urc

Hypertext links in HTML (draft)

      URC
         The URC relationship identifies a Uniform Resource Catalogue
         for the current document.

         This keyword has been proposed by Dave Raggett.  Its meaning
         and purpose have not been explained to the author, but a
         placeholder is being maintained until such time as Dave has had
         an opportunity  provide explanation, examples,
         discussion and justification.

[引用： 4.4f. Other REL and REV Values Under Discussion -- Hypertext links in HTML (draft) より]