rdf_query

The Resource Description Framework, or 'RDF' is a widely used
data representation model that forms the cornerstone of the
Semantic Web. 'RDF' represents data as a graph rather than
the familiar data table or rectangle of relational databases.
The 'rdflib' package provides a friendly and concise user interface
for performing common tasks on 'RDF' data, such as reading, writing
and converting between the various serializations of 'RDF' data,
including 'rdfxml', 'turtle', 'nquads', 'ntriples', and 'json-ld';
creating new 'RDF' graphs, and performing graph queries using 'SPARQL'.
This package wraps the low level 'redland' R package which
provides direct bindings to the 'redland' C library.  Additionally,
the package supports the newer and more developer friendly
'JSON-LD' format through the 'jsonld' package. The package
interface takes inspiration from the Python 'rdflib' library.

Carl Boettiger

rdflib

Tools to Manipulate and Query Semantic Data

Bryce Mecum

Anna Krystalli

Viktor Senderov

rdf_query function

<dl><dt>rdf</dt>
<dd>an rdf object (e.g. from <code>rdf_parse</code>)</dd>
<dt>query</dt>
<dd>a SPARQL query, as text string</dd>
<dt>data.frame</dt>
<dd>logical, should the results be returned as a data.frame?</dd>
<dt>...</dt>
<dd>additional arguments to a redland initialize-Query</dd></dl>

Arguments

Perform a SPARQL Query — rdf_query

<dl>

<dt>rdf</dt>
<dd>an rdf object (e.g. from <code>rdf_parse</code>)</dd>


<dt>query</dt>
<dd>a SPARQL query, as text string</dd>


<dt>data.frame</dt>
<dd>logical, should the results be returned as a data.frame?</dd>


<dt>...</dt>
<dd>additional arguments to a redland initialize-Query</dd>

</dl>

rdf_query: Perform a SPARQL Query

Description

Usage

Value

Arguments

Examples