Issue relations are meant to be the basic infrastructure to build on (at least that is how I meant it when I posted the original feature request). Just like the labels are just a binary relation between a issue and a "label", the relations should be just a ternary relation between two issues and a "label". Then you can build issue task lists on top of the relations like you've built issue boards on top of the labels.

The words type, concept, property, quality, feature and attribute (all used in describing things) tend to be used with different verbs. E.g. Suppose a rose bush is defined as a plant that is "thorny", "flowering" and "bushy". You might say a rose bush instantiates these three types, or embodies these three concepts, or exhibits these three properties, or possesses these three qualities, features or attributes.

'female' + 'performer' = 'actress'

An individual semantic feature constitutes one component of a word's intention, which is the inherent sense or concept evoked.

The semantic features of a word can be notated using a binary feature notation common to the framework of componential analysis.[11] A semantic property is specified in square brackets and a plus or minus sign indicates the existence or non-existence of that property.

A semantic class contains words that share a semantic feature.

Semantic classes may intersect. The intersection of female and young can be girl.