RDFの検索とデータセット｜LOD Diary｜RDF/Linked Open Data等の最新情報ブログ【Infocom デジタルアーカイブシステム】
神崎 正英 RDFグラフの検索 RDFのデータを利用するためには、データの中から求めるサブセットを取得する（検索する）手段が必要です。グラフをたどるだけでは、発見はあっても、求めるものを確実に得ることは難しいからです。 RDFトリプルとデータベース RDFグラフに対する検索を単純に考えれば、グラフをデータベースなどに収めて条件に合致するものを照会することになります。グラフは主語―述語―目的語のトリプルの集合ですから、これらの要素をデータベースのフィールドとみなして扱うのが最もシンプルな方法でしょう。 たとえば前回のJSON-LD記述例で取り上げたグラフなら、次のようなテーブルにグラフが格納されます。 SPO http://example.org/photo/2008/0208.jpg
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Linked Open Data勉強会2020 後編：SPARQLの簡単な使い方、SPARQLを使った簡単なアプリ開発KnowledgeGraph
GRefine RDF Extension
RDF Refine - a Google Refine extension for exporting RDF Main features Reconcile & interlink Reconcile against SPARQL endpoints, RDF dumps Search the Web for related RDF datasets Export RDF GUI for defining the shape of the RDF graph Use you own vocabulary or import existing ones Autocomplete for property and class names Download extension 0.8.0 Getting started… Make sure "extensions" folder exist
OpenLink Data Explorer Extension
What is the OpenLink Data Explorer Extension? The OpenLink Data Explorer (ODE) is a browser extension (currently available for Firefox, Safari, Chrome, Opera, and Internet Explorer with additional browser support to follow) that adds a new option to the realm of Web User Agent functionality, in the form of new menu options for viewing Data Sources associated with Web Pages. Why is the OpenLink Dat
New RDFa Drafts Published
Author(s) and publish date By: Ivan Herman Published: 31 January 2012 The W3C RDF Web Applications Working Group has published three Last Call Working Drafts today: RDFa Core 1.1, RDFa Lite 1.1 and XHTML+RDFa 1.1. Together, these documents outline the vision for RDFa in a variety of XML and HTML-based Web markup languages. RDFa Core 1.1 specifies the core syntax and processing rules for RDFa 1.1 a
SPARQLer
SPARQLer - General purpose processor General SPARQL query : input query, set any options and press "Get Results" Target graph URI (or use FROM in the query) If no dataset is provided, the query will execute against an empty one. The query can contain use VALUES to set some variables. Output: XSLT style sheet (blank for none): Force the accept header to text/plain regardless
Triplr
RDF format transformations http://triplr.org/output/source-uri output-format is one of html, json, ntriples, rdf or turtle. source-uri is like example.org/foo/bar # Ntriples from RSS http://triplr.org/ntriples/librdf.org/NEWS.rdf # Turtle from RSS http://triplr.org/turtle/cultofmac.com.feedsportal.com/c/33797/f/606249/index.rss # Turtle from HTML via GRDDL http://triplr.org/turtle/www.kanzaki.com/
RDFa Distiller and Parser
What is it? RDFa is a specification for attributes to be used with XHTML or SVG Tiny to express structured data. The rendered, hypertext data of XHTML is reused by the RDFa markup, so that publishers don’t need to repeat significant data in the document content. The underlying abstract representation is RDF, which lets publishers build their own vocabulary, extend others, and evolve their vocabula
W3C RDF Validation Service
Check and Visualize your RDF documents olde servlet Enter a URI or paste an RDF/XML document into the text field above. A 3-tuple (triple) representation of the corresponding data model as well as an optional graphical visualization of the data model will be displayed. Check by Direct Input <?xml version="1.0"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl
schema.rdfs.org - Home
What is Schema.RDFS.org? Only very recently the three big search engines Bing, Google and Yahoo! introduced Schema.org, a collection of schemas that webmasters can use to markup their pages. The search engines rely on this markup to improve the display of search results, making it easier for people to find the right web pages. This site is a complementary effort by people from the Linked Data comm
Using RDFa 1.1 Lite with Schema.org
As a result of our continued discussions and collaborations with publishers, implementers and standards-makers, we're pleased to give advance notice of a new way of adopting schema.org's structured data vocabulary. W3C's RDF Web Applications group are right now putting the finishing touches to the latest version of the RDFa standard. This work opens up new possibilities also for developers who int
RDF Translator
License and Source Code The source code of this tool is available under a LPGL license from here. This service is built on top of RDFLib 5.0.0, an RDF library which allows to parse and serialize between data formats. Furthermore, it is using pyRdfa for RDFa 1.1 parsing, pyMicrodata for Microdata parsing, and rdflib-jsonld for parsing and serializing JSON-LD. For the conversion to RDFa and Microdat
Triplestore - Wikipedia
A triplestore or RDF store is a purpose-built database for the storage and retrieval of triples[1] through semantic queries. A triple is a data entity composed of subject–predicate–object, like "Bob is 35" (i.e., Bob's age measured in years is 35) or "Bob knows Fred". Much like a relational database, information in a triplestore is stored and retrieved via a query language. Unlike a relational dat
W3C Introduces an HTML5 Logo
First Drafts of Three Audio API Specifications Published 15 December 2011 The Audio Working Group has published three First Public Working Drafts to provide an advanced audio API for the Web: the Web Audio API and MediaStream Processing API specifications each define a different approach to process and synthesize audio streams directly in script. These APIs can be used for interactive applications
Web NDL Authorities
Web NDL Authoritiesは、国立国会図書館が作成している典拠データを検索・ダウンロードできるサービスです。 検索例 🔍夏目漱石🔍源氏物語🔍インターネット🔍漫画 各典拠データから、国立国会図書館サーチの書誌データを検索することもできます。 Web NDL Authoritiesについて 典拠データを使った資料検索：Web NDL Authoritiesガイド（NDL-HPへリンク） Web NDL Authorities is a service that allows you to search and download authority data created by the National Diet Library, Japan. Search Keyword Example 🔍与謝野晶子🔍Genji monogatari🔍Internet🔍Manga
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