# RDF Keyword Search

> Search RDF datasets by keywords, finding optimal vertex sets based on distance. (iPhone/iPad app by Red Soldier Limited.)

- Source: https://appshunter.io/ios/app/rdf-keyword-search/id933130961 (this page in markdown: same URL + `.md`)
- Developer: [Red Soldier Limited](https://appshunter.io/developer/379884434)
- Category: Utilities, Education
- Price: Free
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 7.0 · 11 MB
- Released: 2014-11-03
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/rdf-keyword-search/id933130961/reviews.md

## What is RDF Keyword Search?

RDF (Resource Description Framework) has been used as a standard for the representation of
web information. RDF can be modelled as a graph where vertices are entities and an edge is a 
relationship between two entities. In recent years, the W3C Linking Open Data project and the 
Linked Open Data 2 (LOD2) project have integrated data entries from many web sources, including 
Wikipedia, forming very large domains such as DBpedia with a billion RDF triples. Keyword search 
on such datasets is very useful for many web users. Typically a user searches by keywords. Given 
a query with multiple keywords, one possible definition of an answer is a set of vertices in the RDF 
graph that contains the keywords, where one vertex is the root, so that the total distance of other 
vertices from the root is the smallest. User may specify a small integer k to ask for the top-k answers, meaning the top k vertex sets that minimize the total distance. There are other possible definitions for the answer sets, which also involve distance querying given two vertices. 

This app answers RDF data querying, and the answers are computed depending on the computation of distances between vertices in the RDF graph.

## Key features

- Keyword search on RDF datasets
- Graph-based data modeling
- Distance minimization algorithms
- Top-k result retrieval
- Linked Open Data integration

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/rdf-keyword-search/id933130961/reviews.md

### 1/5 — Does not work

*2017-02-08*

Tried a half-dozen terms (including "Newton") and nothing returned, no error messages, nothing.

## Frequently asked questions about RDF Keyword Search

### What is RDF Keyword Search?

RDF Keyword Search is a utility app designed for querying large Resource Description Framework (RDF) datasets. It helps users find relevant information by searching for keywords within the graph structure.

### How does RDF Keyword Search work?

The app models RDF data as a graph and uses keyword queries to find sets of vertices. It calculates distances between vertices to identify the most relevant results, minimizing the total distance from a root vertex.

### Can I specify the number of results in RDF Keyword Search?

Yes, users can specify a small integer 'k' to request the top-k vertex sets that minimize the total distance, allowing for a tailored number of search results.

### What kind of data can RDF Keyword Search query?

The app is designed to query large RDF datasets, such as those integrated by projects like W3C Linking Open Data and LOD2, which include vast amounts of web information like Wikipedia data.

### Is RDF Keyword Search available on multiple devices?

Yes, RDF Keyword Search is supported on iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

### When was RDF Keyword Search last updated?

RDF Keyword Search was last updated on November 3, 2014, with version 1.0. This indicates it has not received updates in a significant period.

### What is the user rating for RDF Keyword Search?

RDF Keyword Search has a rating of 1.0 stars based on 1 rating. This suggests a very low level of user satisfaction or a limited number of reviews.

### Does RDF Keyword Search have ads?

No, RDF Keyword Search does not contain advertisements. The app is free to download and use without any ad interruptions.

## Version history (last 1 release)

### 1.0 — 2014-11-03

This app has been updated by Apple to display the Apple Watch app icon.

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## Related topics

[rdf keyword search](https://appshunter.io/ios/topics/rdf-keyword-search) · [rdf media](https://appshunter.io/ios/topics/rdf-media)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*