How do I transform RDF to Flat table CSV, C-Store or RDB?
i think this would be useful Optimal RDF Access to Relational Databases s
How do I convert csv to RDF?
Here an extract from ConverterToRdf - W3C Wiki s CSV (Comma-Separated Values) See also Flat Files s#Flat_files and TSV s#TSV An RDF Extension is available for Google Refine . It can convert Excel CSV and other tabular data to RDF. The schema mapping can be defined in a graphical UI. RDF123 has Windows and Linux applications to download a Java application and servlet. XLWrap wraps spreadsheets (including cross tables) to arbitrary RDF graphs; supports Excel streamed processing local loading expressions similar to Excel Calc custom functions usage via API or SPARQL endpoint csv2rdf4lod uses declarative RDF enhancement parameters to specify how to transform tabular data into well-structured well-connected RDF. The tool uses identifiers for source italic organization dataset italic and version italic to establish default namespaces for all URIs created and provides VoID and provenance metadata as part of the conversion output. Tarql is amand-line application that converts CSV to RDF with a user-defined mapping. The mapping is written in standard SPARQL 1.1.
How do I convert an XML CSV file to an RDF RML format using Java?
Apache has a tool called Jena which can generate RDF files and Ontologies. Try that. It should work.
What is the Semantic Web?
The phrase Semantic Web denotes an HTTP network (e.g. World Wide Web) where the meaning of Hypers (HTTP URIs) are understood by both humans and machines (software). The understanding referred to above boils down to the nature of the subject predicate and object (optionally) roles in a sentence i.e. if each is identified by a hyper you end up with a meaningful Web of Dataprehensible to both humans and machines. What are Hypers? Identifiers that function as names i.e. they resolve to a description of whatever they identify. Using this post as an example <#this is a relative hyper that identifies this post. The statement above can be represented as a sentence using English Language (for English speaking humans) or RDF Language which serves the needs of both humans and machines. Note RDF Language supports a broad range of notations (RDF-Turtle JSON-LD RDF-JSON RDF CSV OData etc..) for actually writing sentences documents. In this example I use RDF-Turtle. English Sentence Something exists that identified by <#this is of entity schemaAnswer and is described by the content of a document at < (where < identifies the location of an HTML document Kingsley Uyi Idehen's answer to What is the Semantic Web? answer aid 277738 ). RDF Language Sentence Expressing the fact that something exists that is identified by (i.e. named) <#this n <#identifiedBy <#this . Adding a little more con to shed light on the Relationship Type (Relation) identified by <#identifiedBy <#identifiedBy a rdfProperty ; rdfssubPropertyOf schemaidentifier ; rdfslabel identifiedBy ; rdfsdomain rdfResource ; rdfsrange xsdanyURI . Visual interpretation of the statement above courtesy of our Structured Data Sniffer browser extension (a machine or piece of software) You or a machine can click (lookup or de-reference) the schemasameAs (connection relationship verb attribute or property) to see what it means and then understand the information presented in the RDF Language statement Hypers and Meaning? A hyper identifies a connection or relationship between two entities. Thus it has a denotation and connotation duality built in i.e. <#this denotes and connotes at the same time (like names do in our minds) by way of indirection (what happens when you click on a hyper). You can describe the nature (semantics) of a connection or relationship (relation attribute property) using a hyper that resolves to a collection of RDF Language statements that describe said connection or relationship . The RDF Language statements that follow demonstrate the point by describing the nature of the schemasameAs relation. Note this description uses terms from vocabularies such as RDF Schema and OWL since they focus primarily on the nature of entity s (classes) and relationship s (attributes properties). RDF Language Sentence with additional information ## Describes the Semantics (Nature or Meaning) of schemasameAs (which identifies a relationship or relation)n n schemasameAs na rdfProperty #Property owlProperty #Property owlInverseFunctionalProperty #inverseFunctionalProperty ;n schemarangeIncludes schemaCreativeWork ;n schemadomainIncludes owlThing #Thing rdfsResource #Resource ;n owldifferentFrom #differentFrom owlsameAs #sameAs ;n schemaname sameAsu8u9d ;n owldifferentFrom #differentFrom owlsameAs #sameAs ;n schemadescription An entity relationship that associates an entity with its description document. This can also be used as a powerful identification heuristic due to its inverse-functional nature i.e. all subject identifiers (hypers) of this statement identify the same entity.. ## Describes the Semantics (Nature or Meaning) of schemaAnswer Class. n schemaAnswer na rdfsClass #Class owlClass #Class . And here the full visualization of the statements above; Demonstrating Semantic Web Benefits Situation italic I stumble across a post that in essence is all about the Semantic Web but for a variety of reasons doesn necessarily use the phrase. Here how I can make the connection with con using RDF sentences right here < s#this s#this a schemaWebPage schemaBlogPosting ; schemaname AI is from Venus Machine Learning is from Mars ; schemahasPart <#GeoffreyMooreComment-216-9-16 ; schema < s s . <#GeoffreyMooreComment-216-9-16 a schemaComment ; schemaauthor < s#this s#this ; schemaname GeoffreyMooreComment-216-9-16 ; schema AI develops conceptual models of the world that are underpinned by set theory and natural language. In this con every noun or noun phrase represents a set. Every predicate implicates that set in other sets. If all human beings are mortal and you are a human being then you are mortal. It an exercise in Venn diagrams. By extending these diagrams through syntax semantics and analogy human beings build up conceptual models of the world that enable us to develop strategies for living. AI seeks to emulate this capability in expert systems. ; schemaabout dbpediaAI dbpediaMachine_learning ; schemamentions dbpediaAnalytics dbpediaSpreadsheet dbpediaList_of_reporting_software dbpediaCategoryData_analysis_software dbpediaCategorySpreadsheet_software ; nschemarelatedLink < %2Data%2Documents %2Data%2Documents ;nschema < . Visualization of the additional RDF Language sentences inscribed above Net effect this post is just another Web data source contributing semantically-rich data to the larger Semantic Web. Tools Used OpenLink Structured Data Sniffer Browser Extension (Chrome Firefox Opera Edge and Vivaldi) that turns supported browsers into Semantic Web Browsers Structured Data Editor Enables you create data remixes using Structured Data (in RDF-Turtle or JSON-LD) . Related Understanding Data s Presentation Glossary of Terms s Excerpt from Glossary scoped to notes from Tim Berners-Lee about the notion of a Semantic Web s Original Semantic Web Proposal s Signs & Reality Article by John F. Sowa
Semantic Web: What conventional books are available already in RDF format?
RDF isn't a document format; it's a data format. Books are not typically published in RDF for the same reason that they're not published as CSV. That having been said I converted Shakespeare's plays into RDF a while back. An example can be found at - the rest of them are listed at
What are some common file extensions that feed R programming analysis?
R has importers for many delimited formats such asma sparated tab delimited column delimited lists as well as formats such as JSON YAML RDF and XML. The file extension (.csv .txt etc) doesn't specify what the content is of the file. One typically needs to examine the file to know which content it is. File extensions are only hints.
Is there any relationship between decision trees and semantic technologies (RDF, OWL)?
Not An Answer - However would like a semantic back-end to this to tie related topics together - Following... How do I create a hierarchy tree using Excel form to be used for interactive graphic on the web through something like AngularJS SCSS SASS? question qid 2714686