Test matrix.js 
    @prefix foaf:  <http://xmlns.com/foaf/0.1/>.
    @prefix sched: <http://www.w3.org/ns/pim/schedule#>.
    @prefix cal:  <http://www.w3.org/2002/12/cal/ical#>.
    @prefix dc:    <http://purl.org/dc/elements/1.1/>.


# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-02 ],
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:

#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-02 ],
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:   INCOMPLETE ANSWERS

     :event1 sched:response :r1, :r2.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ],
            # [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ].
            # [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            # [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".
#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-02 ],
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:  NOW COMPLETE

     :event1 sched:response :r1, :r2.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".
#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-02 ],
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:   INCOMPLETE ANSWERS  AGIN -- do they disappear?

     :event1 sched:response :r1, :r2.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ],
            # [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ].
            # [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            # [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".
#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-02 ],
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:

     :event1 sched:response :r1, :r2.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".
#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-02 ],
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:   INCOMPLETE ANSWERS

     :event1 sched:response :r1, :r2.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ],
            # [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ].
            # [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            # [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".
#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-02 ],
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:

     :event1 sched:response :r1, :r2.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".
#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
  ##          [ cal:dtstart 2015-01-02 ],        ### *** remove a column
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".



# answers:

     :event1 sched:response :r1, :r2.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:No; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:No; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".

#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
  ##          [ cal:dtstart 2015-01-02 ],        ### *** remove a column
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:

     :event1 sched:response :r1, :r2.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:No; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:No; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".
#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-02 ],        ### *** add a column
            [ cal:dtstart 2015-01-03 ],        ### *** add a column
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:

     :event1 sched:response :r1, :r2, :r0.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:No; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-03 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:No; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".

     :r0 dc:author :a0;
        sched:cell
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:No; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].

#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-03 ],        ### *** remove a column
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:

     :event1 sched:response :r1, :r2, :r0.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:No; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:No; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".

     :r0 dc:author :a0;
        sched:cell
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:No; cal:dtstart 2015-01-02 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].

#ends

 

# questions:
     :event1 dc:author :a0;
        a sched:YesNoMaybe;
        sched:option
            [ cal:dtstart 2015-01-01 ],
            [ cal:dtstart 2015-01-03 ],        ### *** remove 2015-01-02 entirelt
            [ cal:dtstart 2015-01-05].
     :a0 foaf:name "zoe".


# answers:

     :event1 sched:response :r1, :r2, :r0.
     :r1 dc:author :a1;
        sched:cell
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].
     :a1 foaf:name "Alice".

     :r2 dc:author :a2;
        sched:cell
            [ sched:availabilty sched:No; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-05].
     :a2 foaf:name "Bob".

     :r0 dc:author :a0;
        sched:cell
            [ sched:availabilty sched:Yes; cal:dtstart 2015-01-01 ],
            [ sched:availabilty sched:Maybe; cal:dtstart 2015-01-05].

#ends