RDF Semantic Graph Overview
Oracle Spatial and Graph support for semantic technologies consists mainly of Resource Description Framework (RDF) and a subset of the Web Ontology Language (OWL). These capabilities are referred to as the RDF Semantic Graph feature of Oracle Spatial and Graph.
You should understand key concepts related to the support for a subset of the Web Ontology Language (OWL).
Simple Knowledge Organization System (SKOS) Support
You can perform inferencing based on a core subset of the Simple Knowledge Organization System (SKOS) data model, which is especially useful for representing thesauri, classification schemes, taxonomies, and other types of controlled vocabulary.
Semantic Indexing for Documents
Information extractors locate and extract meaningful information from unstructured documents. The ability to search for documents based on this extracted information is a significant improvement over the keyword-based searches supported by the full-text search engines.
Fine-Grained Access Control for RDF Data
The default control of access to the Oracle Database semantic data store is at the model level: the owner of a model can grant select, delete, and insert privileges on the model to other users by granting appropriate privileges on the view named RDFM_<model_name>. However, for applications with stringent security requirements, you can enforce a fine-grained access control mechanism by using the Oracle Label Security option of Oracle Database.
RDF Semantic Graph Support for Apache Jena
RDF Semantic Graph support for Apache Jena (also referred to here as support for Apache Jena) provides a Java-based interface to Oracle Spatial and Graph RDF Semantic Graph by implementing the well-known Jena Graph, Model, and DatasetGraph APIs.