With the development of computer and network technology, the study of metadata and the standards of metadata have become key research topics in recent years. Metadata design gives us a good tool to help with lexicography. Though it is indispensable for the external metadata of dictionaries, internal metadata design for entry content is even more important. Among these designs, those metadata for heads of character and headwords are still the basic work. These designs provide basic linguistic material and support finishing the work remaining in dictionary compilation. This paper describes a set of metadata of heads of character and headwords with the reference to the Temporary Chinese Dictionary.