|  |  |  | Redland RDF Library Manual |  | 
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| Top | Description | ||||
char * librdf_heuristic_gen_name (const char *name); int librdf_heuristic_is_blank_node (const char *node); const char * librdf_heuristic_get_blank_node (const char *node); int librdf_heuristic_object_is_literal (const char *object);
Various utility functions for performing heuristics such as generating a name, guessing if a string is a URI or RDF literal.
char *              librdf_heuristic_gen_name           (const char *name);
Generate a new name from an existing name.
Adds an integer or increases the integer at the end of the name in order to generate a new one
| 
 | the name | 
| Returns : | a new name or NULL on failure | 
int                 librdf_heuristic_is_blank_node      (const char *node);
Try to guess if an node string is a blank node identifier.
The guessing is done by assuming the object is a blank node if it matches ^_: like N-Triples, N3 and related.
| 
 | string object to guess type | 
| Returns : | non 0 if node is probably a blank node identifier | 
const char *        librdf_heuristic_get_blank_node     (const char *node);
Get a blank node identifier from a node string.
Picks the blank node identifier out of a string. Looks for things like _:ABC
| 
 | string object to guess type | 
| Returns : | the blank node identifer string or NULL if the node does not seem to be a blank node identifier | 
int                 librdf_heuristic_object_is_literal  (const char *object);
Try to guess if an object string is a literal or a resource.
The guessing is done by assuming the object is a URL if it matches
  ^[isalnum()]+:[^isblank()]+$
This will be fooled by literals of form 'thing:non-blank-thing' but is good enough.
| 
 | string object to guess type | 
| Returns : | non 0 if object is probably a literal |