[Research lines in nursing: phylosophical and epistemological highlights]

In this paper scientific investigation is explained as related to the Nursing Research Lines and Priorities based on the theory of knowledge application and as tangible to Subjectivity and Objectivity on what relates to the integrated categorical terms in the literature as professional, caring and organizational.

to elucidate philosophical and epistemological highlights in the face of meaningful, essential considerations, in favor of question causalities of interest to Nursing.

the reality approach is founded on the theoretical propositions of Johannes Hessen, with held attention to conceptions of other recognized authors.

one can state the exposition value to clarify substantive aspects and adjective implications, not only of interest to investigation, but just to pinpoint the essential meanings on the subject related to elaborated thesis and dissertations (Marters' and Doctoral).

represents a valuable contribution to better clarify details on knowledge construction and on the subject theme under discussion.