diff --git a/docs/graph-production-workflow/enrichment-by-mining/enrichment-by-mining.md b/docs/graph-production-workflow/enrichment-by-mining/enrichment-by-mining.md
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@@ -0,0 +1,18 @@
+import DocCardList from '@theme/DocCardList';
+
+
+# Enrichment by mining
+
+**OpenAIRE** collects the full-texts of the publications, in order to apply TDM (Text and Data Mining) algorithms on them and enrich the Graph with inference links.
+
+The collection of the full-texts is handled by the internal **PDF Aggregation Service**. This service uses the publications' urls, from the OpenAIRE Graph and state-of-the-art algorithms, to crawl the web and try to locate and download the full-texts of the open access publications, while focusing on the most recent ones. It respects the servers of the repositories and publishers and avoids overloading them.
+
+The service is orchestrating a distributed execution system, on the cloud, with multiple microservices running in parallel, in order to efficiently process and download a large number of publications. The microservices store the generated report records for the publications, in a database, and the full-texts in an S3 Object Store.
+
+On the publication-page level, it applies text-mining algorithms to analyze the structure of the page, extract the full-text url and download the file. Additionally, it tracks various performance indicators to optimize the crawling speed, during execution.
+
+The PDF Aggregation Service is also capable of bulk-importing full-texts from compatible data sources, which increases the collection speed of full-texts.
+
+The different Text and Data Mining (TDM) algorithms used in the graph-enrichment process are grouped in the following categories.
+
+<DocCardList></DocCardList>
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diff --git a/sidebars.js b/sidebars.js
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--- a/sidebars.js
+++ b/sidebars.js
@@ -108,10 +108,7 @@ const sidebars = {
         {
           type: 'category', 
           label: "Enrichment by mining",
-          link: {
-            type: 'generated-index',
-            description: 'The OpenAIRE Graph is enriched using the different Text and Data Mining (TDM) algorithms that are grouped in the following categories.'
-          },
+          link: {type: 'doc', id: 'graph-production-workflow/enrichment-by-mining/enrichment-by-mining'},
           items: [
               { type: 'doc', id: 'graph-production-workflow/enrichment-by-mining/affiliation_matching' },
               { type: 'doc', id: 'graph-production-workflow/enrichment-by-mining/citation_matching' },