.. _fwflag_add_wn_nopos:
================
--add_wn_nopos
================
Switch
======

--add_wn_nopos

Description
===========

Creates a WordNet concept feature table (each word mapped to its WordNet noun synsets, without part-of-speech disambiguation), based on an existing 1gram feature table.

Argument and Default Value
==========================

No argument. Boolean switch, default: ``False``. Requires the ``nltk`` WordNet corpus (``python -c "import nltk; nltk.download('wordnet')"``).

Details
=======

Requires a word table (default ``feat$1gram$<corptable>$<correl_field>``) to already exist — build it first with :doc:`fwflag_add_ngrams`.

**Known issue — broken in SQLite mode.** ``FeatureExtractor.addWNNoPosFeat()`` creates the destination table correctly (through the SQLite-aware path), but then checks the source word table's existence via ``mm.tableExists(...)`` — a raw ``mysqlmethods`` call. Verified: the feature table gets created empty, then the run crashes with ``sqlite3.OperationalError: near "show": syntax error`` before any WordNet lookups happen, leaving a 0-row table behind.

Other Switches
==============

Required Switches:

* :doc:`fwflag_d`, :doc:`fwflag_c`, :doc:`fwflag_t`
* :doc:`fwflag_add_ngrams` (must be run first, to build the word table)

Optional Switches:

* :doc:`fwflag_word_table` (to point at a non-default word table)

Example Commands
================

Requires MySQL — broken against SQLite, see Known issue above:

.. code-block:: bash

	dlatkInterface.py -d dla_tutorial -t msgs -c user_id --add_ngrams -n 1
	dlatkInterface.py -d dla_tutorial -t msgs -c user_id --add_wn_nopos