Merged in task/dspace-cris-2023_02_x/DSC-1532 (pull request DSpace#5195)

[DSC-1532]: Add control field 001 to MarcXML export

Approved-by: Vincenzo Mecca

Author: Bouaka Donfack Piaget

dspace-oai/src/main/java/org/dspace/xoai/util/ItemUtils.java

@@ -355,6 +355,11 @@ public static Metadata retrieveMetadata(Context context, Item item) {
         // read all metadata into Metadata Object
         metadata = new Metadata();
 
+        // add item id
+        Element idElement = ItemUtils.create("id");
+        idElement.getField().add(createValue("value", item.getID().toString()));
+        metadata.getElement().add(idElement);
+
         List<MetadataValue> vals = itemService.getMetadata(item, Item.ANY, Item.ANY, Item.ANY, Item.ANY);
         for (MetadataValue val : vals) {
             MetadataField field = val.getMetadataField();

dspace/config/crosswalks/oai/metadataFormats/marc.xsl

@@ -12,6 +12,11 @@
 			xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 			xsi:schemaLocation="http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd">
 			<leader>00925njm 22002777a 4500</leader>
+            <xsl:for-each select="doc:metadata/doc:element[@name='id']">
+            <datafield ind2=" " ind1=" " tag="001">
+                <subfield><xsl:value-of select="." /></subfield>
+            </datafield>
+            </xsl:for-each>
 			<datafield ind2=" " ind1=" " tag="042">
 				<subfield code="a">dc</subfield>
 			</datafield>