grafter.rdf.protocols — grafter 0.11.6

Grafter protocols and types for RDF processing

IDatatypeURI clj protocol

datatype-uri clj

(datatype-uri this)

Returns the RDF literals datatype URI as a java.net.URI.

IRawValue clj protocol

raw-value clj

(raw-value this)

Returns the naked value of a literal. For native primitive values e.g. a java.lang.Integer, this will return the supplied value (like identity). However for more complex types such as LangString's it will coerce the value into a more natural primitive type.

IRDFString clj protocol

lang clj

(lang this)

Return the strings language tag (as a clojure Keyword)

ISPARQLable clj protocol

NOTE this protocol is intended for low-level access. End users should use query instead.

Run an arbitrary SPARQL query. Works with ASK, DESCRIBE, CONSTRUCT and SELECT queries.

You can call this on a Repository however if you do you may in some cases cause a resource leak, for example if the sequence of results isn't fully consumed.

To use this without leaking resources it is recommended that you call ->connection on your repository, inside a with-open; and then consume all your results inside of a nested doseq/dorun/etc...

e.g.

(with-open [conn (->connection repo)]
   (doseq [res (query conn "SELECT * WHERE { ?s ?p ?o .}")]
      (println res)))

query-dataset clj

(query-dataset this sparql-string model)

ISPARQLUpdateable clj protocol

update! clj

(update! this sparql-string)

Issue a SPARQL Update statement against the repository

IStatement clj protocol

An RDF triple or quad

context clj

(context statement)

object clj

(object statement)

predicate clj

(predicate statement)

subject clj

(subject statement)

ITransactable clj protocol

Low level protocol for transactions support. Most users probably want to use grafter.rdf.sesame/with-transaction

begin clj

(begin repo)

Start a transaction

commit clj

(commit repo)

Commit a transaction

rollback clj

(rollback repo)

Rollback a transaction

ITripleDeleteable clj protocol

This protocol can be implemented by anything which you can delete statements from. For example a SPARQL Update Endpoint.

delete clj

(delete this quads)

(delete this graph triples)

Delete the supplied triples or quads from the destination.

delete-statement clj

(delete-statement this statement)

(delete-statement this graph statement)

ITripleReadable clj protocol

Use the higher level wrapper function statements if you just wish to read in some RDF.

This protocol exists for implementers to hook in additional sources of statements.

Takes a source of statements or triples and converts it into a seq of triples.

A hash of options is passed to each implementation, they may be ignored or handled depending on the circumstance.

to-statements clj

(to-statements this options)

ITripleWriteable clj protocol

This protocol is implemented by anything which you can put statements into.

add clj

(add this quads)

(add this graph triples)

(add this graph format triple-stream)

(add this graph base-uri format triple-stream)

Add a seq of triples or quads to a destination. Works with a sequence of IStatements an InputStream, File or Reader

add-statement clj

(add-statement this statement)

(add-statement this graph statement)

rdf:langString clj

triple? clj

(triple? t)

Predicate function to test if object is a valid RDF triple.