# Durchgängige elektronische Fahrplaninformation **Wikidata**: [Q1267026](https://www.wikidata.org/wiki/Q1267026) **Source**: https://4ort.xyz/entity/durchgangige-elektronische-fahrplaninformation ## Summary Durchgängige elektronische Fahrplaninformation (DELFI) is a software instance based in Germany that functions as a specialized tool for public transport route planning and interoperability. Operated by the *Verein zur Förderung einer Durchgängigen Elektronischen Fahrgastinformation*, it serves as a non-tangible executable component of a computer system composed of computer programs and data. The system utilizes standardized technical specifications, specifically the General Transit Feed Specification (GTFS) and NeTEx, to facilitate its operations. ## Key Facts - **Aliases:** DELFI - **Classification:** Instance of software; subclass of creative work, written work, means, and product. - **Country:** Germany - **Operator:** Verein zur Förderung einer Durchgängigen Elektronischen Fahrgastinformation - **Primary Function:** Public transport route planner and interoperability tool. - **Technical Standards:** Uses General Transit Feed Specification (GTFS) and NeTEx. - **Core Components:** Computer programs and data. - **Academic Disciplines:** Software engineering and software studies. - **Dewey Decimal Classification:** 005.3 and 005. - **Knowledge Graph ID:** /g/121crrqr - **Wikipedia Presence:** 1 sitelink (German language edition). - **Defining Characteristic:** Non-tangible executable component of a computer; the functional opposite of computer hardware. ## FAQs ### Q: What is the primary function of Durchgängige elektronische Fahrplaninformation? A: It serves as a software-based tool for public transport route planning and ensuring interoperability within the transportation network in Germany. ### Q: Who operates the DELFI system? A: The system is operated by the *Verein zur Förderung einer Durchgängigen Elektronischen Fahrgastinformation*, an organization dedicated to the promotion of integrated electronic passenger information. ### Q: What technical specifications does the software use? A: DELFI utilizes the General Transit Feed Specification (GTFS) and NeTEx, which are standard formats for exchanging transit data. ### Q: How is DELFI classified as a technical entity? A: It is classified as an instance of software, meaning it is a non-tangible executable component consisting of computer programs and data, distinct from physical computer hardware. ## Why It Matters Durchgängige elektronische Fahrplaninformation matters because it addresses the critical need for interoperability in public transportation networks. By functioning as a dedicated software tool for route planning, it transforms raw data into actionable means for users, bridging the gap between various transit systems. Its implementation of standards like GTFS and NeTEx facilitates the structured exchange of information, which is essential for modern digital infrastructure. As an entity studied within software engineering, it represents the practical application of software architecture and quality standards to solve complex logistical challenges in public transit. ## Notable For - **Interoperability Focus:** Specifically designed to enhance connectivity and data exchange within public transport systems. - **Standardization:** Distinguished by its use of globally recognized transit data standards like NeTEx and GTFS. - **Software Classification:** Recognized as a distinct creative work and written work within the Dewey Decimal system (005.3), categorizing it alongside major software entities. - **German Infrastructure:** Serves as a key component of the digital transit infrastructure in Germany. ## Body ### Definition and Classification Durchgängige elektronische Fahrplaninformation (DELFI) is formally defined as an instance of software. As such, it is the non-tangible executable component of a computer system, distinct from physical hardware. It is taxonomically classified as a subclass of creative work, written work, means, and product. Like all software entities, it is composed of two primary parts: computer programs and data. Its development and evaluation are governed by technical characteristics such as source code, software architecture, software quality, and testability. ### Operational Context DELFI operates within the field of public transport route planning and interoperability. The entity is geographically situated in Germany and is managed by the *Verein zur Förderung einer Durchgängigen Elektronischen Fahrgastinformation* (Association for the Promotion of Continuous Electronic Passenger Information). This organization oversees the software's application in facilitating seamless travel information across different transport providers. ### Technical Architecture and Standards The software functions through specific technical features and standards. It utilizes the **General Transit Feed Specification (GTFS)** and **NeTEx**, which are common data formats for transit scheduling and routing. As a software tool, it performs arithmetic or logical operations to process this data, transforming it into a usable means for route planning. The software's architecture allows it to function as a product and a utility within the broader digital ecosystem. ### Academic and Industry Context As a software entity, DELFI falls under the purview of academic disciplines such as software engineering and software studies. It is indexed under the Dewey Decimal Classification codes 005.3 and 005, placing it within the category of computer software. While DELFI is a specific entity with a sitelink count of 1 on Wikipedia (German edition), the class of "software" to which it belongs encompasses a wide range of notable implementations, including Java (1995), Sonata (1986), and Chainlink (2017). DELFI is a verified entry in the Google Knowledge Graph (ID: /g/121crrqr).