NAME
Redland Resource Description Framework (RDF) Library
VERSION
1.0.3
SYNOPSIS
#include <redland.h>
DESCRIPTION
redland is a library providing support for the Resource Description
Framework (RDF) written in ANSI C with APIs in several other languages.
This manual page lists most of the redland public API functions but
does not claim to be a complete summary of the entire API. For the
complete API with full details of the function interface, see the HTML
API documentation either on the Redland web site at
<http://librdf.org/> or with the software release in the docs/api
directory.
FUNCTIONS
The functions defined by redland are all defined with the "librdf_"
prefix
class world
librdf_world* librdf_new_world(void)
void librdf_free_world(librdf_world* world)
void librdf_world_open(librdf_world* world)
void librdf_world_set_error(librdf_world* world, void* user_data, void
(*error_fn)(void* user_data, const char* msg, ...))
void librdf_world_set_warning(librdf_world* world, void* user_data,
void (*warning_fn)(void* user_data, const char* msg, ...))
void librdf_world_set_digest(librdf_world*, const char* name)
void librdf_world_set_uris_hash(librdf_world* world, librdf_hash*
uris_hash)
const char* librdf_world_get_feature(librdf_world* world, librdf_uri*
feature)
int librdf_world_set_feature(librdf_world* world, librdf_uri* feature,
const char* value)
class iterator
librdf_iterator* librdf_new_iterator(librdf_world* world, void*
context, int (*is_end)(void*), void* (*get_next)(void*), void
(*finished)(void*))
void librdf_free_iterator(librdf_iterator*)
int librdf_iterator_end(librdf_iterator* iterator)
int librdf_iterator_finished(librdf_iterator* iterator)
int librdf_iterator_next(librdf_iterator* iterator)
void* librdf_iterator_get_object(librdf_iterator* iterator)
void* librdf_iterator_get_context(librdf_iterator* iterator)
void* librdf_iterator_get_key(librdf_iterator* iterator)
void* librdf_iterator_get_value(librdf_iterator* iterator)
int librdf_iterator_add_map(librdf_iterator* iterator, void*
(*fn)(void* context, void* item), void* context)
void* librdf_iterator_map_remove_duplicate_nodes(void* item, void*
user_data)
class digest
void librdf_digest_register_factory(librdf_world* world, const char*
name, void (*factory) (librdf_digest_factory*))
librdf_digest_factory* librdf_get_digest_factory(librdf_world* world,
const char* name)
librdf_digest* librdf_new_digest(librdf_world* world, char* name)
librdf_digest* librdf_new_digest_from_factory(librdf_world* world,
librdf_digest_factory* factory)
void librdf_free_digest(librdf_digest* digest)
void librdf_digest_init(librdf_digest* digest)
void librdf_digest_update(librdf_digest* digest, unsigned char* buf,
size_t length)
void librdf_digest_final(librdf_digest* digest)
void* librdf_digest_get_digest(librdf_digest* digest)
char* librdf_digest_to_string(librdf_digest* digest)
void librdf_digest_print(librdf_digest* digest, FILE* fh)
class uri
librdf_uri* librdf_new_uri(librdf_world* world, const unsigned char *
string)
librdf_uri* librdf_new_uri_from_uri(librdf_uri* uri)
librdf_uri* librdf_new_uri_from_uri_local_name(librdf_uri* uri, const
unsigned char* local_name)
void librdf_free_uri(librdf_uri* uri)
unsigned char* librdf_uri_as_string(librdf_uri* uri)
unsigned char* librdf_uri_as_counted_string(librdf_uri* uri, size_t*
len_p)
librdf_digest* librdf_uri_get_digest(librdf_uri* uri)
