Sorry if this is not the proper location to submit the issue, but I didn't found a fork of https://github.com/perma-id/w3id.org/ in the adlnet org to submit there.

Reviewing the xAPI profile structure: profile properties section of the spec I realized that following the link https://w3id.org/xapi/profiles#1.0 included in the conformsTo attribute, does not redirect to https://adlnet.github.io/xapi-profiles/#1.0, but instead shows the empty content of https://w3id.org/xapi/profiles directory.

The problems seems to be related to https://github.com/perma-id/w3id.org/blob/master/xapi/profiles/.htaccess#L34. My understanding is that the hash / fragment part is never seen by the server so the pattern never matches. I've tried locally the following directive and it works:

# xAPI PROFILE SPEC VERSION
# ---------------------------------------------
# Ontology Rewrite rule to serve HTML content from the URI if requested
RewriteCond %{HTTP_ACCEPT} !application/rdf\+xml.*(text/html|application/xhtml\+xml)
RewriteCond %{HTTP_ACCEPT} text/html [OR]
RewriteCond %{HTTP_ACCEPT} application/xhtml\+xml [OR]
RewriteCond %{HTTP_USER_AGENT} ^Mozilla/.*
# Match the empty uri
RewriteRule ^$ https://adlnet.github.io/xapi-profiles [R=303]