foreign-data.md

@@ -53,6 +53,10 @@ a "string" to be output as utf8, utf16 or ucs4 unicode code points depending on
 
 ```
 
+
+if the data is initialized as a string, \<n\> will always refer to a number of characters regardless of encoding and the string will be null terminated (unless an explicit \<n\> chops off the trailing space)
+
+
 ## implementation