Here the split occurs in the application functionality, one part going to the 
client, other to the server. Distributed function applications are the most 
complex of the three typologies  since two separately compiled application 
programs must be developed.  Developers must analyze where each 
function should reside and what type of dialog must occur between the 
two programs. The underlying communications facilities may implement 
either a message-based or remote procedure call (RPC) mechanism for 
transfer of dialog and data.  However, there are many variants of this 
typology. One variant of the distributed function style is where data 
management and application function occur at both the client and server. 
In this instance, data management at the client would include referential, 
read-only data. Data frequently updated or accessed by many users would 
reside on the server.