Proposal in progress


A structured collection of Unit Types defining a geographic structure. As a subtype of CodeList it may be used directly to describe a value domain.


Defines a geographic line (minimum of 2 points)


A specific geographic unit of a defined Unit Type. A geographic unit may change its name, composition, or geographic extent over time. This may be tracked by versioning the content of the geographic unit. Normally a new version of a geographic unit would have a geographic (spatial) overlap with its previous version (a city annexing new area). A geographic unit ends when it is no longer a unit of the same unit type.


Used to specify a relationship between one spatial object and another. Includes definition of the spatial object types being related, the spatial relation specification, and the event date.


Geographic classification uses unit, unit type, and collections to provide the basis for describing the geographic structure (unit types) and their individual locations (units) in a manner that supports complex layered hierarchies, changes in name, role, and geographic extent over time, and coding for direct use in value domains and responses. It supports the content of DDI Lifecycle Geographic Structure and Geographic Location.


Simple Collection container (set or bag) that may be unordered or ordered using Member Indicator. This collection type is limited to expressing only unordered sets or bags, and simple sequences. Use when there is a need to limit the organization of the collection to one of these forms of organization


Relation structure of categories within a collection. Allows for the specification of complex relationships among categories.


Member Indicator for use when the member type is restricted to Category.


Relations used to describe the complex structure of a Analytic Metadata Set


Describes the source and target Analytic Metadatum members of the complex relation and specifies the relationship


Subscribe to RSS - Proposal in progress