Spatial Classifications

Spatial Classifications
There are several different tiers of organization for spatial expanses. The size chain, from largest to smallest, is as follows:

Multiverse: This is the largest and most comprehensive division. The Multiverse refers to everything that exists, everything to have existed, yet to exist, or could exist.

Universe: A universe is a step down. A universe is composed of one or more (typically three or four) Realm Clusters.

Realm Cluster: A Realm Cluster is a relatively tightly-packed group of Realms that may (or may not) display similar or near-identical characteristics. A Realm Cluster's density is mostly random, and Realm spacing can vary from tens of thousands of kilometers to just a few hundred feet.

Realm: A Realm can be treated much like a country in its diversity and separation from other Realms, but not in size or government. Entirely separate Realms are likely to not be very similar, but those within the same Cluster are extremely likely to share at least a handful of key characteristics. However, regardless of affiliation with Clusters, Realms each are very diverse in their uniqueness and special qualities. They too range greatly in size, like countries. They can range from only a few yards each way to several thousand square kilometers.

Dimension: A Dimension is a bit different than other classes. Instead of being defined by matter contained within a certain location or area, Dimensions run like thin vertical strips (or, more accurately, slices) through the Multiverse, some only yards across (though of course there are others that are much larger). Therefore, depending on the placement of Realms, it is possible for Realms to occupy two or more Dimensions at once, or for multiple Realms to occupy the same Dimension simultaneously. Because of the fixed nature of the Dimensions, it is within these that a system of coordinates has been established for communication, transport, and mapping.

Location Designation
The universally accepted format for transmitting an exact location within the Multiverse looks like this:

U[Universe designate number, not often used as transuniversal communication is rare], R[Realm designate number, independent of Cluster classification], D[Dimension coordinates]. For example, a specific point in the Ricefields (say perhaps, a particular village) would look like this:

U[1], R[0], D[8.28113]