add header

diff --git a/doc/unlang/data.adoc b/doc/unlang/data.adoc
index 24ca2e22e61c7a9dea4dd03f4a5b3031a4f4cf31..216d454104daee46bc1e5bfe63e4fdefec612bab 100644 (file)
--- a/doc/unlang/data.adoc
+++ b/doc/unlang/data.adoc
@@ -51,6 +51,7 @@ only be used in the dictionaries.  These data types cannot be used in
 [options="header"]
 [cols="15%,85%"]
 |=====
+| Data Type     | Description
 | struct       | structure which contains fixed-width fields
 | tlv          | type-length-value which contains other attributes
 | vsa          | Encapsulation of vendor-specific attributes