diff --git a/input/images-source/actors_transactions.plantuml b/input/images-source/actors_transactions.plantuml
index 5447120..09a94bb 100644
--- a/input/images-source/actors_transactions.plantuml
+++ b/input/images-source/actors_transactions.plantuml
@@ -20,7 +20,7 @@ CRS -r-> CRT : " 1. Submit Case Report \n(Individual form)"
 
 EHR -r-> CRM : "                                          4. Provide case data                                    "
 
-CSV -r-> CRI : "         3. Store case data        "
+CSV -r-> CRI : "     3. Store case data     "
 
 CRI -d-> CRT : " 1. Submit\nCase Report\n (Bulk legacy data import)\n"
 
diff --git a/input/pagecontent/data-models.md b/input/pagecontent/data-models.md
new file mode 100644
index 0000000..721fe10
--- /dev/null
+++ b/input/pagecontent/data-models.md
@@ -0,0 +1,14 @@
+This page describes the abstract data models used in this specification.
+
+These are the models:
+* Data entry form
+* Extracted Bundle
+* CSV / tabular format
+
+And a table for maturity of the models:
+
+|Model|Maturity|
+|---|----|
+|Data Entry Form| 3 |
+|Bundle| 2 |
+|CSV| 5 |
diff --git a/input/pagecontent/how-to-read.md b/input/pagecontent/how-to-read.md
index 7f52512..1ad95a7 100644
--- a/input/pagecontent/how-to-read.md
+++ b/input/pagecontent/how-to-read.md
@@ -19,8 +19,9 @@ The remainder of the implementation guide contains useful narrative such as cont
 
 ### Maturity and normative status
 This specification has a status indicated in the front page. Each part of its content (pages, workflows, artifacts) is classified according to
-* **Maturity**
+* **Maturity** - The maturity rules for this IG Will follow the HL7 FMM guidelines.
 * **Normative status** - content can be **normative** or **informative**:
   * **Normative content** defines expectations that must be met to be able to claim conformity with the specification. Examples are actor definitions and required transactions, or profiles with required elements and terminology constraints.
   * **Informative content** is used as guidance, and does not require to be used or adhered to. Examples of informative content are informative pages, references, etc.
 
+  
diff --git a/sushi-config.yaml b/sushi-config.yaml
index dc18c66..962a2a6 100644
--- a/sushi-config.yaml
+++ b/sushi-config.yaml
@@ -142,6 +142,8 @@ pages:
     title: Data exchange
     dependencies.xml:
       title: Dependencies
+    data-models.md:
+      title: Data Models
     actors.xml:
       title: Actors
     transactions.xml: