WIP: pruning out non necessary fields from the internal model

src/main/java/eu/dnetlib/dhp/schema/oaf/Measure.java

@@ -17,10 +17,10 @@ public class Measure implements Serializable {
 	private String id;
 
 	/**
-	 * List of units associated with this measure. KeyValue provides a pair to store the label (key) and the value, plus
+	 * List of units associated with this measure. MeasureUnit provides a pair to store the label (key) and the value, plus
 	 * common provenance information.
 	 */
-	private List<KeyValue> unit;
+	private List<MeasureUnit> unit;
 
 	public String getId() {
 		return id;
@@ -30,18 +30,14 @@ public class Measure implements Serializable {
 		this.id = id;
 	}
 
-	public List<KeyValue> getUnit() {
+	public List<MeasureUnit> getUnit() {
 		return unit;
 	}
 
-	public void setUnit(List<KeyValue> unit) {
+	public void setUnit(List<MeasureUnit> unit) {
 		this.unit = unit;
 	}
 
-	public void mergeFrom(Measure m) {
-		// TODO
-	}
-
 	@Override
 	public boolean equals(Object o) {
 		if (this == o)

src/main/java/eu/dnetlib/dhp/schema/oaf/MeasureUnit.java

@@ -0,0 +1,14 @@
+package eu.dnetlib.dhp.schema.oaf;
+
+public class MeasureUnit extends KeyValue {
+
+    private DataInfo dataInfo;
+
+    public DataInfo getDataInfo() {
+        return dataInfo;
+    }
+
+    public void setDataInfo(DataInfo dataInfo) {
+        this.dataInfo = dataInfo;
+    }
+}

src/main/java/eu/dnetlib/dhp/schema/oaf/Relation.java

@@ -51,7 +51,7 @@ public class Relation extends Oaf implements Serializable {
 	private String validationDate;
 
 	private List<Provenance> provenance;
-	
+
 	/**
 	 * List of relation specific properties. Values include 'similarityLevel', indicating the similarity score between a
 	 * pair of publications.

src/test/java/eu/dnetlib/dhp/schema/oaf/MeasureTest.java

@@ -47,8 +47,8 @@ class MeasureTest {
 		Assertions.assertNotNull(mm);
 	}
 
-	private KeyValue unit(String key, String value) {
-		KeyValue unit = new KeyValue();
+	private MeasureUnit unit(String key, String value) {
+		MeasureUnit unit = new MeasureUnit();
 		unit.setKey(key);
 		unit.setValue(value);
 		return unit;