Aspect, as discussed here, is a 'formal' property of a language.

One might demonstrate their formal properties but what are they actually used for?

On the contrary, it is the formal properties of the device which are commonly given prominence.

It has formal properties similar to those of the Legendre symbol.

And what finally unlocks the secret of a piece may not be a formal property at all.

More precisely, a Consensus protocol must satisfy the four formal properties below.

Greenberg later became well known for examining the formal properties of modern art.

In structuralism, these formal properties are taken at a relatively abstract level.

Some use the circular format simply as a support, while others are interested in the formal and conceptual properties of circles.

Robert Cottingham is also attracted to the formal, visual properties of words.