diff --git a/build/antclick/db.properties b/build/antclick/db.properties
index 1e5274a6..9dc57b94 100644
--- a/build/antclick/db.properties
+++ b/build/antclick/db.properties
@@ -1,11 +1,16 @@
-# This is where you specify relational data sources to
-# map Helma types to an external database
-
-# Comma-separated list of data source names
-sources = myDataSource
-
-# Properties of data sources
-myDataSource.url			= jdbc:mysql://db.domain.com/space
-myDataSource.driver		= org.gjt.mm.mysql.Driver
-myDataSource.user			= username
-myDataSource.password 	= xyz
+# This is where you specify relational data sources to
+# map Helma types to relational databases.
+#
+# If you want to define a data source just for one
+# application, simply copy the db.properties file to
+# the application directory.
+#
+# The actual mapping of types is done in the
+# type.properties file in the prototype directories.
+# 
+
+# Properties of JDBC data sources
+myDataSource.url = jdbc:mysql://db.domain.com/space
+myDataSource.driver = org.gjt.mm.mysql.Driver
+myDataSource.user = username
+myDataSource.password = xyz
diff --git a/build/main/db.properties b/build/main/db.properties
index 1e5274a6..9dc57b94 100644
--- a/build/main/db.properties
+++ b/build/main/db.properties
@@ -1,11 +1,16 @@
-# This is where you specify relational data sources to
-# map Helma types to an external database
-
-# Comma-separated list of data source names
-sources = myDataSource
-
-# Properties of data sources
-myDataSource.url			= jdbc:mysql://db.domain.com/space
-myDataSource.driver		= org.gjt.mm.mysql.Driver
-myDataSource.user			= username
-myDataSource.password 	= xyz
+# This is where you specify relational data sources to
+# map Helma types to relational databases.
+#
+# If you want to define a data source just for one
+# application, simply copy the db.properties file to
+# the application directory.
+#
+# The actual mapping of types is done in the
+# type.properties file in the prototype directories.
+# 
+
+# Properties of JDBC data sources
+myDataSource.url = jdbc:mysql://db.domain.com/space
+myDataSource.driver = org.gjt.mm.mysql.Driver
+myDataSource.user = username
+myDataSource.password = xyz
diff --git a/db.properties b/db.properties
index 1e5274a6..9dc57b94 100644
--- a/db.properties
+++ b/db.properties
@@ -1,11 +1,16 @@
-# This is where you specify relational data sources to
-# map Helma types to an external database
-
-# Comma-separated list of data source names
-sources = myDataSource
-
-# Properties of data sources
-myDataSource.url			= jdbc:mysql://db.domain.com/space
-myDataSource.driver		= org.gjt.mm.mysql.Driver
-myDataSource.user			= username
-myDataSource.password 	= xyz
+# This is where you specify relational data sources to
+# map Helma types to relational databases.
+#
+# If you want to define a data source just for one
+# application, simply copy the db.properties file to
+# the application directory.
+#
+# The actual mapping of types is done in the
+# type.properties file in the prototype directories.
+# 
+
+# Properties of JDBC data sources
+myDataSource.url = jdbc:mysql://db.domain.com/space
+myDataSource.driver = org.gjt.mm.mysql.Driver
+myDataSource.user = username
+myDataSource.password = xyz