there's no dcat:format

[VladimirAlexiev]

Sec 6.5.1 gives the following example:

:chembl17rdf 
    a dctypes:Dataset, void:Dataset ;
    dcat:format "text/turtle" ;
    dcat:format <http://www.w3.org/ns/formats/Turtle> ;
    dcat:format "application/gzip" .

1. I think that should be also dcat:Distribution
2. There's no property dcat:format. You can use something like:

:chembl17rdf 
    a dctypes:Dataset, void:Dataset ;
    dc:format "text/turtle" ;
    dcat:mediaType  <http://purl.org/NET/mediatypes/text/turtle>;
    dct:format <http://www.w3.org/ns/formats/Turtle> ;
    dc:format "application/gzip" .
    dcat:mediaType  <http://purl.org/NET/mediatypes/application/gzip>;

(Note: dcat:mediaType is a subprop of dct:format. You can use that, or directly dct:format)

[KimJBaran]

Might be a namespace error.

References to check:

• http://www.w3.org/TR/vocab-dcat/#Property:distribution_format
• http://dublincore.org/documents/2012/06/14/dcmi-terms/?v=terms#format

[micheldumontier]

should be dct:format