diff --git a/dlme_airflow/drivers/iiif_json_v3.py b/dlme_airflow/drivers/iiif_json_v3.py
index 73eb2cf..3b60e30 100644
--- a/dlme_airflow/drivers/iiif_json_v3.py
+++ b/dlme_airflow/drivers/iiif_json_v3.py
@@ -7,14 +7,21 @@
 from typing import Any, Optional, Generator
 from dlme_airflow.utils.partition_url_builder import PartitionBuilder
 
-container = "dataframe"
-name = "iiif_json_v3"
-version = "0.0.2"
-partition_access = True
-
 
 class IiifV3JsonSource(intake.source.base.DataSource):
-    def __init__(self, collection_url, dtype=None, metadata=None, wait=None, paging=None):
+    container = "dataframe"
+    name = "iiif_json_v3"
+    version = "0.0.2"
+    partition_access = True
+
+    def __init__(
+        self,
+        collection_url,
+        dtype=None,
+        metadata=None,
+        wait=None,
+        paging=None
+    ):
         super(IiifV3JsonSource, self).__init__(metadata=metadata)
         self.collection_url = collection_url
         self.dtype = dtype
diff --git a/dlme_airflow/utils/partition_url_builder.py b/dlme_airflow/utils/partition_url_builder.py
index afbd229..5f7af88 100644
--- a/dlme_airflow/utils/partition_url_builder.py
+++ b/dlme_airflow/utils/partition_url_builder.py
@@ -66,16 +66,11 @@ def _prefetch_page_urls(self):
         ids = []
         while True:
             api_endpoint = self.paging_config['pages_url'].format(offset,self.paging_config['limit'])
-            print(f"Fetching {api_endpoint}")
             data = self._fetch_provider_data(api_endpoint)[self.paging_config['page_data']]
             offset += self.paging_config["limit"]
             harvested = len(data)
 
-            for i in data:
-                if validators.url(i['id']):
-                    ids.append(i['id'])
-                else:
-                    ids.append(f"{self.collection_url}{i['id']}")
+            ids += self._extract_ids(data)
 
             if harvested < self.paging_config["limit"]:
                 break
@@ -90,3 +85,11 @@ def _fetch_provider_data(self, url):
         resp = requests.get(url, headers=headers)
         if resp.status_code == 200:
             return resp.json()
+
+    def _extract_ids(self, data):
+        return [self._format_id(i['id']) for i in data]
+
+    def _format_id(self, id):
+        if validators.url(id):
+            return id
+        return f"{self.collection_url}{id}"