diff --git a/README.md b/README.md
index 8ed7971a..256fc0c8 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Docling parses documents and exports them to the desired format with ease and sp
 
 * 🗂️  Multi-format support for input (PDF, DOCX, PPTX, HTML, AsciiDoc, MarkDown) and output (Markdown, JSON, YAML)
 * 📑 Advanced PDF document understanding incl. page layout, reading order & table structures
-* 🧩 Strongly typed Pydantic v2 data structure named [DoclingDocument](https://github.com/DS4SD/docling-core/blob/main/docling_core/types/doc/document.py#L945) which supports hierarchies and provides native iterators and chunkers.
+* 🧩 Strongly typed Pydantic v2 data structure named [DoclingDocument](https://ds4sd.github.io/docling/concepts/docling_document/) which supports hierarchies and provides native iterators and chunkers.
 * 📝 Metadata extraction, including title, authors, references & language
 * 🤖 Seamless LlamaIndex 🦙 & LangChain 🦜🔗 integration for powerful RAG / QA applications
 * 🔍 OCR support for scanned PDFs
diff --git a/docs/concepts/docling_document.md b/docs/concepts/docling_document.md
index 00b5452f..1ac46f55 100644
--- a/docs/concepts/docling_document.md
+++ b/docs/concepts/docling_document.md
@@ -7,6 +7,8 @@ pydantic datatype, which can express several features common to documents, such
 * Layout information (i.e. bounding boxes) for all items, if available
 * Provenance information
 
+The definition of the Pydantic types is implemented in the module `docling_core.types.doc`, more details in [source code definitions](https://github.com/DS4SD/docling-core/tree/main/docling_core/types/doc).
+
 It also brings a set of document construction APIs to build up a `DoclingDocument` from scratch.
 
 ## Example document structures