Validator fetches only the HTTP header for the availability of the resource

[csarven]

One of the preliminary assessments checks for the availability of a resource. I think the validator is only checking for the head in its request as opposed to retrieving the full resource.

Example resource: http://imf.270a.info/dataset/PGI
Availability: Could not use method HEAD to test availability.
Interpretability: Response claims to be in a format (text/html) which is different from the format informed in CKAN (application/rdf+xml). Typo?

See:
curl -sI http://imf.270a.info/dataset/PGI
vs.
curl -LH "Accept: application/rdf+xml" http://imf.270a.info/dataset/PGI