List of values on a uniform nominal scale. List of text tokens. In a list context a token should not include any spaces, so xsd:Name is used instead of xsd:string. A member of the list may be a typed null. If a codeSpace attribute is present, then its value is a reference to a Reference System for the value, a dictionary or code list.
<complexType name="CodeOrNullListType"><annotation><documentation>List of values on a uniform nominal scale. List of text tokens. In a list context a token should not include any spaces, so xsd:Name is used instead of xsd:string. A member of the list may be a typed null. If a codeSpace attribute is present, then its value is a reference to a Reference System for the value, a dictionary or code list.</documentation></annotation><simpleContent><extension base="gml:NameOrNullList"><attribute name="codeSpace" type="anyURI" use="optional"/></extension></simpleContent></complexType>