diff --git a/docs/assets/img/sdg.png b/docs/assets/img/sdg.png
new file mode 100644
index 0000000..e58fc48
Binary files /dev/null and b/docs/assets/img/sdg.png differ
diff --git a/docs/data-model/entities/research-product.md b/docs/data-model/entities/research-product.md
index 0e10ad6..e4ea74c 100644
--- a/docs/data-model/entities/research-product.md
+++ b/docs/data-model/entities/research-product.md
@@ -331,20 +331,40 @@ _Type: [Subject](other#subject) • Cardinality: MANY_
 
 Subject, keyword, classification code, or key phrase describing the resource.
 
-OpenAIRE classifies research products according to the [Field of Science](../../graph-production-workflow/enrichment-by-pid/fos-classification) 
-and [Sustainable Development Goals](../../graph-production-workflow/enrichment-by-pid/sdg-classification) taxonomies. 
+OpenAIRE classifies research products according to the [Field of Science](../../graph-production-workflow/indicators-ingestion/fos-classification.md) 
+and [Sustainable Development Goals](../../graph-production-workflow/indicators-ingestion/sdg-classification.md) taxonomies. 
 Check out the relative sections to know more.
 
 ```json
 "subjects": [
     {
-        "provenance": {
-            "provenance": "Harvested",
-            "trust": "0.9"
+        "subject": {
+            "scheme": "FOS",
+            "value": "01 natural sciences"
         },
+        "provenance": {
+            "provenance": "inferred by OpenAIRE",
+            "trust": "0.85"
+        }
+    },
+    {
+        "subject": {
+            "scheme": "SDG",
+            "value": "2. Zero hunger"
+        },
+        "provenance": {
+            "provenance": "inferred by OpenAIRE",
+            "trust": "0.83"
+        }
+    },
+    {
         "subject": {
             "scheme": "keyword",
             "value": "Open science"
+        },
+        "provenance": {
+            "provenance": "Harvested",
+            "trust": "0.9"
         }
     },
     ...
diff --git a/docs/graph-production-workflow/enrichment-by-pid/sdg-classification.md b/docs/graph-production-workflow/enrichment-by-pid/sdg-classification.md
deleted file mode 100644
index 1d59ff9..0000000
--- a/docs/graph-production-workflow/enrichment-by-pid/sdg-classification.md
+++ /dev/null
@@ -1 +0,0 @@
-# Sustainable Development Goal
\ No newline at end of file
diff --git a/docs/graph-production-workflow/enrichment-by-pid/fos-classification.md b/docs/graph-production-workflow/indicators-ingestion/fos-classification.md
similarity index 100%
rename from docs/graph-production-workflow/enrichment-by-pid/fos-classification.md
rename to docs/graph-production-workflow/indicators-ingestion/fos-classification.md
diff --git a/docs/graph-production-workflow/indicators-ingestion/sdg-classification.md b/docs/graph-production-workflow/indicators-ingestion/sdg-classification.md
new file mode 100644
index 0000000..6e113d3
--- /dev/null
+++ b/docs/graph-production-workflow/indicators-ingestion/sdg-classification.md
@@ -0,0 +1,76 @@
+# Sustainable Development Goals
+
+## Introduction
+The Sustainable Development Goals (SDGs) are a set of 17 interconnected global goals established by the United 
+Nations in 2015. 
+They serve as a universal call to action to end poverty, protect the planet, and ensure peace and prosperity for 
+all by 2030. 
+The SDGs are designed to be a blueprint for achieving a better and more sustainable future.
+
+<p align="center">
+    <img loading="lazy" alt="Data model" src={require('../../assets/img/sdg.png').default} width="100%" 
+className="img_node_modules-@docusaurus-theme-classic-lib-theme-MDXComponents-Img-styles-module"/>
+</p>
+
+## The 17 Sustainable Development Goals
+
+1. [**No Poverty**](https://sdgs.un.org/goals/goal1): End poverty in all its forms everywhere.
+2. [**Zero Hunger**](https://sdgs.un.org/goals/goal2): End hunger, achieve food security and improved nutrition, and 
+   promote sustainable agriculture.
+3. [**Good Health and Well-being**](https://sdgs.un.org/goals/goal3): Ensure healthy lives and promote well-being 
+   for all at all ages.
+4. [**Quality Education**](https://sdgs.un.org/goals/goal4): Ensure inclusive and equitable quality education and 
+   promote lifelong learning opportunities for all.
+5. [**Gender Equality**](https://sdgs.un.org/goals/goal5): Achieve gender equality and empower all women and girls.
+6. [**Clean Water and Sanitation**](https://sdgs.un.org/goals/goal6): Ensure availability and sustainable 
+   management of water and sanitation for all.
+7. [**Affordable and Clean Energy**](https://sdgs.un.org/goals/goal7): Ensure access to affordable, reliable, 
+   sustainable, and modern energy for all.
