Draw syntactic trees, etc., for linguistics literature, using xy-pic
Description
The macros in this package model the construction of linguistic tree structures
as a genuinely graphical problem: they contain two types of objects, BRANCHES
and NODE LABELS, and these are positioned relative to a GRID. It is essential
that each of these three elements is constructed independent of the other two,
and hence they can be modified without unwanted side effects. The macros are
based on the xy-pic package.
