anchor.diff:  will need to be replaced with relationships to structural xtUML.
   
   == 5 Work Required
  +
  +=== 5.1 Identify Structural Blockers
  +
  +. Review the MASL Reference Manual
  +  .. Identify structural constructs linked to statements and expressions
  +     that are available in MASL only.
  +  .. Determine the means and cost of supporting these constructs.
  +  .. Identify potential blockers.
  +
  +=== 5.2 Port MASL Activity to xtUML
   
   . Extract the model of MASL activity from the MASL MC Java classes.
     .. Do this by producing a textual MASL `.mod` file.
  
positive.code: Users want a meaningful increment in place within a few months.  The work
  will be part of a larger demonstration of native AWS architectural support.
  
  === 4.2 Exploration of the MASL Model Compiler
  
  . In the MASL MC there is a 'metamodel' folder with subfolders containing
    Java classes.
  
negative.code:   instances.  The argument lists roughly define the attributes (including
    referentials) of the metamodel classes.
  
  === 4.4 Thoughts
  
  This work can be a **port** of the MASL metamodel from Java to xtUML/MASL.
  By porting, functionality can be preserved, and the effort can be
  