]> Data Graphs 3 RASQAL Library Data Graphs RDF graph sources for triples. rasqal_data_graph; rasqal_data_graph* rasqal_new_data_graph (raptor_uri *uri, raptor_uri *name_uri, int flags); void rasqal_free_data_graph (rasqal_data_graph *dg); enum rasqal_data_graph_flags; void rasqal_data_graph_print (rasqal_data_graph *dg, FILE *fh); Data graphs are used in the query to describe RDF graphs that can be used to query against. The graphs can be used either with raptor_uri to name the graph, or without a name. The query language determines which graphs are used in the query. rasqal_data_graphtypedef struct { raptor_uri* uri; raptor_uri* name_uri; int flags; } rasqal_data_graph; A source of RDF data for querying. The uri is the original source (base URI) of the content. It may also have an additional name name_uri as long as flags is RASQAL_DATA_NAMED raptor_uri *uri; source URI raptor_uri *name_uri; name of graph for RASQAL_DATA_NAMED int flags; RASQAL_DATA_GRAPH_NAMED or RASQAL_DATA_GRAPH_BACKGROUND rasqal_new_data_graphrasqal_data_graph* rasqal_new_data_graph (raptor_uri *uri, raptor_uri *name_uri, int flags); Constructor - create a new rasqal_data_graph. The name_uri is only used when the flags are RASQAL_DATA_GRAPH_NAMED. uri : source URI name_uri : name of graph (or NULL) flags : RASQAL_DATA_GRAPH_NAMED or RASQAL_DATA_GRAPH_BACKGROUND Returns : a new rasqal_data_graph or NULL on failure. rasqal_free_data_graphvoid rasqal_free_data_graph (rasqal_data_graph *dg); Destructor - destroy a rasqal_data_graph object. dg : rasqal_data_graph object rasqal_data_graph_flagstypedef enum { RASQAL_DATA_GRAPH_NONE = 0, RASQAL_DATA_GRAPH_NAMED = 1, RASQAL_DATA_GRAPH_BACKGROUND = 2, } rasqal_data_graph_flags; Flags for the type of rasqal_data_graph. These are used by rasqal_query_add_data_graph(). See rasqal_data_graph. RASQAL_DATA_GRAPH_NONE Internal. RASQAL_DATA_GRAPH_NAMED Graphs with a source and name. RASQAL_DATA_GRAPH_BACKGROUND Graphs with a source only. rasqal_data_graph_printvoid rasqal_data_graph_print (rasqal_data_graph *dg, FILE *fh); Print a Rasqal data graph in a debug format. The print debug format may change in any release. dg : rasqal_data_graph object fh : the FILE* handle to print to