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Docs - Table of Contents

Alignment Format

This page describes the format of the alignments produced by the automatic aligner and by JAMR.

The alignments are in the ::alignments field. The alignments align spans of tokens in the ::tok field with graph fragments. The format is a space separated list of spans with their graph fragments. It looks like this:

span1_start-span1_end|span1_node1+span1_node2+... span2_start-span2_end|span2_node1+span2_node2+...

Each node is specified by a descriptor (a Gorn address): 0 for the root node, 0.0 for the first child of the root node, 0.1 for the second child of the root node, etc. (Our numbering system skips variable re-entrancies.)

So for the sentence:

2002-01-05

and the AMR:

(d / date-entity
  :year 2002
  :month 1
  :day 5)

The alignments 0-1|0+0.0+0.1+0.2 align the first token (tokens 0 to 1, not including 1) to the graph fragment:

(d / date-entity
  :year 2002
  :month 1
  :day 5)

Another example:

# ::tok International ; military ; terrorism
# ::alignments 1-2|0 4-5|0.2 2-3|0.1 0-1|0.0
(a / and
  :op1 (i / international)
  :op2 (m / military)
  :op2 (t / terrorism))

Concept and is aligned to token 1 ; Concept international is aligned to token 0 International etc.

Another example:

# ::tok Saudi Arabia ( SA )
# ::alignments 0-2|0+0.0+0.0.0+0.0.1
(c / country
  :name (n / name
          :op1 "Saudi"
          :op2 "Arabia"))

The graph fragment

(c / country
  :name (n / name
          :op1 "Saudi"
          :op2 "Arabia"))

is aligned to the tokens 0-2 Saudi Arabia.

The numbering system skips variable re-entrancies:

# ::tok North Korea has denied the IAEA full access to its facilities .
# ::alignments 0-2|0.0+0.0.0+0.0.0.0+0.0.0.1 5-6|0.2+0.2.0+0.2.0.0 3-4|0 7-8|0.1 6-7|0.1.1 10-11|0.1.0 ::annotator Aligner v.02 ::date 2014-08-08T20:42:25.346
(d / deny-01
  :ARG0 (c / country
          :name (n / name
                  :op1 "North"
                  :op2 "Korea"))
  :ARG1 (a / access-01
          :ARG0 o
          :ARG1 (f / facility
                  :poss c)
          :mod (f2 / full))
  :ARG2 (o / organization
          :name (n2 / name
                  :op1 "IAEA")))

So concept facility is 0.1.0 instead of 0.1.1.