diff --git a/src/main/java/eu/dnetlib/dhp/schema/sx/scholix/ScholixIdentifier.java b/src/main/java/eu/dnetlib/dhp/schema/sx/scholix/ScholixIdentifier.java
index 2301d40..8fc8b08 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/sx/scholix/ScholixIdentifier.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/sx/scholix/ScholixIdentifier.java
@@ -2,17 +2,43 @@
 package eu.dnetlib.dhp.schema.sx.scholix;
 
 import java.io.Serializable;
+import java.util.Objects;
 
 public class ScholixIdentifier implements Serializable {
 	private String identifier;
 	private String schema;
+	private String url;
 
 	public ScholixIdentifier() {
 	}
 
-	public ScholixIdentifier(String identifier, String schema) {
+	public ScholixIdentifier(String identifier, String schema, String url) {
 		this.identifier = identifier;
 		this.schema = schema;
+		this.url = url;
+	}
+
+
+	public String getUrl() {
+		return url;
+	}
+
+	public void setUrl(String url) {
+		this.url = url;
+	}
+
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) return true;
+		if (o == null || getClass() != o.getClass()) return false;
+		ScholixIdentifier that = (ScholixIdentifier) o;
+		return identifier.equals(that.identifier) && schema.equals(that.schema);
+	}
+
+	@Override
+	public int hashCode() {
+		return Objects.hash(identifier, schema);
 	}
 
 	public String getIdentifier() {
diff --git a/src/main/java/eu/dnetlib/dhp/schema/sx/scholix/ScholixResource.java b/src/main/java/eu/dnetlib/dhp/schema/sx/scholix/ScholixResource.java
index e173e2a..569b1f3 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/sx/scholix/ScholixResource.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/sx/scholix/ScholixResource.java
@@ -2,11 +2,7 @@
 package eu.dnetlib.dhp.schema.sx.scholix;
 
 import java.io.Serializable;
-import java.util.Collections;
 import java.util.List;
-import java.util.stream.Collectors;
-
-import eu.dnetlib.dhp.schema.sx.summary.ScholixSummary;
 
 public class ScholixResource implements Serializable {
 
@@ -20,63 +16,6 @@ public class ScholixResource implements Serializable {
 	private List<ScholixEntityId> publisher;
 	private List<ScholixCollectedFrom> collectedFrom;
 
-	public static ScholixResource fromSummary(ScholixSummary summary) {
-
-		final ScholixResource resource = new ScholixResource();
-
-		resource.setDnetIdentifier(summary.getId());
-
-		resource
-			.setIdentifier(
-				summary
-					.getLocalIdentifier()
-					.stream()
-					.map(i -> new ScholixIdentifier(i.getId(), i.getType()))
-					.collect(Collectors.toList()));
-
-		resource.setObjectType(summary.getTypology().toString());
-
-		if (summary.getTitle() != null && summary.getTitle().size() > 0)
-			resource.setTitle(summary.getTitle().get(0));
-
-		if (summary.getAuthor() != null)
-			resource
-				.setCreator(
-					summary
-						.getAuthor()
-						.stream()
-						.map(c -> new ScholixEntityId(c, null))
-						.collect(Collectors.toList()));
-
-		if (summary.getDate() != null && summary.getDate().size() > 0)
-			resource.setPublicationDate(summary.getDate().get(0));
-		if (summary.getPublisher() != null)
-			resource
-				.setPublisher(
-					summary
-						.getPublisher()
-						.stream()
-						.map(p -> new ScholixEntityId(p, null))
-						.collect(Collectors.toList()));
-		if (summary.getDatasources() != null)
-			resource
-				.setCollectedFrom(
-					summary
-						.getDatasources()
-						.stream()
-						.map(
-							d -> new ScholixCollectedFrom(
-								new ScholixEntityId(
-									d.getDatasourceName(),
-									Collections
-										.singletonList(
-											new ScholixIdentifier(d.getDatasourceId(), "dnet_identifier"))),
-								"collected",
-								d.getCompletionStatus()))
-						.collect(Collectors.toList()));
-		return resource;
-	}
-
 	public List<ScholixIdentifier> getIdentifier() {
 		return identifier;
 	}
diff --git a/src/main/java/eu/dnetlib/dhp/schema/sx/summary/CollectedFromType.java b/src/main/java/eu/dnetlib/dhp/schema/sx/summary/CollectedFromType.java
index 0dae748..61df72f 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/sx/summary/CollectedFromType.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/sx/summary/CollectedFromType.java
@@ -2,6 +2,7 @@
 package eu.dnetlib.dhp.schema.sx.summary;
 
