diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
new file mode 100644
index dea5195..0386330
*** a/doc/src/sgml/datatype.sgml
--- b/doc/src/sgml/datatype.sgml
***************
*** 83,100 ****
- character varying [ (n) ]
- varchar [ (n) ]
- variable-length character string
-
-
-
character [ (n) ]
char [ (n) ]
fixed-length character string
cidr
IPv4 or IPv6 network address
--- 83,100 ----
character [ (n) ]
char [ (n) ]
fixed-length character string
+ character varying [ (n) ]
+ varchar [ (n) ]
+ variable-length character string
+
+
+
cidr
IPv4 or IPv6 network address
***************
*** 137,142 ****
--- 137,148 ----
+ json
+
+ JSON data
+
+
+
line
infinite line on a plane
***************
*** 269,280 ****
XML data
-
-
- json
-
- JSON data
-
--- 275,280 ----