void librdf_uri_print>(librdf_uri* uri, FILE* fh)
unsigned char* librdf_uri_to_string(librdf_uri* uri)
unsigned char* librdf_uri_to_counted_string(librdf_uri* uri, size_t*
len_p)
int librdf_uri_equals(librdf_uri* first_uri, librdf_uri* second_uri)
int librdf_uri_is_file_uri(librdf_uri* uri)
const char* librdf_uri_to_filename(librdf_uri* uri)
librdf_uri* librdf_new_uri_normalised_to_base(const unsigned char*
uri_string, librdf_uri* source_uri, librdf_uri* base_uri)
librdf_uri* librdf_new_uri_relative_to_base(librdf_uri* base_uri, const
unsigned char* uri_string)
librdf_uri* librdf_new_uri_from_filename(librdf_world* world, const
char* filename)
class node
librdf_node* librdf_new_node(librdf_world* world)
librdf_node* librdf_new_node_from_uri_string(librdf_world* world, const
char* string)
librdf_node* librdf_new_node_from_uri(librdf_world* world, librdf_uri*
uri)
librdf_node* librdf_new_node_from_uri_local_name(librdf_world* world,
librdf_uri* uri, const char* local_name)
librdf_node* librdf_new_node_from_normalised_uri_string(librdf_world*
world, const char* uri_string, librdf_uri* source_uri, librdf_uri*
base_uri)
librdf_node* librdf_new_node_from_literal(librdf_world* world, const
char* string, const char* xml_language, int xml_space, int is_wf_xml)
librdf_node* librdf_new_node_from_typed_literal(librdf_world* world,
const unsigned char* string, const char* xml_language, librdf_uri*
datatype_uri)
librdf_node* librdf_new_node_from_blank_identifier(librdf_world* world,
const unsigned char* identifier)
librdf_node* librdf_new_node_from_node(librdf_node* node)
void librdf_node_init(librdf_world* world, librdf_node* node)
void librdf_free_node(librdf_node* r)
librdf_uri* librdf_node_get_uri(librdf_node* node)
librdf_node_type librdf_node_get_type(librdf_node* node)
unsigned char* librdf_node_get_literal_value(librdf_node* node)
unsigned char*
librdf_node_get_literal_value_as_counted_string(librdf_node* node,
size_t* len_p)
char* librdf_node_get_literal_value_as_latin1(librdf_node* node)
char* librdf_node_get_literal_value_language(librdf_node* node)
int librdf_node_get_literal_value_is_wf_xml(librdf_node* node)
librdf_uri* librdf_node_get_literal_value_datatype_uri(librdf_node*
node)
int librdf_node_get_li_ordinal(librdf_node* node)
unsigned char* librdf_node_get_blank_identifier(librdf_node* node)
int librdf_node_is_resource(librdf_node* node)
int librdf_node_is_literal(librdf_node* node)
int librdf_node_is_blank(librdf_node* node)
librdf_digest* librdf_node_get_digest(librdf_node* node)
size_t librdf_node_encode(librdf_node* node, unsigned char* buffer,
size_t length)
size_t librdf_node_decode(librdf_node* node, unsigned char* buffer,
size_t length)
unsigned char* librdf_node_to_string(librdf_node* node)
unsigned char* librdf_node_to_counted_string(librdf_node* node, size_t*
len_p)
void librdf_node_print(librdf_node* node, FILE* fh)
int librdf_node_equals(librdf_node* first_node, librdf_node*
second_node)
class concepts
The library provides macros for all of the RDF and RDFS concepts -
nodes and URIs. For example, "LIBRDF_MS_Alt" for the librdf_node for
the rdf:Alt concept and "LIBRDF_MS_Alt_URI" for the librdf_uri for the
URI reference of rdf:Alt.
"LIBRDF_URI_RDF_MS" and "LIBRDF_URI_RDF_SCHEMA" provide the librdf_uri
objects for the RDF and RDFS namespace URIs. They must be copied using
librdf_new_uri_from_uri to be shared correctly.
