diff --git a/src/main/java/io/bioimage/modelrunner/bioimageio/BioimageioRepo.java b/src/main/java/io/bioimage/modelrunner/bioimageio/BioimageioRepo.java
index 127d7647..eb7dd35f 100644
--- a/src/main/java/io/bioimage/modelrunner/bioimageio/BioimageioRepo.java
+++ b/src/main/java/io/bioimage/modelrunner/bioimageio/BioimageioRepo.java
@@ -51,6 +51,7 @@
 import io.bioimage.modelrunner.bioimageio.description.ModelDescriptorFactory;
 import io.bioimage.modelrunner.bioimageio.download.DownloadModel;
 import io.bioimage.modelrunner.bioimageio.download.DownloadTracker;
+import io.bioimage.modelrunner.utils.Constants;
 import io.bioimage.modelrunner.utils.Log;
 
 /**
@@ -652,12 +653,18 @@ public String getModelRdfUrl(String id, String version) {
 		
 		if (modelsInfo.get(id) == null)
 			return null;
+		String rdfURL;
 		if (version == null) {
-			return modelsInfo.get(id).values().stream()
+			rdfURL = modelsInfo.get(id).values().stream()
 					.filter(val -> val.get("latest").equals("true")).findFirst().get().get("source");
+		} else if (version != null && modelsInfo.get(id).get(version) != null) {
+			rdfURL = modelsInfo.get(id).get(version).get("source");
+		} else {
+			return null;
 		}
+		if (rdfURL == null) return null;
 		
-		return modelsInfo.get(id).get(version).get("source");
+		return rdfURL.substring(0, rdfURL.length() - Constants.RDF_FNAME.length());
 	}
 	
 	
diff --git a/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptor.java b/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptor.java
index 308a6527..c7de0e5c 100644
--- a/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptor.java
+++ b/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptor.java
@@ -65,11 +65,6 @@ public interface ModelDescriptor {
      */
     public String getName();
 
-    /**
-     * @return The nickname of this model.
-     */
-    public String getNickname();
-
     /**
      * @return The ID of this model.
      */
@@ -205,11 +200,6 @@ public static TensorSpec findTensorInList(String name, List<TensorSpec> tts)
 	 */
 	public Map<String, Object> getAttachments();
 
-	/**
-	 * @return the download_url
-	 */
-	public String getDownloadUrl();
-
 	/**
 	 * @return the rdf_source
 	 */
diff --git a/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptorV04.java b/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptorV04.java
index d8996ae8..8be4a9eb 100644
--- a/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptorV04.java
+++ b/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptorV04.java
@@ -30,14 +30,10 @@
 import java.util.Set;
 import java.util.stream.Collectors;
 
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonParser;
-
 import io.bioimage.modelrunner.bioimageio.BioimageioRepo;
 import io.bioimage.modelrunner.bioimageio.description.exceptions.ModelSpecsException;
 import io.bioimage.modelrunner.bioimageio.description.weights.ModelWeight;
-import io.bioimage.modelrunner.utils.Log;
+import io.bioimage.modelrunner.utils.Constants;
 
 
 /**
@@ -80,6 +76,8 @@ public class ModelDescriptorV04 implements ModelDescriptor
     private String modelID;
     private String localModelPath;
     private boolean supportBioengine = false;
+    
+    private static BioimageioRepo BMZ_REPO;
 
     private ModelDescriptorV04()
     {
@@ -700,20 +698,6 @@ public Map<String, Object> getAttachments() {
 		return attachments;
 	}
 
-	/**
-	 * @return the download_url
-	 */
-	public String getDownloadUrl() {
-		return download_url;
-	}
-
-	/**
-	 * @return the rdf_source
-	 */
-	public String getRDFSource() {
-		return rdf_source;
-	}
-
 	/**
 	 * @return the version
 	 */
@@ -818,26 +802,20 @@ public void addModelPath(Path modelBasePath) {
 		// TODO Auto-generated method stub
 		
