adding structure to docs root

Author: jodebrui

samples/databases/wide-world-importers/documentation/root.md

@@ -12,10 +12,14 @@ The latest released version of the sample:
 
 The documentation for the sample is organized as follows:
 
+## Overview
+
 __[Wide World Importers Overview](wwi-overview.md)__
 
 Overview of the sample company Wide World Importers, and the workflows addressed by the sample.
 
+## Main OLTP Database WideWorldImporters
+
 __[WideWorldImporters Installation and Configuration](wwi-oltp-htap-installation.md)__
 
 Instructions for the installation and configuration of the core database WideWorldImporters that is used for transaction processing (OLTP - Online Transaction Processing) and operational analytics (HTAP - Hybrid Transaction and Analytics Processing).
@@ -32,6 +36,8 @@ __[WideWorldImporters Sample Queries](wwi-oltp-htap-sample-queries.md)__
 
 Sample queries for the WideWorldImporters database.
 
+## Data Warehousing and Analytics Database WideWorldImportersDW
+
 __[WideWorldImportersDW Installation and Configuration](wwi-olap-installation.md)__
 
 Instructions for the installation and configuration of the OLAP database WideWorldImportersDW.
@@ -51,3 +57,9 @@ Describes how the WideWorldImportersDW leverages SQL Server features for analyti
 __[WideWorldImportersDW OLAP Sample Queries](wwi-olap-sample-queries.md)__
 
 Sample analytics queries leveraging the WideWorldImportersDW database.
+
+## Data generation
+
+__[WideWorldImporters Data Generation](wwi-data-generation.md)__
+
+Describes how additional data can be generated in the sample database, for example inserting sales and purchase data up to the current date.

samples/databases/wide-world-importers/documentation/wwi-data-generation.md

@@ -0,0 +1 @@
+# WideWorldImporters Data Generation