Uses available tools, servers, and endpoints to issue queries against a dataset. – Linked Data for Professional Education https://ld4pe.dublincore.org Learning resources tagged by competency Thu, 19 Nov 2020 14:45:03 +0000 en-US hourly 1 https://wordpress.org/?v=4.9.16 Eurostat Linked Data https://ld4pe.dublincore.org/learning_resource/eurostat-linked-data/ Fri, 18 Aug 2017 08:22:56 +0000 https://ld4pe.dublincore.org/learning_resource/eurostat-linked-data/ his is a Linked Data version of the Eurostat data with the goal to provide 5 star Linked Open Data on the European level, in a contextually rich and up-to-date manner, useful for ETL-style business analysis or data warehousing purposes with benefits including but not limited to: It allows for a straight-forward comparison of statistical indicators across EU countries; Through providing context for statistics it facilitates the interpretation process; Enables one to re-use observations in a fine-grained way. A SPARQL endpoint allows the user to query the entire metadata, including DSDs and dictionaries. Contains SPARQL queries kindly provided by Søren Roug from the European Environment Agency (EEA).

URL: http://eurostat.linked-statistics.org/
Keywords: Extract, Transform, Load (ETL), 5-Star Linked Open Data, SPARQL endpoint, Dataset, RDF
Author: Roug, Søren
Publisher: DERI
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P1H
Educational use: professionalDevelopment
Educational audience: professional
Interactivity type: mixed

]]> Jena Full Text Search https://ld4pe.dublincore.org/learning_resource/jena-full-text-search/ Sun, 13 Aug 2017 08:18:11 +0000 https://ld4pe.dublincore.org/learning_resource/jena-full-text-search/ This documentation explains how to configure and use the Full Text extension to Apache Jena's ARQ (the module is included in Fuseki). The extension combines SPARQL and full-text search via Lucene or ElasticSearch (built on Lucene). It gives applications the ability to perform indexed full-text searches within SPARQL queries. Although SPARQL allows the use of regular expressions in FILTER, this is a test on a value retrieved earlier in the query and its use is not indexed. In other words, if you're searching for occurrences of a specific term in the rdfs:label of a bunch of products, then the search will need to examine all selected rdfs:label statements and apply the regular expression to each label in turn. If there are many such statements and many such uses of regex, then it may be appropriate to consider using this extension to take advantage of the performance potential of full text indexing.

URL: http://jena.apache.org/documentation/query/text-query.html
Keywords: SPARQL, REGEX, FILTER, Apache Jena
Publisher: Apache Jena
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P2H
Educational use: professionalDevelopment

]]> MeSH RDF SPARQL Endpoint Query Editor https://ld4pe.dublincore.org/learning_resource/mesh-rdf-sparql-endpoint-query-editor/ Tue, 08 Aug 2017 08:07:57 +0000 https://ld4pe.dublincore.org/learning_resource/mesh-rdf-sparql-endpoint-query-editor/ This interface allows users to query the RDF representation of Medical Subject Headings, a biomedical vocabulary produced by the National Library of Medicine. Available outputs: HTML, XML, CSV, TSV, JSON, RDF/XML, RDF/N3, JSON-LD, and Turtle. Includes several clickable example queries (the query is automatically generated for the user).

URL: https://id.nlm.nih.gov/mesh/query
Keywords: Medical Subject Headings (MeSH)
Publisher: National Library of Medicine (NLM)
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P1H

]]> Semantic Web Topics: Term Project https://ld4pe.dublincore.org/learning_resource/semantic-web-topics-term-project/ Sat, 21 Jan 2017 06:46:40 +0000 https://ld4pe.dublincore.org/learning_resource/semantic-web-topics-term-project/ This document outlines a final project originally from the course "Semantic Web Topics" at LeHigh University. Students are asked to extend, create, or apply one or more tools for the Semantic Web. Three kinds of projects are suggested: 1) Design a general-purpose tool that could be used to support a major capability or need of the Semantic Web (e.g., a tool to extract information from the Web, a more user-friendly tool to annotate pages with Semantic Web information, a reasoner, an ontology library system, or an information integration tool). 2) Extend an existing tool with an important new functionality (e.g., Create a new plugin for Protégé or extend Jena with new functionality. However, the new functionality must result in significant new code. 3) Take existing tools and use them to develop an interesting application. In such cases the software development could involve creating a means to convert large amounts of real-world data into Semantic Web format and/or customized query interfaces. There may also be some amount of code that ties various tools together in a novel way.

URL: http://www.cse.lehigh.edu/~heflin/courses/sw-2013/project2.pdf
Keywords: Semantic Web, API
Author: Heflin, Jeff
Date created: 2013-02-01 05:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P20H
Educational use: assessment
Educational audience: teacher-educationSpecialist
Interactivity type: active

]]> SPARQL Endpoint Probe Service https://ld4pe.dublincore.org/learning_resource/sparql-endpoint-probe-service/ Tue, 17 Jan 2017 06:46:13 +0000 https://ld4pe.dublincore.org/learning_resource/sparql-endpoint-probe-service/ This is a PHP-based tool for probing statistics about SPARQL endpoints. These include: number of triples stored, number of triples in named graphs, number of unique classes or properties, and class or property frequency. The tool is in experimental stage and subject to change, so please use it with caution.

