Guidelines for Creating Extended Elements in the Content Standard for Digital Geospatial Metadata Appendix D Guidelines for Creating Extended Elements in the Content Standard for Digital Geospatial Metadata Extended elements to the Standard may be defined by a data set producer or a user community.
Extended elements are elements outside the Standard, but needed by the data set producer.
If extended elements are created, they must follow the guidelines presented here. See Appendix E for Guidelines on Creating a Profile for the Content Standard for Digital Geospatial Metadata. It should be noted here that metadata capture and exploitation tools need to be updated to adjust to these minor modifications. If a metadata producer does not have the capability to provide online linkage, he or she may list the information in the data set. Every effort should be made to logically organize extended elements within the existing sections and structure.