This study completes previous works on Basque "genitives" and part-whole relations and intends to improve them. It is widely grounded on attested linguistic data provided by both questionnaires to native speakers and exploration of corpora. Beyond the mere description and classification of uses (mainly according to the properties and nature of part-whole relations), we try to introduce a general characterization of the semantics of the studied genitive markers. In this way we show that the concept of typical configuration (containment, support, integrated landmarks) as well as distinct notions of dependence seem to underlie the distribution of locative and possessive genitives in expressions and utterances expressing part-whole relations.