# RDF query language

> programming language allowing easy querying on RDF graphs

**Wikidata**: [Q6138701](https://www.wikidata.org/wiki/Q6138701)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/RDF_query_language)  
**Source**: https://4ort.xyz/entity/rdf-query-language

## Summary
An RDF query language is a programming language specifically designed to allow easy querying on RDF graphs. It is a type of declarative programming language that enables users to retrieve and manipulate data stored in the Resource Description Framework (RDF).

## Key Facts
*   An RDF query language is a programming language for querying RDF graphs.
*   It is a declarative programming language.
*   It uses the Resource Description Framework (RDF).
*   SPARQL is an RDF query language, incepted on 2008-01-15.
*   SPARQL 1.1, a set of specifications for querying and manipulating RDF graph content, was incepted on 2013-03-21.
*   SPARQL 1.0 represents the earliest versions of SPARQL.
*   It is a subclass of Graph Query Language.
*   Aliases include "RDF query languages", "RDF問合せ言語", "RDF查询语言", "资源描述框架查询语言", and "RDF 쿼리 언어".
*   It has a sitelink count of 3.

## FAQs
### Q: What is an RDF query language?
A: An RDF query language is a programming language that facilitates easy querying of RDF graphs. It is categorized as a declarative programming language, meaning it focuses on *what* data to retrieve rather than *how* to retrieve it.

### Q: What kind of programming language is an RDF query language?
A: An RDF query language is a declarative programming language. It is also classified as a subclass of a Graph Query Language, reflecting its purpose in interacting with graph-structured data.

### Q: What technology does an RDF query language utilize?
A: An RDF query language utilizes the Resource Description Framework (RDF). This framework provides a standard model for data interchange on the Web, and the query language is designed to interact with data structured according to this model.

### Q: What are some examples or related technologies to RDF query language?
A: SPARQL is a prominent example of an RDF query language. Other related technologies include SPARQL 1.0, SPARQL 1.1, and SPARQL 1.1 Query Language, which provide specific versions and functionalities for querying RDF.

## Why It Matters
RDF query languages are fundamental to the Semantic Web and linked data ecosystems. They provide a standardized and efficient mechanism for interacting with the vast amounts of interconnected data represented in RDF graphs. Without these languages, extracting meaningful information from diverse, distributed, and often complex RDF datasets would be exceedingly difficult, hindering data integration, analysis, and interoperability across different systems. By enabling precise data retrieval and manipulation, RDF query languages empower applications to build intelligent services, perform sophisticated data analytics, and create more interconnected and understandable web experiences. Their declarative nature simplifies the process for developers, allowing them to focus on the data they need rather than the intricate steps of navigating graph structures, thereby accelerating development and fostering innovation in data-driven fields.

## Notable For
*   Specifically designed for querying data structured in Resource Description Framework (RDF) graphs.
*   Its classification as a declarative programming language, simplifying data retrieval specifications.
*   Being the foundational concept for widely adopted standards like SPARQL.
*   Enabling structured and programmatic access to interconnected data on the Semantic Web.

## Body

### Definition and Purpose
An RDF query language is a programming language whose primary function is to enable easy querying on RDF graphs. It provides a structured way to retrieve, filter, and manipulate data stored in the Resource Description Framework (RDF) format.

### Classification and Characteristics
RDF query languages are classified as a type of declarative programming language. This means that users specify the desired result or pattern of data they want to find, rather than detailing the step-by-step process of how to retrieve it. It is also a subclass of a Graph Query Language, reflecting its application to graph-structured data.

### Core Technology
The core technology that an RDF query language "uses" is the Resource Description Framework (RDF). RDF provides a standard model for data interchange, representing information as a set of subject-predicate-object triples, forming a graph.

### Related Technologies and Standards
Several related technologies and standards are associated with RDF query languages:
*   **SPARQL**: A prominent RDF query language itself, incepted on 2008-01-15. It has a sitelink count of 37.
*   **SPARQL 1.0**: Represents the earliest versions of the SPARQL query language.
*   **SPARQL 1.1**: A set of specifications providing languages and protocols to query and manipulate RDF graph content. It was incepted on 2013-03-21.
*   **SPARQL 1.1 Query Language**: An RDF query language and file format, part of the SPARQL 1.1 specifications.
*   **SPARQL-Generate**: A transformation language used to generate RDF.

### Aliases and Identifiers
The entity is known by several aliases across different languages:
*   RDF query languages
*   RDF問合せ言語 (Japanese)
*   RDF查询语言 (Simplified Chinese)
*   资源描述框架查询语言 (Simplified Chinese)
*   RDF 쿼리 언어 (Korean)

It also has various identifiers:
*   **freebase_id**: /m/0gtvyj
*   **esco_skill_id**: 99207709-d076-4cce-ba38-e90d3bb28806
*   **microsoft_academic_id_(discontinued)**: 96956885

### Wikipedia and Wikidata Information
*   **wikipedia_title**: RDF query language
*   **wikipedia_languages**: en, ja, pl
*   **wikidata_description**: programming language allowing easy querying on RDF graphs
*   **topic's_main_category**: Category:RDF data access
*   **sitelink_count**: 3

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## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)