add diagram to data structures notebook

PacktPublishing · Nov 16, 2023 · ba98818 · ba98818
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diff --git a/ch3/jupyter-notebooks/data_classes.ipynb b/ch3/jupyter-notebooks/data_classes.ipynb
@@ -6,7 +6,7 @@
    "source": [
     "# Building blocks in Haystack: Data classes \n",
     "\n",
-    "With Haystack, we can leverage the following built-in data classes: \n",
+    "When building data pipelines, a core component involved is the use of data structures. With data structures, we can store, manipulate and manage data through code. Having a solid foundation for data structures is key to ease NLP pipeline development, particularly when an LLM is involved.  With Haystack, we can leverage the following built-in data classes: \n",
     "\n",
     "* Haystack Documents data class \n",
     "\n",
@@ -16,6 +16,8 @@
     "\n",
     "* Haystack StreaminhChunk data class \n",
     "\n",
+    "![](./images/data-structures.png)\n",
+    "\n",
     "Each of these classes act as data structures that can be used to store and process data. We can use these classes to store data in a standardized format, and then use the Haystack API to process the data through data pipelines.\n",
     "\n",
     "In the next section, we will provide examples of each."

diff --git a/ch3/jupyter-notebooks/images/data-structures.png b/ch3/jupyter-notebooks/images/data-structures.png