Insofar as disagreement may in principle regard most of (maybe all) facets of information system ontologies’ [ISOs] debate, it may also produce a plurality of views – sometimes inconsistent with each other – on ISOs’ development and design. This paper analyzes a view that makes the recognition of – and provides a theoretical foundation for – such a plurality of views a trademark: perspectivism (on ISOs). The aim is to show what exactly endorsing perspectivism consists of, and how perspectivism differs (...) from different, competing views. Section 2 introduces the main claims of perspectivism, and remarks that perspectivism mainly deals with ISOs’ development and design. As for ISOs’ development, Sect. 3 considers domain’s partition and systematization, by distinguishing perspectivism from realism and relativism. Section 3 also shows that perspectivism implies some sort of variantism on ISOs’ representational primitives, about which perspectivism may not differ from its rivals. As for the ISOs’ design, Sect. 4 points out that despite perspectivism grants the possibility to use any procedural approach, principle, and ontological language, it is not committed to uphold that all those approaches, principles, and languages are legitimate. Finally, Sect. 5 focuses on both perspectivism’s weaknesses and (theoretical) contribution to ISOs’ debate. (shrink)