In this paper, the enumeration structure is inquired from a grammatical aproach and a computational linguistics perspective. For this, some theoretical aspects based on the nature of the elements that compose the enumeration, the relation among the enumeration, the matrix that contains it and the syntactic element that allows the enumeration in the sentence are exposed. Afterwards, a modelization that allows a computational implementation are made. NooJ program was used for the computational work. The method has been checked in a corpus composed by Biomedical Wikipedia entries, and it got 88,40% of precision, 90,19% of recall and 89,82% of F-Measure. Finally, the contributions of this paper for grammatical studies and computational linguistics are presented, and new lines of work are proposed.