Talk:Recursive transfer

testing transfer4

In https://svn.code.sf.net/p/apertium/svn/branches/transfer4 you can do:

cd eng-kaz
make
# might give some warnings

# before and after transfer:
cat input/input.02.txt
cat input/input.02.txt | ./parser 

# /tmp/input.02.parse contains the parse, using parentheses
cat input/input.02.txt | ./parser -p 2>/tmp/input.02.parse

# visualise it with tex:
cat /tmp/input.02.parse | python3 ../brackets-parse.py -x >/tmp/input.02.tex
xelatex /tmp/input.02.tex

# or with graphviz:
cat /tmp/input.02.parse | python3 ../brackets-parse.py >/tmp/input.02.dot
dot -Tpdf /tmp/input.02.dot -o/tmp/input.02.pdf

<spectie> you can also generate a parser from an existing .t1x file 
<spectie> ../AST/create-parser.y
<spectie> ../AST/create-parser.py
<spectie> but it only does 1 level, and also, t1x rule patterns aren't
	  necessarily ideal  [18:59]
<spectie> $ python3 ../AST/create-parser.py <
	  ~/source/apertium/trunk/apertium-sme-nob/apertium-sme-nob.sme-nob.t1x 
<spectie> because they overlap in ambiguous ways  [19:00]

Old stuff

Deliverable 1

• A program which reads a grammar using bison, parses a sentence and outputs the syntax tree as text, or graphViz or something.
  • See: https://svn.code.sf.net/p/apertium/svn/branches/transfer4/format-parse.py

Deliverable 2

• Program which takes output of lt-proc -b (biltrans) and applies a grammar, doing only reordering (and "insertion"/"deletion"), no tag changes
  • The input would be ^sl/tl$ and the output would be ^tl$
  • The grammar can be specified using a simple text-based CFG grammar formalism, converted into bison and compiled.

Input

^Hau<prn><dem><sg>/This<prn><dem><sg>$ 
^irabazle<n>/winner<n><ND>$ 
^bat<num><sg>/a<det><ind><sg>$ 
^en<post>/of<pr>$ 
^historia<n>/story<n><ND>$ 
^a<det><art><sg>/the<det><def><sg>$ 
^izan<vbsint><pri><NR_HU>/be<vbser><pri><NR_HU>$
^.<sent>/.<sent>$

Output

^This<prn><dem><sg>$ 
^be<vbser><pri><NR_HU>$
^the<det><def><sg>$ 
^story<n><ND>$ 
^of<pr>$ 
^a<det><ind><sg>$ 
^winner<n><ND>$ 
^.<sent>$

Grammar

S -> SN SV sent { $1 $2 $3 }
SV -> SN v { $2 $1 }
SN -> N3 art { $2 $1 } | N3 { $1 } 
N3 -> SNGen N2 { $2 $1 } | N2 { $1 } 
N2 -> nom { $1 } | prn { $1 } 
SNGen -> SN genpost { $2 $1 }
sent -> "sent" { $1 } 
v -> "vbser.*" { $1 } | "vblex.*" { $1 } 
art -> "det.art.*" { $1 } | "num.sg" { $1 } 
nom -> "n" { $1 } 
prn -> "prn.*" { $1 } 

Deliverable 3

• An XML format for the rules, based on the current format, taking into account transfer operations