Principle??
+ Can express the user intent vs limited by impl (intesection of all)

Working state:

Key features:
+ Any RDQL query is a DAWG-Q (which implementations??)
+ OPTIONAL is []
+ Triples are ()
+ Conjunction Blocks are implicit
+ Constraints on blocks (avoids n-state logics)
+ No disjunction
+ No UNSAID
+ SOURCE block

Issue with trailing AND and binding (same as if-if-else)




Steve: SOURCE with more than one triple
PREFIX vs USING

Jos: May later need () for lists
  OWL:intersection

Dave: nested optionals issues
- weak objections:3
+ weak: 2
+2 strong


??
v0: no nested optionals; with optionals with []

Var in SELECT and one optional block
Var in SELECT conjunction and one optional block


Strawpoll:
Opposed: Rob
For: JF, Kendall, Dave, Janne, Steve, Alberto
Abstain: Jos, Andy









PREFIX foaf: <...>

SELECT ?name1 ?name2 ?hpage2
WHERE
  (?x foaf:knows ?y)
  SOURCE <http:D2> (?x foaf:age ?n)
  (?x foaf:age ?n) 
  AND ?n < 18
  (?x foaf:name ?name1 )
 
  SOURCE <http:D2> (?x foaf:status ?status)

  SOURCE ?src (?x foaf:status1 ?status1)
  SOURCE ?src (?x foaf:status2 ?status2)
  
  [ ( ?y foaf:name ?name2 ) 
    ( ?y foaf:age  ?m) 
    AND ?m < 18
  ]



----------------------------------------



  [ ( ?y foaf:name ?name2 ) 
    ( ?y foaf:age  ?m) 
    [ ( ?y foaf:homepage ?hpage2 )
    ]
    AND ?m < 18
  ]


SOURCE <http:D2>
   (?x foaf:age ?n)
   (?x foaf:status ?status)
   AND ?status eq "foo"

----------------------------------------

foaf: = <...> //Kendall


Needs two passes:
USING foaf: <...>

??
FROM <file:D1> <file:D2>