grafter-2.rdf4j.formats — grafter 2.1.12

Symbols used to specify different Linked Data Serializations.

Includes functions to coerce formats from clojure keywords / file extension strings into their underlying RDF4j RDFFormat object.

Supported format keywords are:

:brf :json :n3 :nq :nt :rdf (also :owl :rdfs :xml) :rj :trig :trix :ttl

->rdf-format clj multimethod

Extensible multi-method that coerces mime-type strings, or strings or keys representing file extensions for RDF types into RDFFormat objects for use with Sesame.

e.g. it can coerce :nt, "nt" or "application/n-triples" into the appropriate RDFFormat object.

filename->rdf-format clj

(filename->rdf-format fname)

Given a filename we attempt to return an appropriate RDFFormat object based on the files extension.

mimetype->rdf-format clj multimethod

Extensible multimethod that accepts a mime-type string and returns the appropriate sesame RDFFormat object.

NOTE: the ->rdf-format function also uses this, and supports both mime-types and file extensions.

select-input-coercer clj

(select-input-coercer fmt)

Depending on whether the format is text or binary returns either a Reader or an InputStream.

select-output-coercer clj

(select-output-coercer fmt)

Depending on whether the format is text or binary returns either a Writer or an OutputStream.

url->rdf-format clj

(url->rdf-format url)

Parse a URL for the file extension of its last path segment, ignoring query string and other URL parts.