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Teaching: RDF

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Graphite PHP Linked Data Library. RDF Triple-Checker. RDF Triple-Checker. RDF Translator. Contextus. Haystack Blog » A Quick Tutorial on the Turtle RDF Serialization. This post was going to be an email to a project mate in my database class, but I found myself wanting to markup the text in HTML so I figured I’d put it here.

Haystack Blog » A Quick Tutorial on the Turtle RDF Serialization

Unlike web specifications like HTML, which have only one representation on paper/disk, RDF is just an abstract model — it doesn’t matter how you represent it as long as you stay true to its abstract properties. So one of the first things people ask when it comes to RDF is, “Ok, so how to I write it?” If you Google the web for this answer, you will probably come up with RDF/XML as your answer, which is the “official” representation. Unfortunately it is also a pretty painful and hard-to-read one, too. It would be as if the United States made its official food the brussel sprout. So this is a quick tutorial in Turtle, one of the more humane RDF serializations, IMHO, because it is simple to understand, quite readible/editable in raw form by a human, and relatively compact as far as RDF goes.

URIs, Literals, and Triples. Rdfabout/ at gh-pages · JoshData/rdfabout. The Difference Between URLs and URIs. URI Conventions (OData Version 2.0) · OData - the Best Way to REST. OData Version 4.0 is the current recommended version of OData.

URI Conventions (OData Version 2.0) · OData - the Best Way to REST

OData V4 has been standardized by OASIS and has many features not included in OData Version 2.0. Go to OData Version 4.0 Introduction The Open Data Protocol (OData) enables the creation of REST-based data services, which allow resources, identified using Uniform Resource Identifiers (URIs) and defined in a data model, to be published and edited by Web clients using simple HTTP messages. This specification defines a set of recommended (but not required) rules for constructing URIs to identify the data and metadata exposed by an OData server as well as a set of reserved URI query string operators, which if accepted by an OData server, MUST be implemented as required by this document. It is encouraged that servers follow the URI construction conventions defined in this specification when possible as such consistency promotes an ecosystem of reusable client components and libraries. The Registry! RDF data model and storage. Tutorial: Jena Semantic Web Framework. Today I was poking around the Jena RDF Framework, mostly to figure out how one would use an OWL reasoner there.

Tutorial: Jena Semantic Web Framework

The Data My test ontology is fairly simple: Owl:equivalentClass and owl:sameAs considered troublesome? "In creating an ontology it is best practice not to reinvent the wheel but to reuse existing classes and properties" I'd disagree with that, quite strongly.

owl:equivalentClass and owl:sameAs considered troublesome?

One of the ways that beginners get in trouble with the semantic web is that they try too hard to reuse existing classes and properties. Turtle-validator. RDF Validation and Conversion - ResearchSpace - Ontotext Wiki. Every Turtle/RDF file must be validated before committing to SVN.

RDF Validation and Conversion - ResearchSpace - Ontotext Wiki

Else automatic repository deployment (refresh) scripts fail and you waste your colleagues' times. Jena ARQ RIOT is an RDF conversion/validation tool. It's Java based so it runs on Linux or Windows. Older installation: Access Innovations. Q?

Access Innovations

What can I do with a taxonomy? A. You can use a taxonomy in many ways: Provide a common language basis for all activities within an organization.Coordinate documents, people, and activities by using the same descriptive terminology throughout.Categorize content (documents) using taxonomy terms.Search the data in your database by taxonomy term.Use taxonomy terms as metadata for HTML records.Use the taxonomy as a browsable topic list in a portal or web site. For more detail on the business utility of a taxonomy, see this Taxodiary article. RDFS-Plus - ML Wiki. Semantic Web Technologies: XML, RDF, OWL. This talk summarizes material from the appropriate RFCs and W3C Recommendations, as well as: Extensible Markup Language (XML) 1.0 W3C Recommendation, 2006 Michel Klein.

Semantic Web Technologies: XML, RDF, OWL

Tutorial: The Semantic Web. IEEE Intelligent Systems,(16)2. 2001. Stefan Decker, Sergey Melnik, Frank Van Harmelen, Dieter Fensel, Michel Klein, Jeen Broekstra, Michael Erdmann, and Ian Horrocks. The Semantic Web: The Roles of XML and RDF. Cambridge Semantics. Introduction In RDF Nuts & Bolts you learned how to create RDF data and documents.

Cambridge Semantics

In RDF 101 we talked about the significance of vocabulary in sharing RDF data between systems, but in neither lesson did we detail how to create your own vocabulary for RDF data. RDFS (Resource Description Framework Schema) is the most basic schema language commonly used in the Semantic Web technology stack. It is lightweight and very easy to use and get started with. In fact, many of the most popular RDF vocabularies are written in basic RDFS. Using SKOS vocabularies for improving web search. Bio2RDF v2.7a. RDA Registry. The Music Ontology – Getting started.

The Music Ontology – Specification. The Music Ontology Specification provides main concepts and properties fo describing music (i.e. artists, albums and tracks) on the Semantic Web.

The Music Ontology – Specification

Latest Version Created Date Revision. Welcome to the OpenUp Data Enrichment Service. OpenUp Client The OpenUp Client allows you to access DES functionality from any web page you are browsing.

Welcome to the OpenUp Data Enrichment Service

Simply drag the bookmarklet link below onto your toolbar and click on it when you want to know more! It's still experimental so there may be the odd glitch! Cross-Origin Resource Sharing (CORS) The client makes use of CORS, allowing data to be posted to the DES. The DES is infrastructure for hosting information extraction processes. RDF and JSON: A Clash of Model and Syntax – Lost Boy. I had been meaning to write this post for some time. After reading Jeni Tennison’s post from earlier this week I had decided that I didn’t need too, but Jeni and Thomas Roessler suggested I publish my thoughts. So here they are. I’ve got more things to say about where efforts should be expended in meeting the challenges that face us over the next period of growth of the semantic web, but I’ll keep those for future posts.

Relationship. RDFS and Inferencing. Resource Description Framework Schema (RDFS) extends RDF with simple organisational constructions. These help define concepts more explicitly and also allow for inferences to be generated with a reasoning engine. Classes and Subclasses An rdfs:Class is a set of elements — it is an organisational construct rather than a tangible object. The element rdfs:SubClassOf defines a subclass relationship. If Novels are a subclass of Book and ‘Great Expectations’ is a member of the class Novel, then (through inference) ‘Great Expectations’ is also a member of the class Book. A simple hierarchy showing a few different subclasses of Book. What is an RDF Vocabulary? A Resource Description Foundation (RDF) vocabulary is a defined set of predicates that can be used in an application. You can define a vocabulary for your application by creating an ontology file, which is an RDF document that contains all possible predicates for an application.

An ontology not only defines the predicates themselves, but defines the data type of each predicate and the relationship, if any, of one predicate to another. RDFa 1.1 Distiller and Parser. Warning: This version implements RDFa 1.1 Core, including the handling of the Role Attribute. The distiller can also run in XHTML+RDFa 1.0 mode (if the incoming XHTML content uses the RDFa 1.0 DTD and/or sets the version attribute). The package available for download, although it may be slightly out of sync with the code running this service. If you intend to use this service regularly on large scale, consider downloading the package and use it locally. Storing a (conceptually) “cached” version of the generated RDF, instead of referring to the live service, might also be an alternative to consider in trying to avoid overloading this server… XHTML+RDFa 1.1 - Third Edition.

Learning Linked Data: Making Your data harvestable via RDFa. Association for Library Collections & Technical Services (ALCTS) A Guide to Representing Structured Controlled Vocabularies in the Simple Knowledge Organization System. Structured Data Validation and Testing Tools. Tools for testing structured data markup and rich snippet display, including microformats and marked up in microdata, RDFa, RDFa Lite and JSON-LD. When testing vocabularies and schemas, note that error messages from validators may be related to the usage requirements of only that specific data consumer, especially validation error pertaining to required fields or required properties. Rdfabout/ at gh-pages · JoshData/rdfabout.

An introduction to the Semantic Web for health sciences librarians. Association for Library Collections & Technical Services (ALCTS) Perpetual Enigma. Out of the three acronyms in the title, I guess you are most familiar with URL. Some of you may have heard the other two being thrown around here and there.

These acronyms are basically related to the internet. RDF-Gravity. Sunil Goyal, Rupert Westenthaler {sgoyal, rwestenthaler} Salzburg Research, Austria. Gephi - The Open Graph Viz Platform. RDF Validation and Conversion - ResearchSpace - Ontotext Wiki. Seebi/ Rdfabout/ at gh-pages · JoshData/rdfabout. How to publish Linked Data on the Web. This document provides a tutorial on how to publish Linked Data on the Web.

After a general overview of the concept of Linked Data, we describe several practical recipes for publishing information as Linked Data on the Web. Problems of the RDF model: Blank Nodes. There is a number of challenges regarding the realization of the Semantic Web vision. In the series of blog posts to follow, I’ll be focusing on the Linked Data field and the ideas, technologies and standards it’s based on. RDF Translator. RDF - Semantic Web Standards. Overview. Graphs, XML, and RDF. SWValidators - Semantic Web Standards. This page tries to collect what the current situation is with SW related validators what could be added with a reasonable amount of work The page was created after Semantic Web Coordination Group discussions, noting that the current RDF validator has not been actively developed for several years.

What is difference b/w rdfs:domain and rdfs:range.? From a very simplistic point of view, the domain and range properties are there to give you insight into the way that the property links a subject to an object. In the case of the domain property, when you link a subject to an object using a property with this associated attribute, then the subject qualifies as a type of thing specified in the domain. Things%20to%20be%20careful%20about%20-%20RDF.pdf. Namespace lookup for RDF developers.

Hyperthing - the Linked Data Validator. Semantic web - RDFS vs. OWL Reasoners — Design considerations. SemApps - Creating Semantic Applications: Using Jena to convert RDF/OWL file formats. The Music Ontology – Getting started. ISO 8601. First steps in RDFa: Creating a FOAF profile. Movie. Tutorial_Hermans. Linked Open Vocabularies. SKOS Simple Knowledge Organization System Primer. 02%20-%20Sean.pdf. 11ProtegeOWL2.pdf. Designing An Ontology In OWL - Using A Domain Or Range. Difference between domain and range in rdf schema? WAND Taxonomies Blog: Common Taxonomy Questions: What is the difference between a Taxonomy and an Ontology? What is the difference between a Taxonomy and an Ontology? What is the difference between a taxonomy and an ontology? Semantic web - What is the difference between RDF Schema and Ontology? 02%20-%20Sean.pdf. Blazegraph. What is an RDF Blank Node?

Jena - create RDF using defined OWL ontology. w3. Rdfabout/ at gh-pages · JoshData/rdfabout.