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Prague Arabic Dependency Treebank




Install TrEd including the padt and elixir extensions from the default TrEd repository http://ufal.mff.cuni.cz/~pajas/tred/extensions/.

The SVN repository of the PADT project is https://svn.ms.mff.cuni.cz/svn/padt/. A working copy is accessible at /net/projects/ace/data/arabic/PADT/ on the UFAL network.

The project's data are stored in the main subdirectory data, which is split further into Prague, Penn, and ElixirFM, explained below.

Try opening a PADT file to check if your setup is complete. Run TrEd and open the following files. They should automatically set their editing contexts and stylesheets to PADT::Morpho and PADT::Syntax, respectively:

tred /net/projects/ace/data/arabic/PADT/data/Prague/AEP/UMH_ARB_20040407.0001.{morpho,syntax}.pml

For improved quality of display of the various scripts and trees types, you can use the following setup in TrEd's config file, or similar:

Font = "family:DejaVu Sans Condensed, size:14, weight:normal"

NodeXSkip = 30;
NodeYSkip = 10;


The SVN repository of the PADT project is https://svn.ms.mff.cuni.cz/svn/padt/. The main subdirectory data is split into ElixirFM, Prague, and Penn. Further:




The project's contributors are smrz, bielicky, and zabokrtsky, the rest of ufal have just the read rights.

There is also the 'tools' directory which contains some useful scripts.

The code base for the PADT project, i.e. for annotation, display, and processing of the data, is the TrEd's padt extension, and its elixir extension that is a dependency for padt.


Focus on paragraphs/sentences that miss PADT-Morpho annotation, esp. non-annotated headlines:

btred -QTe '@w = $this->children(); @n = grep { $_->children() } @w; print ThisAddress() . "\n" if @n < 0.9 * @w' Penn/???/*.morpho*.pml 

Focus on nodes in PADT-Syntax that do not have a valid afun annotation:

btred -QTNe 'print ThisAddress() . "\n" if exists $this->{"afun"} and $this->{"afun"} eq "???"' Prague/???/*.syntax*.pml

There are some other task that have been partially solved, but need to be refreshed and completed:

* Retrain the CRF++ model for tagging selected morphological categories and apply it to prune remaining morphological ambiguities.
* Refresh and improve the code and rules for converting PATB phrase syntax trees into dependency trees a la PADT.
* Update PADT::Syntax annotation context (level synchronization, non-conflicting bindings).
* Update PADT::Deeper annotation context (level synchronization, working schemas, modern stylesheets, non-conflicting bindings).
* Improve documentation.


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