diff --git a/src/doc/Glossary.md b/src/doc/Glossary.md
index 080c2aea4ff393d349553f7d7211d35518ff7c11..39baab24d17fae531dd18d0f4a1fcc2329ec1035 100644
--- a/src/doc/Glossary.md
+++ b/src/doc/Glossary.md
@@ -1,5 +1,9 @@
 # Glossary
 
+## Valid ID
+
+The ID of an existing entity. It is by definition unique among the IDs of all existing entities and is a positive integer."
+
 ## Valid Unique Existing Name
 
 A name of an exiting entity which is unique among the names of all existing entities.
@@ -8,10 +12,6 @@ A name of an exiting entity which is unique among the names of all existing enti
 
 A name of a to-be-inserted/updated entity _e_ which is unique among the names of all other entities that are to be inserted or updated along with the entity _e_.
 
-## Valid ID
-
-The ID of an existing entity. It is by definition unique among the IDs of all existing entities and is a positive integer."
-
 ## Valid Unique Temporary ID
 
 The negative integer ID of a to-be-inserted entity _e_ which is unique among the ids of all other entities that are to be inserted along with the entity _e_. 
diff --git a/src/doc/concepts.rst b/src/doc/concepts.rst
index 0db6186302302767c49735bcdfa81364685573f9..4403c95810f9b2edaa67e8561306b80031ac803e 100644
--- a/src/doc/concepts.rst
+++ b/src/doc/concepts.rst
@@ -7,7 +7,7 @@ Basic concepts of the CaosDB server
    :glob:
 
    Data Model <Data-Model>
-   Permissions
+   permissions
    roles
 
 The CaosDB server provides the HTTP API resources to users and client libraries.  It uses a plain
diff --git a/src/doc/Permissions.rst b/src/doc/permissions.rst
similarity index 100%
rename from src/doc/Permissions.rst
rename to src/doc/permissions.rst