They then developed an algorithm that examines several objective features of a perceived friendship (that is, the number of common friends or the total number of friends) and is able to distinguish between the two different kinds of friendship: unidirectional or reciprocal. (sciencedaily.com)
Later he reasoned that these event - particles should have subjective features as well as objective features — viz., actual occasions. (religion-online.org)
Includes additional riders and features that allow for customization to meet your objectives (globalatlantic.com)