For all we know, LUI talks a variant of the so-called Linguistic Server Protocol (LSP), which was first implemented in the LKB. This page is intended to document enough of the protocol to make it feasible to connect LUI to other processing engines.

In the following, we take a LUI-centric perspective, i.e. incoming means commands sent to LUI.

• integer

• string

  • surrounded in double quotes

• symbol

  • no quotes

• list

  • [ zero or more space-delimited items of homogeneous type ]

These each look like #D[.....], where the letter D in this case indicates a dag structure, and the contents between the brackets depends on the structure in question.

• dag

• color

• font

• xtext

• xtext_menu

• tree

• failure

• edge

• genedge

  • experimental...

• quit

• parameter symbol value

• message string

• group [ integer ] integer string

• tree integer tree string

• chart integer integer string edge*

• chart integer event symbol integer

• avm integer dag string [ list ]

• text integer xtext string

• update integer

• close integer

• genchart integer list list string

• compare integer+

• parse string symbol symbol symbol

• grammar string

• version string

• quit

• tree integer forget

• avm integer forget

• chart integer forget

• text integer forget

• unify integer list integer list

  • requests that path list1 inside edge int1 be unified with path list2 inside edge int2

• browse integer integer symbol

  • requests further details on edge int2 of context (tree or chart) int1. the last argument may be: avm, avm local, edges, chart, generate, rephrase, mrs simple, mrs indexed, mrs scoped, mrs robust, dependencies, tree, or entity.

• type symbol symbol

  • requests further details on the type symbol1. symbol2 may be: hierarchy, skeleton, expansion, or `source.

• genchart integer explore list