document genericity of data support

contents/index.html

@@ -184,6 +184,16 @@ v1.0) as well as
 automatically determine which version is best for each input size (new in v0.9).
   </p>
 
+<h4>Genericity</h4>
+  <p>
+The StarPU programming interface is very generic. For intance, various data
+structures are supported mainline (vectors, dense matrices, CSR matrices, ...),
+but application-specific data structures can also be supported, provided that
+the application describes how data is to be transfered (e.g. a series of
+contiguous blocks). That was for instance used for hierarchically-compressed
+matrices (h-matrices).
+  </p>
+
 <h4>Data transfers</h4>
   <p>
 To relieve programmers from the burden of explicit data transfers, a high-level