 	}
-	
-	private void findDownloadURL() {
-		String text = BioimageioRepo.getJSONFromUrl(BioimageioRepo.location);
-		if (text == null) {
-			return;
-		}
-		JsonObject json = null;
-		try {
-			json = (JsonObject) JsonParser.parseString(text);
-			List<JsonElement> entries = json.get("entries").getAsJsonArray().asList();
-			entries.stream()
-		} catch (Exception ex) {
-			return;
-		}
-	}
 
 	@Override
 	public String getModelURL() {
+		if (this.download_url == null && BMZ_REPO == null) {
+			BMZ_REPO = BioimageioRepo.connect();
+		}
+		
 		if (this.download_url == null)
-			findDownloadURL();
-		return download_url;
+			this.download_url = BMZ_REPO.getModelRdfUrl(modelID, version);
+		return this.download_url;
+	}
+
+	@Override
+	public String getRDFSource() {
+		return getModelURL() + Constants.RDF_FNAME;
 	}
 }
diff --git a/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptorV05.java b/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptorV05.java
index f5952e68..baebb5dd 100644
--- a/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptorV05.java
+++ b/src/main/java/io/bioimage/modelrunner/bioimageio/description/ModelDescriptorV05.java
@@ -31,6 +31,7 @@
 import io.bioimage.modelrunner.bioimageio.BioimageioRepo;
 import io.bioimage.modelrunner.bioimageio.description.exceptions.ModelSpecsException;
 import io.bioimage.modelrunner.bioimageio.description.weights.ModelWeight;
+import io.bioimage.modelrunner.utils.Constants;
 
 
 /**
@@ -44,9 +45,11 @@ public class ModelDescriptorV05 implements ModelDescriptor
 {
     private String format_version;
     private String name;
+    private String download_url;
     private String timestamp;
     private String description;
     private String type;
+    private String git_repo;
     private List<Author> authors;
     private List<Author> maintainers;
     private List<Author> packaged_by;
@@ -69,6 +72,8 @@ public class ModelDescriptorV05 implements ModelDescriptor
     private String localModelPath;
     private boolean supportBioengine = false;
 	private  Map<String, Object> yamlElements;
+	
+	private static BioimageioRepo BMZ_REPO;
 
 	protected ModelDescriptorV05(Map<String, Object> yamlElements) throws ModelSpecsException
     {
@@ -137,6 +142,9 @@ protected void buildModelDescription() throws ModelSpecsException
                     case "documentation":
                         documentation = (String) fieldElement;
                         break;
+                    case "git_repo":
+                    	git_repo = (String) fieldElement;
+                        break;
                     case "type":
                         type = (String) fieldElement;
                         break;
@@ -638,45 +646,35 @@ public String buildInfo() {
 		return null;
 	}
 
-	@Override
-	public String getNickname() {
-		// TODO Auto-generated method stub
-		return null;
-	}
-
 	@Override
 	public String getGitRepo() {
-		// TODO Auto-generated method stub
-		return null;
+		return this.git_repo;
 	}
 
 	@Override
 	public List<Badge> getBadges() {
-		// TODO Auto-generated method stub
-		return null;
-	}
-
-	@Override
-	public String getDownloadUrl() {
-		// TODO Auto-generated method stub
-		return null;
+		return new ArrayList<Badge>();
 	}
 
 	@Override
-	public String getRDFSource() {
+	public void addModelPath(Path modelBasePath) {
 		// TODO Auto-generated method stub
-		return null;
+		
 	}
 
 	@Override
-	public void addModelPath(Path modelBasePath) {
-		// TODO Auto-generated method stub
+	public String getModelURL() {
+		if (this.download_url == null && BMZ_REPO == null) {
+			BMZ_REPO = BioimageioRepo.connect();
+		}
 		
+		if (this.download_url == null)
+			this.download_url = BMZ_REPO.getModelRdfUrl(modelID, version);
+		return this.download_url;
 	}
 
 	@Override
-	public String getModelURL() {
-		// TODO Auto-generated method stub
-		return null;
+	public String getRDFSource() {
+		return getModelURL() + Constants.RDF_FNAME;
 	}
 }