConstraint, List<Filter> filters){
+		return null;
+	}
+	
+}
diff --git a/src/main/java/org/gcube/accounting/analytics/ResourceRecordQueryFactory.java b/src/main/java/org/gcube/accounting/analytics/ResourceRecordQueryFactory.java
new file mode 100644
index 0000000..66ac5fe
--- /dev/null
+++ b/src/main/java/org/gcube/accounting/analytics/ResourceRecordQueryFactory.java
@@ -0,0 +1,78 @@
+/**
+ * 
+ */
+package org.gcube.accounting.analytics;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.ServiceLoader;
+
+import org.gcube.accounting.analytics.exception.NoAvailableScopeException;
+import org.gcube.accounting.analytics.exception.NoUsableAccountingPersistenceQueryFound;
+import org.gcube.accounting.analytics.persistence.AccountingPersistenceQuery;
+import org.gcube.common.scope.api.ScopeProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
+ */
+public abstract class ResourceRecordQueryFactory {
+
+	private static Logger logger = LoggerFactory.getLogger(ResourceRecordQueryFactory.class);
+	
+	private static Map<String, ResourceRecordQuery> resourceRecordQueries;
+	
+	static {
+		resourceRecordQueries = new HashMap<String, ResourceRecordQuery>();
+	}
+	
+	public synchronized static ResourceRecordQuery getInstance() throws NoAvailableScopeException, NoUsableAccountingPersistenceQueryFound {
+		String scope = ScopeProvider.instance.get();
+		if(scope==null){
+			new NoAvailableScopeException();
+		}
+		
+		ResourceRecordQuery resourceRecordQuery = resourceRecordQueries.get(scope);
+		if(resourceRecordQuery==null){
+		
+			try {
+				ServiceLoader<AccountingPersistenceQuery> serviceLoader = ServiceLoader.load(AccountingPersistenceQuery.class);
+				for (AccountingPersistenceQuery found : serviceLoader) {
+					try {
+						String foundClassName = found.getClass().getSimpleName();
+						logger.debug("Testing {}", foundClassName);
+						
+						//AccountingPersistenceQueryConfiguration configuration = AccountingPersistenceQueryConfiguration.getConfiguration(foundClassName);
+						//found.prepareConnection(configuration);
+
+						resourceRecordQuery = new ResourceRecordQuery(found);
+						
+						break;
+					} catch (Exception e) {
+						logger.debug(String.format("%s not initialized correctly. It will not be used", found.getClass().getSimpleName()));
+					}
+				}
+			} catch(Exception e){
+				throw new NoUsableAccountingPersistenceQueryFound();
+			}
+			
+			if(resourceRecordQuery==null){
+				throw new NoUsableAccountingPersistenceQueryFound();
+			}
+			
+			resourceRecordQueries.put(scope, resourceRecordQuery);
+		}
+		
+		return resourceRecordQuery;
+	}
+
+	
+	protected ResourceRecordQueryFactory(){
+		
+	}
+
+	
+	
+	
+}
diff --git a/src/main/java/org/gcube/accounting/analytics/TemporalConstraint.java b/src/main/java/org/gcube/accounting/analytics/TemporalConstraint.java
new file mode 100644
index 0000000..14df9a7
--- /dev/null
+++ b/src/main/java/org/gcube/accounting/analytics/TemporalConstraint.java
@@ -0,0 +1,12 @@
+/**
+ * 
+ */
+package org.gcube.accounting.analytics;
+
+/**
+ * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
+ *
+ */
+public interface TemporalConstraint {
+
+}
diff --git a/src/main/java/org/gcube/accounting/analytics/exception/NoAvailableScopeException.java b/src/main/java/org/gcube/accounting/analytics/exception/NoAvailableScopeException.java
new file mode 100644
index 0000000..129344a
--- /dev/null
+++ b/src/main/java/org/gcube/accounting/analytics/exception/NoAvailableScopeException.java
@@ -0,0 +1,32 @@
+/**
+ * 
+ */
+package org.gcube.accounting.analytics.exception;
+
+/**
+ * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
+ *
+ */
+public class NoAvailableScopeException extends Exception {
+
+	/**
+	 * Generated serial Version UID
+	 */
+	private static final long serialVersionUID = -327144230654860518L;
+
+	public NoAvailableScopeException() {
+		super();
+	}
+
+	public NoAvailableScopeException(String message) {
+		super(message);
+	}
+	
+	public NoAvailableScopeException(Throwable cause) {
+		super(cause);
+	}
+	
+	public NoAvailableScopeException(String message, Throwable cause) {
+		super(message, cause);
+	}
+}
diff --git a/src/main/java/org/gcube/accounting/analytics/exception/NoUsableAccountingPersistenceQueryFound.java b/src/main/java/org/gcube/accounting/analytics/exception/NoUsableAccountingPersistenceQueryFound.java
new file mode 100644
index 0000000..1a37fb6
--- /dev/null
+++ b/src/main/java/org/gcube/accounting/analytics/exception/NoUsableAccountingPersistenceQueryFound.java
@@ -0,0 +1,32 @@
+/**
+ * 
+ */
+package org.gcube.accounting.analytics.exception;
+
+/**
+ * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
+ *
+ */
+public class NoUsableAccountingPersistenceQueryFound extends Exception {
+
+	/**
+	 * Generated serial Version UID
+	 */
+	private static final long serialVersionUID = -327144230654860518L;
+
+	public NoUsableAccountingPersistenceQueryFound() {
+		super();
+	}
+
+	public NoUsableAccountingPersistenceQueryFound(String message) {
+		super(message);
+	}
+	
+	public NoUsableAccountingPersistenceQueryFound(Throwable cause) {
+		super(cause);
+	}
+	
+	public NoUsableAccountingPersistenceQueryFound(String message, Throwable cause) {
+		super(message, cause);
+	}
+}
diff --git a/src/main/java/org/gcube/accounting/analytics/persistence/AccountingPersistenceQuery.java b/src/main/java/org/gcube/accounting/analytics/persistence/AccountingPersistenceQuery.java
new file mode 100644
index 0000000..2921ca0
--- /dev/null
+++ b/src/main/java/org/gcube/accounting/analytics/persistence/AccountingPersistenceQuery.java
@@ -0,0 +1,12 @@
+/**
+ * 
+ */
+package org.gcube.accounting.analytics.persistence;
+
+/**
+ * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
+ *
+ */
+public class AccountingPersistenceQuery {
+
+}