rdfproc man page

rdfproc — Redland RDF processor utility

Synopsis

rdfproc [options] store-name command arg...

Example

rdfproc test parse http://planetrdf.com/guide/rss.rdf
rdfproc test print
rdfproc test serialize ntriples

Description

The rdfproc utility allows parsing, querying, manipulating and  serializing of RDF content using the Redland RDF library.   The store-name is a Redland store name, typically a short identifier.  The arguments to command vary and are explained in section Commands below.

Options

rdfproc uses the usual GNU command line syntax, with long options starting with two dashes (`-') if supported by the getopt_long function.  Otherwise the short options are only available.

-h, --help

Show a summary of the options.

-c, --contexts

Use a store with Redland contexts.

-n, --new

Make a new store, overwriting any existing one.

-o, --output FORMAT

Set the output FORMAT for sequences of triples, such as from a search (find command) to a Redland serializer.  Use -h or -o help to see the full list of supported formats.

-p, --password

Read the storage option 'password' from standard input.  Terminated by end of line ('\n') or end of file.  This is equivalent to setting it using -t or --storage-options but does not require exposing the password in the argument list.

-q, --quiet

Suppress informational messages (that go to stderr)

-r, --results FORMAT

Set the query results syntax format. Use -h or -r help to see the full list of query result formats.

The exact list of formats depends on what libraptor(3) was built with but is given correct in the usage message with -h.

-s, --storage TYPE

Set the Redland storage type (default 'hashes'). If environment variable RDFPROC_STORAGE_TYPE is set, the storage type given here will override it. Use -h or -s help to see the full list of query result formats.

-t, --storage-options OPTIONS

Set options for the the Redland storage, default is "hash-type='bdb',dir='.'" to match the default storage "hashes".  For storages types such as 'mysql' that need extra options this would typically be something like "host='hostname',database='dbname',user='abc',password='pass'". If environment variable RDFPROC_STORAGE_OPTIONS is set, the storage options given here will be applied afterwards.

-v, --version

Print the Redland version and exit.

-V, --verbose

Show informational messages on stderr.

Commands

Where a node is allowed, such as NODE, SUBJECT, PREDICATE or OBJECT below, simple heuristics are used to guess which are blank node identifiers, URIs or literals (to add a statement with a literal, use add-typed).  If the item starts with _: then it is assumed to be a blank node identifier, otherwise if it matches something:// it is assumed to be a URI, otherwise it is a literal.  Literals are only allowed as objects of statements and blank nodes are not allowed as predicates.

add SUBJECT PREDICATE OBJECT [CONTEXT]

Add the given triple to graph, in the optional Redland context if the CONTEXT node is given.

add-typed SUBJECT PREDICATE OBJECT OBJECT-LANG OBJECT-URI [CONTEXT]

Add the triple with the datatyped literal object to the graph, in the optional Redland context if CONTEXT is given.

arc SUBJECT OBJECT
arcs SUBJECT OBJECT

Show one node/all nodes that match triples (SUBJECT, ?, OBJECT)

arcs-in NODE

Show all properties of triples with NODE as a subject.

arcs-out NODE

Show all properties of triples with NODE as an object.

contains SUBJECT PREDICATE OBJECT

Check if the given triple is in the graph.

contexts

List all the contexts in the graph (if contexts are enabled).

find SUBJECT|- PREDICATE|- OBJECT|- [CONTEXT]

Find matching triples to the given statement where - stands for a blank that matches any node.  If CONTEXT is given, only search for triples in that context node.

has-arc-in NODE ARC

Check that there is a triple with NODE as a subject and ARC as a predicate.

has-arc-out NODE ARC

Check that there is a triple with NODE as a object and ARC as a predicate.

parse URI|FILENAME [SYNTAX| [BASE URI]]

Parse syntax at URI into the graph using SYNTAX which can be one of rdfxml (RDF/XML, default), ntriples, turtle, rss-tag-soup (for all RSS and Atoms), grddl and guess to use content hints and protocol information to work it out. (This list changes faster than this manual page) If FILENAME is a existing file, the appropriate URI will be generated for it.  If parsing returns errors, the return code will be non-0.

parse-stream URI|FILENAME [SYNTAX [BASE URI [CONTEXT]]

Streaming parse syntax at URI into the graph using SYNTAX which can be one of rdfxml (RDF/XML, default) or ntriples. If FILENAME is an existing file, the appropriate URI will be generated for it.  If the optional CONTEXT URI is given, the triples are added to that context. If parsing returns errors, the return code will be non-0.

print

Print the graph triples in a simple format showing context nodes if present.

query NAME|- URI|- QUERY-STRING

Run QUERY-STRING query in language NAME returning variable bindings, a boolean or RDF graph depending on the query. Query language can be 'sparql' or 'rdql'.

remove SUBJECT PREDICATE OBJECT [CONTEXT]

Remove the given triple graph, in the optional Redland context if CONTEXT is given.

remove-context CONTEXT

Remove all triples in the graph with the Redland context CONTEXT.

serialize [SYNTAX [URI [MIME-TYPE]]]

Serializes the graph to a syntax with a particular ISYNTAX URI or Internet Media Type/MIME Type.  The default is RDF/XML (NAME "rdfxml", MIME Type "application/rdf/xml") if none of the above are given.  Other alternatives are "ntriples" (no MIME Type).

source PREDICATE OBJECT
sources PREDICATE OBJECT

Show one node/all nodes that match triples (?, PREDICATE, OBJECT)

target SUBJECT PREDICATE
targets SUBJECT PREDICATE

Show one node/all nodes that match triples (SUBJECT, PREDICATE, ?)

Environment

RDFPROC_STORAGE_OPTIONS can be set to provide storage options instead of using the option -t, --storage-options Options. When both are given, command options are applied last.

RDFPROC_STORAGE_TYPE can be set to provide a storage type instead of using the option -s, --storage TYPE. When both are given, the storage type from the command is used.

Conforming to

RDF/XML Syntax (Revised), W3C Recommendation, http://www.w3.org/TR/rdf-syntax-grammar/

N-Triples, in RDF Test Cases, Jan Grant and Dave Beckett (eds.) W3C Recommendation, http://www.w3.org/TR/rdf-testcases/#ntriples

See Also

redland(3), libraptor(3), rapper(1)

Author

Dave Beckett - http://www.dajobe.org/

Info

2010-08-29