PublicShow -- Load RDF data from unknown file-type

Source rdf_guess_format_and_load(+Stream, +Options) is det
Guess the RDF format in Stream and load it. Stream must be a repositional stream. Options are passed to rdf_load/2. In addition, it processed the following options:
Name of the uploaded file.
Source rdf_guess_data_format(+Stream, ?Format)
Guess the format of an RDF file from the actual content. Currently, this seeks for a valid XML document upto the rdf:RDF element before concluding that the file is RDF/XML. Otherwise it assumes that the document is Turtle.
To be done
- Recognise Turtle variations from content