A most simple formal grammar

This is the rudimentary version of the grammar, mentioned in the previous post.

sentence {
phrase*
}

phrase {
noun_phrase
| verb_phrase
}

noun_phrase {
noun_article attribute*
}

verb_phrase {
copula attribute*
}

attribute {
<property>
}

noun_article {
ART.ABS
| ART.ERG
}

copula {
COP
}

("Property" here stands for the part of speech consisting of content words. It is the only element which does not have a finite number of possible words in the grammar.)