stared on discont const

doc/tutorial/gf-tutorial2.html

@@ -1239,11 +1239,45 @@ the adjectival paradigm in which the two singular forms are the same, can be def
     }
 </pre>
 
+
+<!-- NEW -->
+<h4>Discontinuous constituents</h4>
+
+A linearization type may contain more strings than one. 
+An example of where this is useful are English particle
+verbs, such as <i>switch off</i>. The linearization of
+a sentence may place the object between the verb and the particle:
+<i>he switched it off</i>.
+
+<p>
+
+The following grammar defines transitive verbs as a
+<b>discontinuous constituents</b>, i.e. as having a linearization
+type with two strings and not just one:
+<pre>
+  
+</pre>
+
+
+
+<!-- NEW -->
+<h4></h4>
+
+
+<!-- NEW -->
+<h4></h4>
+
+
+
 <!-- NEW -->
 <h2>Topics still to be written</h2>
 
 
-Discontinuous constituents
+Free variation
+
+<p>
+
+Record extension, tuples
 
 <p>