Geographic COmmon (GCO) extensible markup language is a component of the XML Schema Implementation of Geographic Information Metadata documented in ISO/TS 19139:2007. GCO includes all the definitions of http://www.isotc211.org/2005/gco namespace. The root document of this namespace is the file gco.xsd. This gcoBase.xsd schema provides: 1. tools to handle specific objects like "code lists" and "record"; 2. Some XML types representing that do not follow the general encoding rules. Geographic COmmon (GCO) extensible markup language is a component of the XML Schema Implementation of Geographic Information Metadata documented in ISO/TS 19139:2007. GCO includes all the definitions of http://www.isotc211.org/2005/gco namespace. The root document of this namespace is the file gco.xsd. This basicTypes.xsd schema implements concepts from the "basic types" package of ISO/TS 19103. A TypeName is a LocalName that references either a recordType or object type in some form of schema. The stored value "aName" is the returned value for the "aName()" operation. This is the types name. - For parsing from types (or objects) the parsible name normally uses a "." navigation separator, so that it is of the form [class].[member].[memberOfMember]. ...) A MemberName is a LocalName that references either an attribute slot in a record or recordType or an attribute, operation, or association role in an object instance or type description in some form of schema. The stored value "aName" is the returned value for the "aName()" operation. Use to represent the possible cardinality of a relation. Represented by a set of simple multiplicity ranges. A component of a multiplicity, consisting of an non-negative lower bound, and a potentially infinite upper bound.