Theodore Chang · Theodore Chang · Theodore Chang
--- a/docs/howto/customization/hdf5.md
+++ b/docs/howto/customization/hdf5.md
 serialized['data']['value']
 # '/uploads/test_upload/archive/test_entry#/data/value'
 deserialized = archive.m_from_dict(serialized, m_context=archive.m_context)
-deserialized.data.value
+with deserialized.data.value as dataset:
--- a/nomad/datamodel/hdf5.py
+++ b/nomad/datamodel/hdf5.py
+    def __init__(self, file: str, path: str):
+        self.file: str = file
+        self.path: str = path
+        self.handler: h5py.File | None = None
+
+    def __enter__(self):
+        self._close()
+        self.handler = h5py.File(self.file, 'a')
+        return self.handler[self.path]
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self._close()
+
+    def _close(self):
+        if self.handler:
+            self.handler.close()
--- a/nomad/datamodel/hdf5.py
+++ b/nomad/datamodel/hdf5.py
    return match.groupdict()


+class HDF5Wrapper: