Expresses data in serializations such as RDF/XML, N-Triples, Turtle, N3, Trig, JSON-LD, and RDFa. – Linked Data for Professional Education

Structured Data Linter

Fri, 21 Jul 2017 07:20:23 +0000

The Structured Data Linter is a tool aiding webmasters and web developers to verify the structured data present in their HTML pages. Search engines use structured data to understand webpages more accurately and to present enhanced search results. Linter understands microdata, JSON-LD and RDFa formats according to their latest specifications.
In addition to providing snippet visualizations for schema.org, Linter performs limited vocabulary validations for schema.org, Dublin Core Metadata Terms, Friend of a Friend (FOAF), GoodRelations, Facebook's Open Graph Protocol, Semantically-Interlinked Online Communities (SIOC), Facebook's Open Graph Protocol, Simple Knowledge Organization System (SKOS), and Data-Vocabulary.org.

URL: http://linter.structured-data.org/
Keywords: Rich snippets, RDFa, Microdata, Validation, Schema.org
Author: Kellogg, Gregg
Publisher: Structured Data Initiative
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M
Educational use: professionalDevelopment
Educational audience: professional
Interactivity type: active

Structured Data Validator

Fri, 21 Jul 2017 07:20:23 +0000

This validator, one of several Yandex Webmaster tools, allows the user to check the semantic markup of a site to make sure that indexing robots can extract all the structured data. The validator lets the user check the most common microformats: microdata, schema.org, OpenGraph and RDF. However, not all formats support special snippets or the use of annotated data.

URL: https://webmaster.yandex.com/tools/microtest/
Keywords: Rich snippets, Microdata, RDFa, Schema.org, Validation
Publisher: Yandex
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M

Introduction to Linked Data

Fri, 05 May 2017 06:59:13 +0000

This paper describes Linked Data and how the "Web of Documents" can be transformed into a "Web of Data". This approach is contrasted with the limited opportunities for linking data in traditional MARC-based bibliographic records. It includes a brief explanation of LD principles and standards, then explains how data can be embedded into HTML in several RDF serializations.

URL: http://discovery.ucl.ac.uk/1449458/2/Intro%20to%20linked%20data%20C%26I174final.pdf
Keywords: Microdata, Schema.org, Turtle, RDF/XML, RDFa
Author: Meehan, Thomas
Date created: 2014-01-01 05:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M
Educational use: instruction
Educational audience: professional

A Quick Tutorial on the Turtle RDF Serialization

Fri, 27 Jan 2017 06:47:08 +0000

This blog post covers the use of Turtle, which the author describes as "one of the more humane RDF serializations". Turtle is simple to understand, is human readable and editable in its raw form, and is relatively compact. In order to explain the serialization, the author presents the basics of the RDF data model.

URL: http://haystack.csail.mit.edu/blog/2008/11/06/a-quick-tutorial-on-the-tutrle-rdf-serialization/
Keywords: Turtle, Blank nodes, Datatypes
Author: Benson, Edward
Publisher: MIT CSAIL Research
Date created: 2008-11-06 05:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M
Educational use: instruction
Educational audience: professional
Interactivity type: expositive

OWL and DL Homework Exercises

Sat, 21 Jan 2017 06:46:41 +0000

This document contains several "written" and "electronic" homework questions originally from the course "Semantic Web Topics" at LeHigh University. They include: Draw the equivalent graph given an OWL document expressed in RDF syntax; In the OWL RDF/XML-based syntax, write two different axioms (i.e., using a different combination of constructors) stating that the classes Man and Woman are disjoint- without using owl:disjointWith; Given a sets of triples in Turtle syntax which describes several resources, write a set of OWL2 axioms that would allow one to infer several properties about each resource; For each of a series of axioms, determine which of three possible interpretations satisfy it.

URL: http://www.cse.lehigh.edu/~heflin/courses/sw-2013/hw3.pdf
Keywords: Web Ontology Language (OWL), Axioms, Disjointedness, RDF Schema, Description Logic (DL)
Author: Heflin, Jeff
Date created: 2013-02-01 05:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P2H
Educational use: assessment
Educational audience: teacher-educationSpecialist
Interactivity type: active

RDF Homework Exercises

Sat, 21 Jan 2017 06:46:41 +0000

This document contains several "written" and "electronic" homework questions originally from the course "Semantic Web Topics" at LeHigh University. They include: Translating an RDF Graph into the Turtle syntax; Using the RDFS entailment rules determine what triples can be inferred from an RDF Graph; Explain the advantage of using multiple rdfs:range statements over using the union of the individual ranges to determine the actual range; Draw the equivalent graph when given an RDF document written in XML; Write the equivalent RDF/XML for a series of online references; Using Jena, write a class object that can read in an RDF file that was written using a specific vocabulary and output a list of the publications, one per line.

URL: http://www.cse.lehigh.edu/~heflin/courses/sw-2013/hw1.pdf
Keywords: Turtle, RDF Schema, Entailment regimes, eXtensible Markup Language (XML), Apache Jena, Java
Author: Heflin, Jeff
Date created: 2013-02-01 05:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P4H
Educational use: assessment
Educational audience: teacher-educationSpecialist
Interactivity type: active

Turtle: Terse RDF Triple Language

Wed, 18 Jan 2017 06:46:16 +0000

This document defines a text syntax for RDF called Turtle as an extension of the N-Triples format, carefully taking the most useful and appropriate things added from Notation 3 while keeping the syntax describing only RDF graphs. Includes several examples using Turtle, as well as comparison to the aforementioned formats and SPARQL.

URL: https://www.dajobe.org/2004/01/turtle/2006-12-04/
Keywords: Turtle
Author: Beckett, Dave
Date created: 2006-12-04 05:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M
Educational use: instruction
Educational audience: student
Interactivity type: expositive

RDF XML

Wed, 21 Dec 2016 06:43:13 +0000

Despite the title, this resource covers more territory than simply expressing RDF in the XML serialization. It also gives a basic description of the RDF data model and its purpose, as well as RDF Schema, which provides a framework to describe application-specific classes and properties. Includes lists of RDF/RDFS classes, Properties, and Attributes. Examples show how to express RDF statements in XML (including the reuse of Dublin Core properties).

URL: http://www.w3schools.com/xml/xml_rdf.asp
Keywords: RDF/XML, RDF Schema, Dublin Core
Publisher: W3Schools.com
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P30M
Educational use: instruction
Educational audience: student
Interactivity type: expositive

Expressing Dublin Core Metadata Using RDF

Wed, 21 Dec 2016 06:43:13 +0000

This document provides recommendations for expressing Dublin Core metadata using RDF, the Resource Description Framework. It describes how the features of the DCMI Abstract Model are represented using the RDF data model. It does not rely on any specific RDF syntax, though examples using RDF/XML are provided.

URL: http://dublincore.org/documents/dc-rdf/
Keywords: RDF/XML, Dublin Core
Author: Naeve, Ambjörn
Publisher: Dublin Core Metadata Initiative (DCMI)
Date created: 2008-01-14 05:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P30M
Educational use: instruction
Educational audience: student
Interactivity type: expositive

RDFa 1.1 Primer – Third Edition

Thu, 24 Nov 2016 05:51:18 +0000

Search engines have begun to provide richer search results by extracting structured details from the Web pages they crawl and, in turn, Web publishers are producing more structured data within their content to improve their standing with search engines. A key enabling technology behind these developments is the ability to add structured data to HTML pages directly using RDFa (Resource Description Framework in Attributes). This Primer shows how to express data in HTML using RDFa and, in particular, how to mark up existing human-readable Web page content to express machine-readable data.

URL: https://www.w3.org/TR/xhtml-rdfa-primer/
Keywords: HTTP URIs, Hypertext Markup Language (HTML), Schema.org
Author: Birbeck, Mark
Publisher: W3C
Date created: 2015-03-17 07:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P30M
Educational use: instruction
Educational audience: student
Interactivity type: expositive