chore: import upstream snapshot with attribution

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+.. _guide-data-pipeline:
+
+Chapter 4: Graph Data Pipeline
+==============================
+
+:ref:`(中文版) <guide_cn-data-pipeline>`
+
+DGL implements many commonly used graph datasets in :ref:`apidata`. They
+follow a standard pipeline defined in class :class:`dgl.data.DGLDataset`. DGL highly
+recommends processing graph data into a :class:`dgl.data.DGLDataset` subclass, as the
+pipeline provides simple and clean solution for loading, processing and
+saving graph data.
+
+Roadmap
+-------
+
+This chapter introduces how to create a custom DGL-Dataset.
+The following sections explain how the pipeline works, and
+shows how to implement each component of it.
+
+* :ref:`guide-data-pipeline-dataset`
+* :ref:`guide-data-pipeline-download`
+* :ref:`guide-data-pipeline-process`
+* :ref:`guide-data-pipeline-savenload`
+* :ref:`guide-data-pipeline-loadogb`
+* :ref:`guide-data-pipeline-loadcsv`
+
+.. toctree::
+    :maxdepth: 1
+    :hidden:
+    :glob:
+
+    data-dataset
+    data-download
+    data-process
+    data-savenload
+    data-loadogb
+    data-loadcsv