URL: https://data-gov.tw.rpi.edu//ws/sparqlprobe.php
Keywords: SPARQL endpoint
Author: Ding, Li
Publisher: Tetherless World Constellation (TWC)
Date created: 2009-10-22 04:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P10M
Interactivity type: active

]]> Ordnance Survey Linked Data: Simple SPARQL Example https://ld4pe.dublincore.org/learning_resource/ordnance-survey-linked-data-simple-sparql-example/ Mon, 16 Jan 2017 06:46:07 +0000 https://ld4pe.dublincore.org/learning_resource/ordnance-survey-linked-data-simple-sparql-example/ This blog post shares how to retrieve several variables of data from the Ordnance Survey dataset, available as Linked Open Data (LOD). Includes SPARQL queries and instructions on how to retrieve the desired output format from the SPARQL endpoint.

URL: https://johngoodwin225.wordpress.com/2013/08/01/ordnance-survey-linked-data-simple-sparql-example/
Keywords: Linked Open Data (LOD), SPARQL
Author: Goodwin, John
Date created: 2013-08-01 04:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M
Educational use: instruction
Educational audience: student
Interactivity type: expositive

]]> Putting SPARQL on the Map with Ordnance Survey Linked Data and OS OpenSpace https://ld4pe.dublincore.org/learning_resource/putting-sparql-on-the-map-with-ordnance-survey-linked-data-and-os-openspace/ Mon, 16 Jan 2017 06:46:07 +0000 https://ld4pe.dublincore.org/learning_resource/putting-sparql-on-the-map-with-ordnance-survey-linked-data-and-os-openspace/ In this blog post, the author describes how to plot SPARQL query results from the Ordnance Survey dataset, available as Linked Open data (LOD) onto an OS OpenSpace map. This requires querying a SPARQL endpoint and choosing CSV as the output format, then pasting the URL of the generated HTTP GET request into the appropriate input field of the OS OpenSpace tool.

URL: https://johngoodwin225.wordpress.com/2013/08/20/ordnance-survey-linked-data-plotting-sparql-query-results-in-os-openspace/
Keywords: Government Open Data, Linked Open Data (LOD), SPARQL
Author: Goodwin, John
Date created: 2013-08-20 04:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M

]]> Ordnance Survey Linked Data: Combining Postcode and Spatial Queries https://ld4pe.dublincore.org/learning_resource/ordnance-survey-linked-data-combining-postcode-and-spatial-queries/ Mon, 16 Jan 2017 06:46:07 +0000 https://ld4pe.dublincore.org/learning_resource/ordnance-survey-linked-data-combining-postcode-and-spatial-queries/ Building on previous blog posts, the author shows how to query and combine data from two different datasets. Although the datasets were published by the same organization, they are in two different file formats (CSV and shape). The two datasets are, however, implicitly linked via a key. By converting both datasets into a common data language (RDF), those implicit links can be made explicit, allowing the user to easily query both datasets together.

URL: https://johngoodwin225.wordpress.com/2013/08/05/ordnance-survey-linked-data-combining-postcode-and-spatial-queries/
Keywords: SPARQL, Linked Open Data (LOD), Government Open Data
Author: Goodwin, John
Date created: 2013-08-05 04:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P20M
Educational use: instruction

]]> Ordnance Survey Linked Data: A Simple Postcode Query https://ld4pe.dublincore.org/learning_resource/ordnance-survey-linked-data-a-simple-postcode-query/ Mon, 16 Jan 2017 06:46:07 +0000 https://ld4pe.dublincore.org/learning_resource/ordnance-survey-linked-data-a-simple-postcode-query/ This blog post shares give some simple examples of what can be done with the Code-Point(R) Open dataset, available as Linked Open Data (LOD). This dataset has a URI for every Postcode Unit, Postcode Sector, Postcode District and Postcode Area in England, Scotland and Wales. Includes example SPARQL queries and also serves as a brief exercise in how to find the URIs of particular resources within a dataset and determine which predicates describe important relationships between those resources. These skills are necessary to form SPARQL queries.

URL: https://johngoodwin225.wordpress.com/2013/08/05/ordnance-survey-linked-data-a-simple-postcode-query/
Keywords: Linked Open Data (LOD), SPARQL
Author: Goodwin, John
Date created: 2013-08-05 04:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M
Educational use: professionalDevelopment
Educational audience: student
Interactivity type: expositive

]]> Ordnance Survey: SPARQL Endpoint https://ld4pe.dublincore.org/learning_resource/ordnance-survey-sparql-endpoint/ Mon, 16 Jan 2017 06:46:07 +0000 https://ld4pe.dublincore.org/learning_resource/ordnance-survey-sparql-endpoint/ In this blog post, the author draws attention to an interesting feature of some SPARQL endpoints. When a query is entered, the full HTTP GET request is shown in its own results box. This URL can be used to issue a request in PHP, Javascript, etc., and the output used within a Web application just as one would with any API call.

URL: https://johngoodwin225.wordpress.com/2013/08/07/ordnance-survey-sparql-endpoint/
Keywords: SPARQL endpoint, GET request, HyperText Transfer Protocol (HTTP), SPARQL
Author: Goodwin, John
Date created: 2013-08-07 04:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P10M

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