diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/client/ResourceRegistryClientImpl.java b/src/main/java/org/gcube/informationsystem/resourceregistry/client/ResourceRegistryClientImpl.java
index 7fb439d..2de849d 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/client/ResourceRegistryClientImpl.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/client/ResourceRegistryClientImpl.java
@@ -36,6 +36,7 @@ import org.gcube.informationsystem.resourceregistry.api.exceptions.contexts.Cont
 import org.gcube.informationsystem.resourceregistry.api.exceptions.queries.InvalidQueryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.queries.templates.QueryTemplateNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.types.SchemaNotFoundException;
+import org.gcube.informationsystem.resourceregistry.api.request.BaseRequestInfo;
 import org.gcube.informationsystem.resourceregistry.api.rest.AccessPath;
 import org.gcube.informationsystem.resourceregistry.api.rest.ContextPath;
 import org.gcube.informationsystem.resourceregistry.api.rest.InstancePath;
@@ -52,7 +53,7 @@ import org.slf4j.LoggerFactory;
 /**
  * @author Luca Frosini (ISTI - CNR)
  */
-public class ResourceRegistryClientImpl implements ResourceRegistryClient {
+public class ResourceRegistryClientImpl extends BaseRequestInfo implements ResourceRegistryClient {
 	
 	private static final Logger logger = LoggerFactory.getLogger(ResourceRegistryClientImpl.class);
 	
@@ -63,39 +64,8 @@ public class ResourceRegistryClientImpl implements ResourceRegistryClient {
 	
 	protected Map<String, String> headers;
 	
-	/**
-	 * Track if the client must request the hierarchicalMode 
-	 */
-	protected boolean hierarchicalMode;
-	
-	/**
-	 * Track if the client must request to include contexts
-	 */
-	protected boolean includeContexts;
-	
-	/**
-	 * Track if the client must request to include {@link Metadata} 
-	 */
-	protected boolean includeMeta;
-	
-	/**
-	 * Track if the client must request to include {@link Metadata} in all
-	 * {@link IdentifiableElement} or just in the root instance 
-	 */
-	protected boolean allMeta;
-	
 	protected ContextCache contextCache;
 	
-	@Override
-	public boolean isHierarchicalMode() {
-		return hierarchicalMode;
-	}
-	
-	@Override
-	public void setHierarchicalMode(boolean hierarchicalMode) {
-		this.hierarchicalMode = hierarchicalMode;
-	}
-	
 	@Deprecated
 	@Override
 	public boolean isIncludeContextsInHeader() {
@@ -108,33 +78,6 @@ public class ResourceRegistryClientImpl implements ResourceRegistryClient {
 		setIncludeContexts(includeContexts);
 	}
 	
-	@Override
-	public boolean includeContexts() {
-		return includeContexts;
-	}
-	
-	@Override
-	public void setIncludeContexts(boolean includeContexts) {
-		this.includeContexts = includeContexts;
-	}
-
-	public boolean includeMeta() {
-		return includeMeta;
-	}
-
-	public void setIncludeMeta(boolean includeMeta) {
-		this.includeMeta = includeMeta;
-	}
-
-	public boolean allMeta() {
-		return allMeta;
-	}
-
-	public void setAllMeta(boolean allMeta) {
-		this.allMeta = allMeta;
-	}
-	
-	
 	private void addOptionalQueryParameters(Map<String,String> queryParams) throws UnsupportedEncodingException {
 		addHierarchicalMode(queryParams);
 		addIncludeContexts(queryParams);
@@ -207,11 +150,8 @@ public class ResourceRegistryClientImpl implements ResourceRegistryClient {
 	}
 	
 	public ResourceRegistryClientImpl(String address, boolean sharedContextCache) {
+		super();
 		this.address = address;
-		this.hierarchicalMode = false;
-		this.includeContexts = false;
-		this.includeMeta = false;
-		this.allMeta = false;
 		this.headers = new HashMap<>();
 		if(sharedContextCache) {
 			contextCache = ContextCache.getInstance();