feathr-ai · xiaoyongzhu · Aug 16, 2022 · Aug 10, 2022 · Aug 10, 2022 · Aug 11, 2022
diff --git a/docs/dev_guide/feathr-core-code-structure.md b/docs/dev_guide/feathr-core-code-structure.md
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+---
+layout: default
+title: Documentation Guideline
+parent: Developer Guides
+---
+
+# Feathr Code Structure
+
+
+## Code Structure for get_offline_features() and materialize_features() API calls
+
+Credit goes to https://github.com/csruiliu for creating those diagrams below:
+
+### Feathr get_offline_features() diagram
+
+![Feathr get_offline_features() diagram](../images/feathr-get-offline-features-flow.png)
+
+### Feathr materialize_features() diagram
+
+![Feathr materialize_features() diagram](../images/feathr-feature-materliazation-flow.png)
diff --git a/docs/images/feathr-feature-materliazation-flow.png b/docs/images/feathr-feature-materliazation-flow.png
diff --git a/docs/images/feathr-get-offline-features-flow.png b/docs/images/feathr-get-offline-features-flow.png