'API for SSF'
                '-----------'

'REPRESENTATION'
'--------------'

'Index   Num     F1      F2      F3      F4'
'-----   ---     --      --      --      --'
(0)     11      0       ((      SSF
(1)     3       1       ((      NP      f1
(2)     1       1.1     Ram     NNP     f1.1
(3)                     ))
(4)     6       2       ((      VGADV   f2
(5)     4       2.1     ((      VG      f2.1
(6)     1       2.1.1   is      VBZ     f2.1.1
(7)     1       2.1.2   playing VBG     f2.1.2
(8)                     ))
(9)                     ))
(10)                    ))

'The above Data-structure (array) would be stored in @_TREE_'


#% Reads the file into the data-structure @_TREE_
#% &read ([$filename]) --> -nil-
 
#% Prints the data-structure
#% &print_tree( [$tree] )	-nil-

#% &print_node($node,[$tree])	-nil-
 
#% Gets the children nodes
#% &get_children( $node , [$tree] )  -> @children_nodes;
#% To get children of root, $node = 0;

#% Gets the Leaf nodes
#% &get_leaves( [$tree] )  -> @leaf_nodes;

#% Gets the Leaf nodes
#% &get_leaves_child($node, [$tree] )  -> @leaf_nodes of that node;

#% Get the nodes which have a particular field-value.
#% &get_nodes( $fieldnumber , $value , [$tree] ) -> @required_nodes

#% Get the nodes which have a particular field-value.
#% &get_nodes_pattern( $fieldnumber , $value , [$tree] ) -> @required_nodes

#% Deletes a node
#% &delete_node( $node , [$tree] )

#% Create a parent for a sequence of nodes 
#% &create_parent( $node_start , $node_end , $tag , [$tree] );

#% Delete the parent but keep the children
#% &delete_layer ( $node , [$tree] )

#% Creates a new tree
#% &create_tree;  -> $empty_tree;
#% Only SSF as the parent will be there.

#% &add_tree($tree, $sibling_tree, $direction(0/1), [$tree])   -> -nil-

#% &add_node ( $tree , $sibling_node , $direction (0/1) ,[$tree]) -> $index_node

#% Get's all the fields of a given leaf/node
#% &get_fields ( $node , [$tree] ) -> ($zeroth,$first,$second,$third,$fourth)

#% Get a particular field of a leaf/node
#% &get_field ( $node , $fieldnumber , [$tree] ) -> $value_of_field

#% Modify a particular field of a leaf/node
#% &modify_field( $node , $fieldnumber , $value , [$tree] )

#% Copy a node as another tree
#% &copy ( $node ) -> $tree
#% If entire tree has to be copied, $node = 0

#% Move a node to a particular place
#% &move_node( $node , $node2 , $direction , [$tree] )
#% $direction = 0 if before the sibiling, 1 if after ths sibling

#% Copy the entire tree
#% copy_tree ( [$tree] ) -> $tree2

#% Gets the parent of a node
#% &get_parent( $node , [$tree] ) -> $parent_node

#% Gets the next sibling
#% &get_next_node( $node , [$tree] ) -> $next_node

#% Gets the previous sibling
#% &get_previous_node( $node , [$tree] ) -> $previous_node

#% Adds a leaf before/after a node
#% &add_leaf( $node , $direction[0/1] , $f2 , $f3, $f4)

#% Changes Old Shakti representation to New Shakti Representation
#% &change_old_new($Tree)  -> -nil-
 
#% Changes the new Shakti Representation to the Old Shakti Representation
#% &change_new_old($Tree) -> -nil-