una vez

adv. ever, once

(n.) = once, one time
Ex: Common facets are facets that, although only listed once, can be applied anywhere in the citation order. Ex: One time he showed me a photograph in an art book of a woman's bare breasts and said 'Nice tits, uh?'.

= upon + Nombre
Ex: Upon completion of his Peace Corps commitment he served as Chief of the Catalog Department at the Washington University Library in St. Louis, Missouri.

= having + Participio Pasado, have + just + Participio Pasado
Ex: Having proclaimed the merits of pre-coordination in effective and efficient retrieval, the next chapter examines pre-coordinate indexing systems in greater detail. Ex: Having just demolished enumerative classification to some extent in the previous section, it is reasonable to ask how effective menu-based information retrieval systems might be.