void librdf_get_concept_by_name(librdf_world* world, int is_ms, const
char* name, librdf_uri **uri_p, librdf_node **node_p)
class statement
librdf_statement* librdf_new_statement(librdf_world* world)
librdf_statement* librdf_new_statement_from_statement(librdf_statement*
statement)
librdf_statement* librdf_new_statement_from_nodes(librdf_world* world,
librdf_node* subject, librdf_node* predicate, librdf_node* object)
void librdf_statement_init(librdf_world* world, librdf_statement*
statement)
void librdf_statement_clear(librdf_statement* statement)
void librdf_free_statement(librdf_statement* statement)
librdf_node* librdf_statement_get_subject(librdf_statement* statement)
void librdf_statement_set_subject(librdf_statement* statement,
librdf_node* subject)
librdf_node* librdf_statement_get_predicate(librdf_statement*
statement)
void librdf_statement_set_predicate(librdf_statement* statement,
librdf_node* predicate)
librdf_node* librdf_statement_get_object(librdf_statement* statement)
void librdf_statement_set_object(librdf_statement* statement,
librdf_node* object)
int librdf_statement_is_complete(librdf_statement* statement)
char* librdf_statement_to_string(librdf_statement* statement)
void librdf_statement_print(librdf_statement* statement, FILE* fh)
int librdf_statement_equals(librdf_statement* statement1,
librdf_statement* statement2)
int librdf_statement_match(librdf_statement* statement,
librdf_statement* partial_statement)
size_t librdf_statement_encode(librdf_statement* statement, unsigned
char* buffer, size_t length)
size_t librdf_statement_encode_parts(librdf_statement* statement,
unsigned char* buffer, size_t length, librdf_statement_part fields)
size_t librdf_statement_decode(librdf_statement* statement, unsigned
char* buffer, size_t length)
size_t librdf_statement_decode_parts(librdf_statement* statement,
librdf_node** context_node, unsigned char* buffer, size_t length)
class model
librdf_model* librdf_new_model(librdf_world* world, librdf_storage*
storage, char* options_string)
librdf_model* librdf_new_model_with_options(librdf_world* world,
librdf_storage* storage, librdf_hash* options)
librdf_model* librdf_new_model_from_model(librdf_model* model)
void librdf_free_model(librdf_model* model)
int librdf_model_size(librdf_model* model)
int librdf_model_add(librdf_model* model, librdf_node* subject,
librdf_node* predicate, librdf_node* object)
int librdf_model_add_string_literal_statement(librdf_model* model,
librdf_node* subject, librdf_node* predicate, char* string, char*
xml_language, int xml_space, int is_wf_xml)
int librdf_model_add_typed_literal_statement(librdf_model* model,
librdf_node* subject, librdf_node* predicate, const unsigned char*
string, char* xml_language, librdf_uri* datatype_uri)
int librdf_model_add_statement(librdf_model* model, librdf_statement*
statement)
int librdf_model_add_statements(librdf_model* model, librdf_stream*
statement_stream)
int librdf_model_remove_statement(librdf_model* model,
librdf_statement* statement)
int librdf_model_contains_statement(librdf_model* model,
librdf_statement* statement)
int librdf_model_has_arc_in(librdf_model* model, librdf_node* node,
librdf_node* property)
int librdf_model_has_arc_out(librdf_model* model, librdf_node* node,
librdf_node* property)
librdf_stream* librdf_model_as_stream(librdf_model* model)
librdf_stream* librdf_model_find_statements(librdf_model* model,
librdf_statement* statement)
librdf_stream* librdf_model_find_statements_in_context(librdf_model*
model, librdf_statement* statement, librdf_node* context_node)
librdf_stream* librdf_model_find_statements_with_options(librdf_model*
model, librdf_statement* statement, librdf_node* context_node,
librdf_hash* options)
librdf_iterator* librdf_model_get_contexts(librdf_model* model)
librdf_iterator* librdf_model_get_sources(librdf_model* model,
librdf_node* arc, librdf_node* target)
librdf_iterator* librdf_model_get_arcs(librdf_model* model,
librdf_node* source, librdf_node* target)
librdf_iterator* librdf_model_get_targets(librdf_model* model,
librdf_node* source, librdf_node* arc)
librdf_node* librdf_model_get_source(librdf_model* model, librdf_node*
arc, librdf_node* target)
librdf_node* librdf_model_get_arc(librdf_model* model, librdf_node*
source, librdf_node* target)
librdf_node* librdf_model_get_target(librdf_model* model, librdf_node*
source, librdf_node* arc)
librdf_iterator* librdf_model_get_arcs_in(librdf_model* model,
librdf_node* node)
librdf_iterator* librdf_model_get_arcs_out(librdf_model* model,
librdf_node* node)
int librdf_model_add_submodel(librdf_model* model, librdf_model*
sub_model)
int librdf_model_remove_submodel(librdf_model* model, librdf_model*
sub_model)
void librdf_model_print(librdf_model* model, FILE* fh)
int librdf_model_context_add_statement(librdf_model* model,
