DokuWiki adds this attribute to "a" interwikis automatically, it points to the namespace/pageID, e.g. "doku.php?id=3cx:add_phones" the value of data-wiki-id attr is "3cx:add_phones". On Read the Dokus template, this attribute is used on sidebar to determine the "Next" and "Previous" buttons location.
DokuWiki adds this attribute to "a" interwikis automatically, it points to the namespace/pageID, e.g. "doku.php?id=3cx:add_phones" the value of data-wiki-id attr is "3cx:add_phones". On Read the Dokus template, this attribute is used on sidebar to determine the "Next" and "Previous" buttons location.