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<font size="+1">OK! Doubts solved! Thank you!<br>
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<font size="+1">Cheers,<br>
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<font size="+1">jmm</font><br>
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<div class="moz-cite-prefix">El 22/04/13 18:55, Stefan Evert
escribió:<br>
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On 22 Apr 2013, at 17:41, Jose Manuel Martinez Martinez <a class="moz-txt-link-rfc2396E" href="mailto:jmmtra@gmail.com"><jmmtra@gmail.com></a> wrote:
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<pre wrap="">Just one more question, if I had subjects who don't know any foreign language, should I write...
foreign_languages="||"
I assume, by anology, that should be the way to do it.
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The correct format is
        foreign_languages="|"
i.e. a single "|" symbol.
The logic behind the notation is quite simple: "|" stands for an empty set. Each feature you add to the set has another "|" appended to it.
Cheers,
Stefan
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