librdf_node* context, librdf_statement* statement)
int librdf_model_context_add_statements(librdf_model* model,
librdf_node* context, librdf_stream* stream)
int librdf_model_context_remove_statement(librdf_model* model,
librdf_node* context, librdf_statement* statement)
int librdf_model_context_remove_statements(librdf_model* model,
librdf_node* context)
librdf_stream* librdf_model_context_as_stream(librdf_model* model,
librdf_node* context)
librdf_stream* librdf_model_query(librdf_model* model, librdf_query*
query)
librdf_stream* librdf_model_query_string(librdf_model* model, const
char* name, librdf_uri* uri, const unsigned char* query_string)
void librdf_model_sync(librdf_model* model)
librdf_storage* librdf_model_get_storage(librdf_model* model)
librdf_node* librdf_model_get_feature(librdf_model* model, librdf_uri*
feature) =item int librdf_model_set_feature(librdf_model* model,
librdf_uri* feature, librdf_node* value)
class storage
void librdf_storage_register_factory(const char* name, void (*factory)
(librdf_storage_factory*))
librdf_storage* librdf_new_storage(librdf_world* world, char*
storage_name, char* name, char* options_string)
librdf_storage* librdf_new_storage_with_options(librdf_world* world,
char* storage_name, char* name, librdf_hash* options)
librdf_storage* librdf_new_storage_from_storage(librdf_storage*
old_storage)
librdf_storage* librdf_new_storage_from_factory(librdf_world* world,
librdf_storage_factory* factory, char* name, librdf_hash* options)
void librdf_free_storage(librdf_storage* storage)
int librdf_storage_open(librdf_storage* storage, librdf_model* model)
int librdf_storage_close(librdf_storage* storage)
int librdf_storage_get(librdf_storage* storage, void* key, size_t
key_len, void **value, size_t* value_len, unsigned int flags)
int librdf_storage_size(librdf_storage* storage)
int librdf_storage_add_statement(librdf_storage* storage,
librdf_statement* statement)
int librdf_storage_add_statements(librdf_storage* storage,
librdf_stream* statement_stream)
int librdf_storage_remove_statement(librdf_storage* storage,
librdf_statement* statement)
int librdf_storage_contains_statement(librdf_storage* storage,
librdf_statement* statement)
librdf_stream* librdf_storage_serialise(librdf_storage* storage)
librdf_stream* librdf_storage_find_statements(librdf_storage* storage,
librdf_statement* statement)
librdf_iterator* librdf_storage_get_sources(librdf_storage* storage,
librdf_node* arc, librdf_node* target)
librdf_iterator* librdf_storage_get_arcs(librdf_storage* storage,
librdf_node* source, librdf_node* target)
librdf_iterator* librdf_storage_get_targets(librdf_storage* storage,
librdf_node* source, librdf_node* arc)
librdf_iterator* librdf_storage_get_arcs_in(librdf_storage* storage,
librdf_node* node)
librdf_iterator* librdf_storage_get_arcs_out(librdf_storage* storage,
librdf_node* node)
int librdf_storage_has_arc_in(librdf_storage* storage, librdf_node*
node, librdf_node* property)
int librdf_storage_has_arc_out(librdf_storage* storage, librdf_node*
node, librdf_node* property)
int librdf_storage_context_add_statement(librdf_storage* storage,
librdf_node* context, librdf_statement* statement)
int librdf_storage_context_add_statements(librdf_storage* storage,
librdf_node* context, librdf_stream* stream)
int librdf_storage_context_remove_statement(librdf_storage* storage,
librdf_node* context, librdf_statement* statement)
int librdf_storage_context_remove_statements(librdf_storage* storage,
librdf_node* context)
librdf_stream* librdf_storage_context_as_stream(librdf_storage*
storage, librdf_node* context)
int librdf_storage_supports_query(librdf_storage* storage,
librdf_query* query)
librdf_stream* librdf_storage_query(librdf_storage* storage,
librdf_query* query)
void librdf_storage_sync(librdf_storage* storage)
class parser
void librdf_parser_register_factory(librdf_world* world, const char*
name, const char* mime_type, const char* uri_string, void (*factory)
(librdf_parser_factory*))
librdf_parser* librdf_new_parser(librdf_world* world, const char* name,
const char* mime_type, librdf_uri* type_uri)
librdf_parser* librdf_new_parser_from_factory(librdf_world* world,
librdf_parser_factory* factory)
void librdf_free_parser(librdf_parser* parser)
librdf_stream* librdf_parser_parse_as_stream(librdf_parser* parser,
librdf_uri* uri, librdf_uri* base_uri)
int librdf_parser_parse_into_model(librdf_parser* parser, librdf_uri*
uri, librdf_uri* base_uri, librdf_model* model)
librdf_stream* librdf_parser_parse_string_as_stream(librdf_parser*
parser, const unsigned char* string, librdf_uri* base_uri)
int librdf_parser_parse_string_into_model(librdf_parser* parser, const
unsigned char* string, librdf_uri* base_uri, librdf_model* model)
void librdf_parser_set_error(librdf_parser* parser, void* user_data,
void (*error_fn)(void* user_data, const char* msg, ...))