+8. [**Decent Work and Economic Growth**](https://sdgs.un.org/goals/goal8): Promote sustained, inclusive, and 
+   sustainable economic growth, full and productive employment, and decent work for all.
+9. [**Industry, Innovation, and Infrastructure**](https://sdgs.un.org/goals/goal9): Build resilient infrastructure, 
+   promote inclusive and sustainable industrialization, and foster innovation.
+10. [**Reduced Inequalities**](https://sdgs.un.org/goals/goal10): Reduce inequality within and among countries.
+11. [**Sustainable Cities and Communities**](https://sdgs.un.org/goals/goal11): Make cities and human settlements 
+    inclusive, safe, resilient, and sustainable.
+12. [**Responsible Consumption and Production**](https://sdgs.un.org/goals/goal12): Ensure sustainable consumption 
+    and production patterns.
+13. [**Climate Action**](https://sdgs.un.org/goals/goal13): Take urgent action to combat climate change and its impacts.
+14. [**Life Below Water**](https://sdgs.un.org/goals/goal14): Conserve and sustainably use the oceans, seas, and 
+    marine resources for sustainable development.
+15. [**Life on Land**](https://sdgs.un.org/goals/goal15): Protect, restore, and promote sustainable use of 
+    terrestrial ecosystems, manage forests sustainably, combat desertification, and halt and reverse land 
+    degradation and halt biodiversity loss.
+16. [**Peace, Justice, and Strong Institutions**](https://sdgs.un.org/goals/goal16): Promote peaceful and inclusive 
+    societies for sustainable development, provide access to justice for all, and build effective, accountable, and 
+    inclusive institutions at all levels.
+17. [**Partnerships for the Goals**](https://sdgs.un.org/goals/goal17): Strengthen the means of implementation and 
+    revitalize the global partnership for sustainable development.
+
+## Application in Classification of Research Products
+
+The SDG taxonomy is used to classify research products based on their relevance to the overarching goals. This 
+classification helps in identifying the impact of research on sustainable development and aligning research efforts 
+with global priorities. Here’s how it can be applied:
+
+1. **Mapping Research Outputs**: Research outputs such as publications are be mapped to specific SDGs based on their 
+   objectives, methodologies, and outcomes.
+2. **Evaluating Impact**: The classification allows for the evaluation of the impact of research on achieving the 
+   SDGs, helping to highlight contributions to specific goals.
+3. **Funding and Collaboration**: Aligning research with SDGs can attract funding from organizations focused on 
+   sustainable development and foster collaborations with other researchers and institutions working towards 
+   similar goals.
+4. **Policy and Decision-Making**: Policymakers can use the classification to identify research that supports 
+   sustainable development policies and make informed decisions based on evidence from relevant research.
+
+By integrating the SDG taxonomy into the classification of research products, we can ensure that research efforts 
+are directed towards addressing the most pressing global challenges and contributing to a sustainable future.
+
+## Conclusion
+
+The Sustainable Development Goals provide a comprehensive framework for addressing global challenges. By applying 
+the SDG taxonomy to classify research products, we can better understand and enhance the impact of research on 
+sustainable development, ensuring that scientific advancements contribute to a more equitable and sustainable world.
+
+Check an example of how the SDG classification appears in the OpenAIRE data in the 
+[data model](../../data-model/entities/research-product#subjects) section.
\ No newline at end of file
diff --git a/sidebars.js b/sidebars.js
index 34c8b35..6616450 100644
--- a/sidebars.js
+++ b/sidebars.js
@@ -158,9 +158,7 @@ const sidebars = {
           label: "Enrichment by PID",
           link: {type: 'doc', id: 'graph-production-workflow/enrichment-by-pid/enrichment-by-pid'},
           items: [
-              { type: 'doc', id: 'graph-production-workflow/enrichment-by-pid/orcid-enrichment' },
-              { type: 'doc', id: 'graph-production-workflow/enrichment-by-pid/fos-classification' },
-              { type: 'doc', id: 'graph-production-workflow/enrichment-by-pid/sdg-classification' }
+              { type: 'doc', id: 'graph-production-workflow/enrichment-by-pid/orcid-enrichment' }
             ]
         },
         {
@@ -208,6 +206,8 @@ const sidebars = {
           items: [
             { type: 'doc', id: 'graph-production-workflow/indicators-ingestion/impact-indicators' },
             { type: 'doc', id: 'graph-production-workflow/indicators-ingestion/usage-counts' },
+            { type: 'doc', id: 'graph-production-workflow/indicators-ingestion/fos-classification' },
+            { type: 'doc', id: 'graph-production-workflow/indicators-ingestion/sdg-classification' }
           ]
         },
         { type: 'doc', id: 'graph-production-workflow/finalisation' },