Final answer:
SPARQL 1.1 Federated Query extends SPARQL's capabilities by enabling Distributed Data Processing, which allows a single SPARQL query to access and combine information from multiple remote data sources using the SERVICE keyword.
Step-by-step explanation:
The SPARQL 1.1 Federated Query extension provides the capability of executing a single SPARQL query across multiple data sources, regardless of where the data is stored. This functionality is best described by option a) Distributed Data Processing, as it allows a SPARQL query to retrieve, combine, and manipulate data from various SPARQL-enabled databases that may be located across different servers or endpoints on the web.
By using the SERVICE keyword, SPARQL 1.1 enables queries to access data from remote SPARQL endpoints. This is useful when integrating data from independent repositories, which may be under different ownership or control, without the need for data to be centrally stored or processed sequentially. Federated Queries enhance the modular construction of SPARQL queries and provide more flexibility and power in data retrieval operations.
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