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 L01 CPG: Parsing Ex.


    Paninian Parsing

How do we analyze a given sentence given 
-  karaka charts
-  karaka chart transformations

And of course, the general sentential constraints
--------------------------
    EXAMPLE KARAKA ASSIGNMENT
- laDakA hAth se laDakI ko phUla detA hE
   boy  hand -with girl-acc flower give-s
  The boy gives a flower to the girl with his hand.
Two possible karaka assignments or parse structures:
o  de (give)::
      - karta:  laDakA (boy)
      - karma:  phUla  (flower)
      - karana: hAtha  (hand)
      - sampradana: laDakI (girl)
o  Same except karta-karma interchanged.
--------------------------
        CONSTRAINT GRAPH

    .------.------------------------.
-   | k1   | k3       .------.------|
-   |      |          | k4   | k2   ^
-   v      v          v      v      |
laDakA  hAth_se  laDakI_ko phUla  detA_hE
   boy  hand_with girl     flower gives
-   |                        |      |
-   | k2                     | k1   v
-   ^------------------------^------|
CONSTRAINT GRAPH: Shows what source words are 
candidates for what karaka demands.
    n --k-<-- v  =
noun is candidate for karaka k for verb
--------------------------
         A SOLUTION GRAPH

    .------.------------------------.
-   | k1   | k3       .------.------|
-   |      |          | k4   | k2   ^
-   v      v          v      v      |
laDakA  hAtha     laDakI   phUla  detA_hE
   boy  hand       girl     flower gives

SOLUTION GRAPH: A subgraph of the constraint graph
that satisfies sentential constraints. 
(Thus, a subset of edges are selected that satisfy the
sentential constraints.)
--------------------------
  SENTENTIAL CONSTRAINTS

o  Each mandatory karaka of a verb-group must be
   assigned to 
    - EXACTLY one source word group
o  Each optional karaka of a verb-group must be
   assigned to 
    - AT MOST one source word group
o  Each source word group must be assigned to
    - EXACTLY one karaka in some verb group.
--------------------------
    ANOTHER SOLUTION GRAPH
           .------------------------.
-          | k3       .-------------|
-          |          | k4          ^
-          v          v             |
laDakA    hAtha   laDakI   phUla   detA
   boy    hand     girl    flower  gives
-   |                        |      |
-   | k2                     | k1   v
-   ^------------------------^------|

Use additional constraints:
o  Yogyata (selectional restriction)
o  Others: 
--------------------------
   ALTERNATE REPRESENTATION
An alternate way of showing a solution graph. 

         detA_hE (give)
       /  |     |     \ 
     k1   k3    k4     k2
    /     |     |        \ 
laDakA   hAtha  laDakI   phUla
 boy      hand   girl    flower

MODIFIER-MODIFIED (VISHESHANA-VISHESHYA) tree:
(A noun that satisfies karaka k of a verb v, will appear as a
child of v with the edge labelled by k.)
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