DBRefEntry.source enum type

diff --git a/src/jalview/datamodel/DBRefSource.java b/src/jalview/datamodel/DBRefSource.java
new file mode 100755 (executable)
index 0000000..06e3b6f
--- /dev/null
+++ b/src/jalview/datamodel/DBRefSource.java
@@ -0,0 +1,29 @@
+package jalview.datamodel;
+
+public class DBRefSource
+{
+    /**
+     * UNIPROT Accession Number
+     */
+    public static String UNIPROT="UNIPROT";
+    /**
+     * UNIPROT Entry Name
+     */
+    public static String UP_NAME="UNIPROT_NAME";
+    /**
+     * PDB Entry Code
+     */
+    public static String PDB="PDB";
+    /**
+     * EMBL ID
+     */
+    public static String EMBL="EMBL";
+    /**
+     * EMBLCDS ID
+     */
+    public static String EMBLCDS="EMBLCDS";
+    /**
+     * PFAM ID
+     */
+    public static String PFAM="PFAM";
+    }