Adjacency

Adjacency is the relation between two branches in a tree structure. In the UNL^arium framework, adjacency is used to represent the structure of maximal projections and, therefore, to state the distance of constituents in relation to the head.

The number of intermediary projections define the values of the adjacency in the UNL^arium framework, which are the following:

{{#tree:id=ADC|openlevels=0|root=Adjacency (AJC)|

• AJ1: there is only one projection between the constituent and the head (i.e., the constituent is adjacent to the head)
• AJ2: there are two projections between the constituent and the head (i.e., the constituent is adjacent to the lowest intermediary projection)
• AJ3: there are three projections between the constituent and the head (i.e., the constituent is adjacent to the second lowest intermediary projection)
• AJ4: there are four projections between the constituent and the head (i.e., the constituent is adjacent to the third lowest intermediary projection)
• AJB: the constituent is adjacent to the highest intermediary projection (i.e., is the most distant constituent to the head except "spec")
• AJP: the constituent is adjacent to the maximal projection (i.e., is the most distant constituent to the head, including "spec")

}}

Examples

         XP
        / \
     spec XB4
          / \
        XB3  adjt2
        / \
     XB2 adjt1
     / \
   XB1 comp2
   /  \
  X  comp1

In structure above:

• comp1 = AJ1 (there is only one projection (XB1) between comp1 and X)
• comp2 = AJ2 (there are two projections (XB1 and XB2) between comp2 and X)
• adjt1 = AJ3 (there are three projections (XB1, XB2 and XB3) between adjt1 and X)
• adjt2 = AJ4 (there are four projections (XB1, XB2, XB3, XB4) between adjt2 and X)