Used if time of day information is included in the metadata for a data set. These include any access constraints applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations on obtaining the metadata. These include any metadata use constraints applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations on using the metadata.
Extended elements are elements outside the Standard, but needed by the metadata producer.
If extended elements are created, they must follow the guidelines in Appendix D, Guidelines for Creating Extended Elements to the Content Standard for Digital Geospatial Metadata. Entries should follow the Uniform Resource Locator convention of the Internet.