SEM_APIS.GET_TRIPLE

Format

SEM_APIS.GET_TRIPLE_ID(
     model_id  IN NUMBER, 
     subject   IN VARCHAR2, 
     property  IN VARCHAR2, 
     object    IN VARCHAR2 
     ) RETURN VARCHAR2;

or

SEM_APIS.GET_TRIPLE_ID(
     model_name IN VARCHAR2, 
     subject    IN VARCHAR2, 
     property   IN VARCHAR2, 
     object     IN VARCHAR2 
     ) RETURN VARCHAR2;

Description

Returns the ID of a triple in the specified semantic technology model, or a null value if the triple does not exist.

Parameters

model_id: ID number of the semantic technology model. Must match a value in the MODEL_ID column of the SEM_MODEL$ view, which is described in Metadata for Models.
model_name: Name of the semantic technology model. Must match a value in the MODEL_NAME column of the SEM_MODEL$ view, which is described in Metadata for Models.
subject: Subject. Must match a value in the VALUE_NAME column of the RDF_VALUE$ table, which is described in Statements.
property: Property. Must match a value in the VALUE_NAME column of the RDF_VALUE$ table, which is described in Statements.
object: Object. Must match a value in the VALUE_NAME column of the RDF_VALUE$ table, which is described in Statements.

Usage Notes

This function has two formats, enabling you to specify the semantic technology model by its model number or its name.

Examples

The following example returns the ID number of a triple. (This example is an excerpt from Example 1-129 in Example: Journal Article Information.)

SELECT SEM_APIS.GET_TRIPLE_ID(
  'articles',
  'http://nature.example.com/Article2',
  'http://purl.org/dc/terms/references',
  'http://nature.example.com/Article3') AS RDF_triple_id FROM DUAL;
 
RDF_TRIPLE_ID
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