Sites can be arranged geographically using regions. A region might represent a continent, country, city, campus, or other area depending on your use case. Regions can be nested recursively to construct a hierarchy. For example, you might define several country regions, and within each of those several state or city regions to which sites are assigned.
The parent region, if any.
The region's name. Must be unique to the parent region, if one is assigned.
A unique URL-friendly identifier. (This value can be used for filtering.)