http://schemas.opengis.net/csw/3.0/cswGetDomain.xsd
This schema defines the request and response messages for the CSW 3.0
GetDomain operation.
Returns the set of supported possible values
for the specified data component.
Returns the set of available values for the
specified data component. This is typically
a subset of the list of possible values.
Returns the actual values for some property. In general this is
a subset of the value domain (that is, set of permissible values),
although in some cases these may be the same.