Add datasets with data URL to category tree only

convert.py

@@ -378,12 +378,6 @@ def toc_element_to_category_tree(xml_element, dataset_json_stubs, dataset_codes_
             )
         )
     elif xml_element_tag == "branch":
-        code = xml_element.findtext("{*}code")
-        if code == "DS-1062396":
-            # Remove "International trade in goods - detailed data" branch from category tree
-            # as it doesn't contains any data here.
-            # https://git.nomics.world/dbnomics-fetchers/management/issues/435
-            return None
         children = list(
             filter(
                 None,
@@ -396,7 +390,7 @@ def toc_element_to_category_tree(xml_element, dataset_json_stubs, dataset_codes_
         return (
             without_falsy_values(
                 {
-                    "code": code,
+                    "code": xml_element.findtext("{*}code"),
                     "name": xml_element.findtext("{*}title[@language='en']"),
                     "children": children,
                 }
@@ -412,6 +406,10 @@ def toc_element_to_category_tree(xml_element, dataset_json_stubs, dataset_codes_
         if dataset_code not in dataset_codes_to_convert:
             return None
 
+        dataset_url = xml_element.findtext("{*}downloadLink[@format='sdmx']")
+        if not dataset_url:
+            return None
+
         dataset_name = xml_element.findtext("{*}title[@language='en']")
         if dataset_code not in dataset_json_stubs:
             dataset_json_stubs[dataset_code] = {