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diff --git a/guides/ReportingGuide.md b/guides/ReportingGuide.md
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--- a/guides/ReportingGuide.md
+++ b/guides/ReportingGuide.md
@@ -16,6 +16,7 @@ Table of Contents
 * [User management](#user-management)
 * [Scenarios](#scenarios)
 * [Creating an Equella-Enabled BIRT Report Designer Binary](#creating-an-equella-enabled-birt-report-designer-binary)
+* [Equella Table Structures](#equella-table-structures)
 
 ## Report Designer overview 
 
@@ -604,3 +605,12 @@ User and Group information queries require careful implementation as each record
 
 # Creating an Equella-Enabled BIRT Report Designer Binary
 A given BIRT RD Equella release binary is comprised of a standard binary of BIRT RD, along with the Equella plugins from [equella/equella-reporting-plugin](https://github.com/equella/equella-reporting-plugin).  These plugins are the same plugins used in the Equella application to receive requests from BIRT RD, and to run the reports that have been added to Equella.
+
+## Equella Table Structures
+
+* [audit_log_entry table](EQUELLA_Table_Structures_audit_log_entry.pdf) – The contents of these columns changes based on the event_type and event_category
+* [tleuser join item table structure](EQUELLA_Table_Structures_tleuser_join_item.pdf) – Often we want to generate a report that joins the tleuser table with the item table. The join is: tleuser.uuid = item.owner
+* [tleuser__item__audit_log_entry__language_string structure](EQUELLA_Table_Structures_tleuser_item_audit_log_entry_language_string.pdf) – Relationships between tleuser, audit_log_entry, language_string, item
+
+
+