UDPipe

First things first

Get the code!

git clone https://github.com/ufal/udpipe
cd udpipe/src
make

Now copy the udpipe/src/udpipe binary executable to somewhere in your $PATH.

Get some data!

git clone https://github.com/UniversalDependencies/UD_Norwegian-Bokmaal
cd UD_Norwegian-Bokmaal

Train a default model

With tokeniser and tagger:

cat no_bokmaal-ud-train.conllu | udpipe  --train nob.udpipe                  

Without tokeniser and tagger:

cat no_bokmaal-ud-train.conllu | udpipe  --tokenizer none --tagger none --train nob.udpipe                  

Parse some input

With gold standard POS tags:

cat no_bokmaal-ud-dev.conllu  |cut -f1-6 | sed 's/$/\t_\t_\t_\t_/g' | sed 's/^\t.*//g'| udpipe --parse nob.udpipe  > output               

Full pipeline:

echo "Det ligger en bok på bordet." | udpipe --tokenize --tag --parse nob.udpipe

Calculate accuracy

udpipe --accuracy --parse nob.udpipe no_bokmaal-ud-dev.conllu

Parameters

For playing with the parameters we're going to try a smaller treebank:

git clone https://github.com/UniversalDependencies/UD_Turkish
cd UD_Turkish

Default parsing options

udpipe --tokenizer none --tagger none --train tur.proj.udpipe < UD_Turkish/tr-ud-train.conllu 

Using the swap algorithm

If we want to support parsing non-projective trees we can use the swap algorithm:

udpipe --tokenizer none --tagger none --parser "transition_system=swap" --train tur.swap.udpipe < tr-ud-train.conllu 

(This will take around 15 minutes)

Using external embeddings

Compile word2vec

git clone https://github.com/dav/word2vec.git
cd word2vec/src
make

Get a corpus and tokenise

cat tur.crp.txt | sed 's/[\[,;:!\]?"“”(){}]/ & /g' | sed 's/  */ /g' > tur-tok.crp.txt

Train word2vec

word2vec -train tur-tok.crp.txt -output tur.vec -cbow 0 -size 50 -window 10 -negative 5 -hs 0 -sample 1e-1 \
 -threads 12 -binary 0 -iter 15 -min-count 2

Now use the embeddings with UDpipe

udpipe --tokenizer none --tagger none --parser "embedding_form_file=tur.vec" --train tur.embeds.udpipe < tr-ud-train.conllu