diff --git a/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/annotation.svg b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/annotation.svg
new file mode 100644
index 0000000..5637347
--- /dev/null
+++ b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/annotation.svg
@@ -0,0 +1,3 @@
+
+
+
\ No newline at end of file
diff --git a/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/core.svg b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/core.svg
new file mode 100644
index 0000000..2dff41a
--- /dev/null
+++ b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/core.svg
@@ -0,0 +1,3 @@
+
+
+
\ No newline at end of file
diff --git a/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/etymology.drawio b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/etymology.drawio
index 4402625..3ff3e01 100644
--- a/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/etymology.drawio
+++ b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/etymology.drawio
@@ -1 +1 @@
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diff --git a/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/etymology.svg b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/etymology.svg
new file mode 100644
index 0000000..63a1c5a
--- /dev/null
+++ b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/etymology.svg
@@ -0,0 +1,3 @@
+
+
+
\ No newline at end of file
diff --git a/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/linking.svg b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/linking.svg
new file mode 100644
index 0000000..0e4cd9e
--- /dev/null
+++ b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/linking.svg
@@ -0,0 +1,3 @@
+
+
+
\ No newline at end of file
diff --git a/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/values.svg b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/values.svg
new file mode 100644
index 0000000..97592b5
--- /dev/null
+++ b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/values.svg
@@ -0,0 +1,3 @@
+
+
+
\ No newline at end of file
diff --git a/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/xlingual.svg b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/xlingual.svg
new file mode 100644
index 0000000..d7edc4b
--- /dev/null
+++ b/dmlex-v1.0/specification/serializations/RDB/databaseDiagrams/xlingual.svg
@@ -0,0 +1,3 @@
+
+
+
\ No newline at end of file
diff --git a/dmlex-v1.0/specification/serializations/RDB/specification.xml b/dmlex-v1.0/specification/serializations/RDB/specification.xml
index 6e23339..eb823f3 100644
--- a/dmlex-v1.0/specification/serializations/RDB/specification.xml
+++ b/dmlex-v1.0/specification/serializations/RDB/specification.xml
@@ -28,6 +28,65 @@
+
+ Database diagrams
+
+ The following diagrams provide a high-level overview of the relational database serialization of DMLex.
+ Each diagram presents a "view" of the database from the perspective of one of the modules or from the perspective of the DMLex Core.
+ The diagrams shown here follow the usual conventions used in relational database diagrams:
+
+
+
+ Each box represents a database table and contains a list of its column headings.
+ The abbreviation PK next to a column name indicates that the column is a primary key.
+ The abbreviation FK next to a column name indicates that the column is a foreign key.
+
+
+
+
+ Lines between the boxes represent relationships between tables,
+ with the conventional "crow's feet" symbols at the ends of the lines
+ to indicate the relation's arity (one-to-many etc.).
+
+
+
+ In addition to that, the following non-standard conventions are used in the diagrams:
+
+
+ A curly bracket surrounding a group of foreign keys in a table indicates the constraint
+ that exactly one of the foreign keys in this group must be non-empty while all the other ones must be null.
+
+
+ Tables and columns shown in grey are tables are defined in another module (or in the core)
+ and are shown only for information.
+
+
+
+ Database diagram: DMLex Core
+
+
+
+ Database diagram: DMLex Crosslingual Module
+
+
+
+ Database diagram: DMLex Controlled Values Module
+
+
+
+ Database diagram: DMLex Linking Module
+
+
+
+ Database diagram: DMLex Annotation Module
+
+
+
+ Database diagram: DMLex Etymology Module
+
+
+
+
DMLex relational database serialization tables