The Greek Morphological Lexicon distinguishes pronouns on the basis of the feature Type (e.g. personal, indefinite, possessive, etc.).
It is noted here that a special category, that of pou, has been created for the coding of the word `pou' which is highly ambiguous in Greek. It may function as an uninflected relative pronoun, a subordinating conjunction, an adverb or a particle, while the context does not suffice for absolutely correct disambiguation purposes. Therefore, to avoid multiple tagging that would not be resolved, this unique word has been elevated into a category of its own.
In the same way, the special category of enas includes all uses of the ambiguous word `enas', one of which is that of the indefinite pronoun. It is also a numeral and the indefinite article in Greek.
In the following paragraphs, we present all values for the types of pronouns and the coding relevant to each type in more detail.