void librdf_parser_set_warning(librdf_parser* parser, void* user_data,
void (*warning_fn)(void* user_data, const char* msg, ...))
librdf_node* librdf_parser_get_feature(librdf_parser* parser,
librdf_uri* feature)
int librdf_parser_set_feature(librdf_parser* parser, librdf_uri*
feature, librdf_node* value)
class serializer
librdf_serializer* librdf_new_serializer(librdf_world* world, const
char *name, const char *mime_type, librdf_uri *type_uri)
librdf_serializer* librdf_new_serializer_from_factory(librdf_world*
world, librdf_serializer_factory *factory)
void librdf_free_serializer(librdf_serializer *serializer)
int librdf_serializer_serialize_model(librdf_serializer* serializer,
FILE* handle, librdf_uri* base_uri, librdf_model* model)
int librdf_serializer_serialize_model_to_file(librdf_serializer*
serializer, const char *name, librdf_uri* base_uri, librdf_model*
model)
void librdf_serializer_set_error(librdf_serializer* serializer, void
*user_data, void (*error_fn)(void *user_data, const char *msg, ...))
void librdf_serializer_set_warning(librdf_serializer* serializer, void
*user_data, void (*warning_fn)(void *user_data, const char *msg, ...))
librdf_node* librdf_serializer_get_feature(librdf_serializer*
serializer, librdf_uri* feature)
int librdf_serializer_set_feature(librdf_serializer* serializer,
librdf_uri* feature, librdf_node* value)b
int librdf_serializer_set_namespace(librdf_serializer* serializer,
librdf_uri* uri, const char* prefix)
class stream
librdf_stream* librdf_new_stream(librdf_world* world, void* context,
int (*end_of_stream)(void*), librdf_statement*
(*next_statement)(void*), void (*finished)(void*))
librdf_stream* librdf_new_stream_from_node_iterator(librdf_iterator*
iterator, librdf_statement* statement, librdf_statement_part field)
void librdf_free_stream(librdf_stream* stream)
int librdf_stream_end(librdf_stream* stream)
int librdf_stream_next(librdf_stream* stream)
librdf_statement* librdf_stream_get_object(librdf_stream* stream)
void* librdf_stream_get_context(librdf_stream* stream)
void librdf_stream_set_map(librdf_stream* stream, librdf_statement*
(*map)(void* context, librdf_statement* statement), void* map_context)
void librdf_stream_print(librdf_stream* stream, FILE* fh)
EXAMPLES
#include <redland.h>
librdf_storage *storage;
librdf_model* model;
librdf_statement* statement;
librdf_world* world
world=librdf_new_world();
librdf_world_open(world);
storage=librdf_new_storage(world, "hashes", "test", "hash-type=’bdb’,dir=’.’");
model=librdf_new_model(world, storage, NULL);
statement=librdf_new_statement_from_nodes(world, librdf_new_node_from_uri_string(world, "http://purl.org/net/dajobe/"), librdf_new_node_from_uri_string(world, "http://purl.org/dc/elements/1.1/creator"), librdf_new_node_from_literal(world, "Dave Beckett", NULL, 0));
librdf_model_add_statement(model, statement);
librdf_free_statement(statement);
librdf_model_print(model, stdout);
librdf_free_model(model);
librdf_free_storage(storage);
librdf_free_world(world);
SEE ALSO
libraptor(3), libxml(4).
HISTORY
The redland RDF library was created by Dave Beckett in June 2000.
AUTHOR
Dave Beckett <http://purl.org/net/dajobe/>,