--- a/relpipe-data/specification.xml	Wed Nov 28 17:19:13 2018 +0100
+++ b/relpipe-data/specification.xml	Thu Nov 29 22:09:58 2018 +0100
@@ -13,6 +13,28 @@
 			Please stay tuned for this stable version which will deliver specification such complete and precise 
 			that independent implementation of the format will be possible.
 		</p>
+		
+		<h2>Stream structure structure</h2>
+		
+		
+		<m:tabulka>
+			id	name	description
+			0x1D	start	start of the relation
+			0x1E	record	start of the record
+		</m:tabulka>
+		
+		
+		<h2>Data types</h2>
+		
+		<p>Currently, there are only three data types.</p>
+		
+		<m:tabulka>
+			typeId	code	description
+			0x01	boolean	logical value, true/false
+			0x02	integer	unsigned integer number of arbitrary length
+			0x03	string	character string in UTF-8
+		</m:tabulka>
+		
 	</text>
 
 </stránka>