úÎÔ‹NoneisLinkAttr tag attr returns  if the attribute attr# of an HTML element with tag name tag% points to an external resource, and  otherwise. So for example isLinkAttr "a" "href" returns  whereas isLinkAttr "a" "class" returns  . Note that  expects both tag and attr% to be in lowercase, so for example isLinkAttr "A" "HREF" returns .A V that contains all combinations of tag names and attributes that correspond to links.  islink-0.1.0.0Text.Html.IsLink isLinkAttr allLinkAttrsghc-prim GHC.TypesTrueFalseunordered-containers-0.2.5.0 Data.HashSetHashSet