To stand within two other elements. The relationship draws a comparison of the three, however the elements do not have to be the same or similar. Nonetheless, the temporal or spatial relationship brings a meaning or definition to the group.
Before
To place ahead in time or space. That placed in front of the other or others may be like those, however similarities are not required in this relationship. In fact, the separation of the elements defines a break or separation between the entities.
As
To act in the same manner or substitute for another. The similarity between the two elements allows interchangeability, however the two are not necessarily the same. One may be a stand-in for the other with both having different definitions.
Owing To
To produce a condition or entity through the operation on or by another. That produced cannot exist wholly separate to the other without defining it relative to that other.
Outside Of
To exist beyond the boundary or limit of another. The definition of this element does not need to be similar or different to the bounded other, however an understanding can be drawn by the relation of the one to the other.
On Board
To stand on or in an object with a defined level or plane that is separated by elevation or composition from another or other elements. This relationship implies inclusion and connection.
Instead Of
To use one in place of another as a substitute or improvement. The two must be similar or the same in that way that they can replace one another, however they might not be similar in any other way.
In Front Of
To stand or be ahead of others, most likely all facing or progressing in the same direction. This relationship describes the entity ahead as leading or directing the others.
In Addition To
To place an element with or above another or other elements to describe that entity as beyond or other than the elements it is grouped with. This provides a contrast first, and a comparison second.
Forward Of
To be ahead of another or others, where the entities ahead are experienced before the others, whether in time or space. This relationship can provide a disadvantage to those that are behind, and there is not a necessary shared meaning or description.