- url_cached(?URL, ?Property) is nondet
- url_cached(+Dir, ?URL, ?Property) is nondet
- True if URL is in the cache represented by the directory Dir and
has Property. Defined properties are:
- file(-File)
- File is the cache-file for the given URL
- mime_type(-Mime)
- Mime is the mime-type of the URL as reported by the server
- fetched(-Stamp:integer)
- Timestamp that specifies when the URL was fetched
- last_modified(-Modified:atom)
- If present, this is the modification time as provided by the server.