 import java.io.Serializable;
+import java.util.Objects;
 
 public class CollectedFromType implements Serializable {
 
@@ -18,6 +19,19 @@ public class CollectedFromType implements Serializable {
 		this.completionStatus = completionStatus;
 	}
 
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) return true;
+		if (o == null || getClass() != o.getClass()) return false;
+		CollectedFromType that = (CollectedFromType) o;
+		return Objects.equals(datasourceName, that.datasourceName) && Objects.equals(datasourceId, that.datasourceId);
+	}
+
+	@Override
+	public int hashCode() {
+		return Objects.hash(datasourceName, datasourceId);
+	}
+
 	public String getDatasourceName() {
 		return datasourceName;
 	}
diff --git a/src/main/java/eu/dnetlib/dhp/schema/sx/summary/ScholixSummary.java b/src/main/java/eu/dnetlib/dhp/schema/sx/summary/ScholixSummary.java
index 5894c05..8da25dc 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/sx/summary/ScholixSummary.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/sx/summary/ScholixSummary.java
@@ -6,9 +6,11 @@ import java.util.List;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import eu.dnetlib.dhp.schema.sx.scholix.ScholixIdentifier;
+
 public class ScholixSummary implements Serializable {
 	private String id;
-	private List<TypedIdentifier> localIdentifier;
+	private List<ScholixIdentifier> localIdentifier;
 	private Typology typology;
 	private String subType;
 	private List<String> title;
@@ -30,11 +32,11 @@ public class ScholixSummary implements Serializable {
 		this.id = id;
 	}
 
-	public List<TypedIdentifier> getLocalIdentifier() {
+	public List<ScholixIdentifier> getLocalIdentifier() {
 		return localIdentifier;
 	}
 
-	public void setLocalIdentifier(List<TypedIdentifier> localIdentifier) {
+	public void setLocalIdentifier(List<ScholixIdentifier> localIdentifier) {
 		this.localIdentifier = localIdentifier;
 	}
 
diff --git a/src/main/java/eu/dnetlib/dhp/schema/sx/summary/TypedIdentifier.java b/src/main/java/eu/dnetlib/dhp/schema/sx/summary/TypedIdentifier.java
deleted file mode 100644
index b66cb08..0000000
--- a/src/main/java/eu/dnetlib/dhp/schema/sx/summary/TypedIdentifier.java
+++ /dev/null
@@ -1,43 +0,0 @@
-
-package eu.dnetlib.dhp.schema.sx.summary;
-
-import java.io.Serializable;
-
-public class TypedIdentifier implements Serializable {
-	private String id;
-	private String type;
-	private String url;
-
-	public TypedIdentifier() {
-	}
-
-	public TypedIdentifier(String id, String type, String url) {
-		this.id = id;
-		this.type = type;
-		this.url = url;
-	}
-
-	public String getUrl() {
-		return url;
-	}
-
-	public void setUrl(String url) {
-		this.url = url;
-	}
-
-	public String getId() {
-		return id;
-	}
-
-	public void setId(String id) {
-		this.id = id;
-	}
-
-	public String getType() {
-		return type;
-	}
-
-	public void setType(String type) {
-		this.type = type;
-	}
-}