RDF関連メモ on Planet masaka : 2010-02

Planet masakaから2010年2月のRDF／セマンティック・ウェブ関連メモを抽出してまとめたものです。

2010-02-28

A Flock of Twitters: Decentralized Semantic Microblogging [Recent Thoughts]
Decentralizing and individualizing Stream creation and management will help ensure that the MicroBlogOcean does not have a central point of failure and does not require a central-controlling authority. With a properly semantified and structured Stream, even efficient and effective privacy and identity management become feasible - by Jeff Sayre, 2010-02-27 (original post at 01:07)
RDFセマンティクス仕様書・付録Aのインスタンス補助定理で、グラフのスコーレム化に関する部分にタイポがあるのを@bblfishが発見。普通気づかないでしょ… http://lists.w3.org/Archives... (original post at 00:48)

Linked Data API Specification
a vocabulary and processing model for a configurable API layer intended to support the creation of simple RESTful APIs over RDF triple stores... to be deployed as a proxy in front of a SPARQL endpoint to support: Generation of documents (information resources) ..; Provision of sophisticated querying and data extraction features, without the need for end-users to write SPARQL queries; ..multiple output formats from these APIs, incl.. JSON syntax (original post at 22:53)
BBC Wildlife Ontology and RDF http://lists.w3.org/Archives... from @derivadow さまざまな生き物を美しい写真で紹介するページでRDFを。URIに.rdfを付加するalternativeリンクのほかconnegも (original post at 22:28)
RFC 5721: POP3 Support for UTF-8が発行された。いちおう実験的とはされているが、ヘッダ（RFC 5335）、SMTP（5336）、下方互換変換（5504）と合わせて、ひととおりUTF-8メールの仕様が出揃ったかな (original post at 19:31)

Semantic GIS Project (semanticgis)
This site addresses the problem of semantic web services within Geographic Information Systems (GIS) domain. We provide the meta model for semantic service specification in GIS (original post at 08:48)

RFC 2731 ("Encoding Dublin Core Metadata in HTML") Is Obsolete という RFC 5791が発行された。今後はDCMIを参照してね、と (original post at 12:45)

pyRdfa.transform.ContainersCollections
Transfomer: handles the RDF collections and containers ... RDF containers, whereas structures of the form: <ul typeof="rdf:List"><li>....</li>....</ul> are turned into intermediate DOM nodes that yield, via the RDFa processing, RDF collections - by Ivan Herman (original post at 01:56)

neo4j open source nosql graph database
Neo4j is a graph database. It is an embedded, disk-based, fully transactional Java persistence engine that stores data structured in graphs rather than in tables... It is a mature and robust graph database that provides .. optional layers to expose Neo4j as an RDF store, i.e. easily inject / extract data as RDF, express meta model semantics using OWL and query the node space using SPARQL (original post at 18:46)

Yahoo!検索プラグインとメタデータの埋め込み http://techblog.yahoo.co.jp/... RDFaの具体的な用例付き。RDF ReviewやRDF vCardも使われてる。Yahooとしてはデータ型も欲しいんだろうか？ #rdfa (original post at 13:22)

haven't seen it before, @danbri, thanks. hmm.. wnjpn is to WordNet RDF what my 2002 approach is to xmlns.com/wordnet/1.6/ :) (original post at 23:23)
そうそう、カードURIは"can also be the same URIs that denote people/orgs"という新RDF VCardの説明が議論になってるが、これでよいのではないかと（http://twitter.com/_masaka/s... の流れ） (original post at 14:12)

Semantic OMB http://status.net/wiki/Seman... OpenMicroBlogging仕様を更新してセマンティック・マイクロブログの共通仕様をまとめようという提案 (via @terraces) (original post at 19:56)
mmm.. does §3.1 of RDF vCard 2010 mean both "corky@example.com" and <mailto:corky@example.com> are OK for object of v:email ? confusing. (original post at 17:42)
RDF vCard 2010 http://www.w3.org/Submission... W3Cメンバー提案として改定案が登場。名前空間は2006のままで、プロパティなどもその拡張。自宅用と仕事用はクラスで表現するが、workAdrなども短縮形としてとりあえずOK (original post at 17:24)

scardf - Scala RDF API [Project Hosting on Google Code]
Scardf is an API in Scala providing a DSL for writing, traversing and querying RDF graphs. Implemented as a façade to Jena, an RDF programming framework for Java (original post at 17:18)
SPARQLの効率化の余地はないかと、ARC2のソースを眺める。なるほど、いろんな工夫してるな (original post at 11:43)

mmm, new ARC2 apparently changed its SPARQL parser, and looks fail to perform some queries e.g. more than two optionals ? (original post at 09:50)

Intelligent music recommendations http://dbrec.net/ DBpediaでプロパティ/値の一致が多いアーティストを提示する。理屈に止まらず実装を出すLOD精神は重要。出発点だから、これがセマンティック・ウェブの推薦？とか言わない… (original post at 11:05)

structWSF [OpenStructs]
structWSF is a RESTful middleware layer that provides the bridge between existing content and structure and content management systems and available indexing engines and RDF data stores - by Frédérick Giasson et al. (original post at 10:33)