RDF関連メモ on Planet masaka : 2008-02

Planet masakaから2008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。

2008-02-29

Lqraps
Lqraps is backwards SPARQL. It the reverse: by annotating a tabular resultset, and rebinding the results to fragments of RDF (specified using SPARQL's CONSTRUCT notation) you can generate RDF - by danbri, 2008-02-29 (at 14:46)

Transcript: Sir Tim Berners-Lee Talks with Talis about the Semantic Web
transcript of an interview by Paul Miller for Talis, recorded on 7 February 2008 (at 14:26)
Sir Tim Berners-Lee: Semantic Web is open for business [ZDNet Blog]
summary of the first of a new podcast series for ZDNet; Talking Semantics, from SPARQL, SciAm article to DBPedia, FOAF, Data Portability - 2008-02-26, by Paul Miller (at 14:19)

SALT - Semantically Annotated LaTeX
an authoring framework for creating semantic documents, defines and series of new LaTeX commands, while making use of some of the already existing ones in order to capture the logical structure of the document and the semantics present in the publication' (at 14:30)
reading a long but interesting discussion on FOAF, SPARQL and security techs including SAML (original post at 10:08)
Top-Down: A New Approach to the Semantic Web [ReadWriteWeb]
The essence of a top-down semantic web service is simple - leverage existing web information, apply specific, vertical semantic knowledge and then redeliver the results via a consumer-centric application - by Alex Iskold, 2007-09-20 (at 01:53)

Scientific American: "The Semantic Web in Action" [TechnicaLee Speaking]
some practical examples of problems currently being solved with SW technologies, particularly in health care and life sciences + a whirlwind tour across the current landscape of SW apps - 2007-12-20, by Lee Feigenbaum (at 17:13)
11 Things To Know About Semantic Web [ReadWriteWeb]
transition from “structure upfront” to “structure on the fly”; integration; Don’t look for a killer app, but powerful APIs; not YASE but vertical search; Tagging; The winners will know how to motivate community - 2008-02-16, by Bernard Lunn (at 16:56)
found FireFox 3β refused to install Semantic Radar (FF2 was OK) (original post at 12:19)
Semantic RadarのレポートをCaptSoloに送ること (original post at 01:55)
updates cwm to play with TimBL's "Happy Birthady " :to "Resource Description Framework (RDF) Model and Syntax Specification" . (original post at 01:42)
testing to convert LC's permalink/MODS to RDF/XML. Sample result: http://tinyurl.com/2otb6v (original post at 01:05)

ah, no, it's not only in persistent model. Certain queries are not good with SPARQL. Not sure why (original post at 21:16)
giving up to use Jena SPARQL in some persistent model queries (original post at 19:53)
learned that Yahoo micro search's small sw icon gave whole bunch of triples in RDF/XML (original post at 10:15)
didn't notice that, @kasei ! looking forward to final release of RDF::Query 2.0 (original post at 01:08)
大きなデータベース上のグラフにJena/SPARQLで問い合わせをすると、ディスクアクセスの性能がかなり影響する感じ (original post at 00:57)
うーむ、ノートPCでは全グラフの削除に3分、取り込みには5分かかる（約10MBのRDF/XML）。15MBのファイルは15分もかかった (original post at 00:26)

SemanticCampの成果はなかなか壮観だ (original post at 23:12)
finally got RDF::Query 2.0b work after installing some dependent modules (original post at 09:27)
@kasei, list:member works. Great, thanks! Still cannot get RDF::Query 2.0b work, though. Will send more reports later on DM (original post at 09:04)

wondering if there is a way to write SPARQL query to find a Collection, just one of whose members is known, but # of members unknown (original post at 16:48)

wishes could join semanticcamp (original post at 01:46)
ummm, group graph patterns not always make Jena SPARQL slower ... then what causes this trouble ? (original post at 00:29)

got trouble with SPARQL in Jena again, but this time no group graph pattern. what's going on ??? (original post at 23:23)

changed the model to avoid group pattern in SPARQL. now got acceptable speed, but not fully satisfied (original post at 16:25)
not sure why access to SPARQL ResultSet in Jena gets very slow in certain case. should test more (original post at 12:15)

interested that @i_yudai doubts "The SPARQL grammar is LL(1)", at http://tinyurl.com/3cvwtg (original post at 08:29)

@dorzey, auto tagging is interesting though RDF looks a bit redundant. Anyway, it's demo & doesn't tell much. should read docs. more later (original post at 00:16)

looking at the resulting RDF from Calais Text Tagger, an application of Reuter's Calais semantic web service API (original post at 23:39)
Reuters CEO sees "semantic web" in its future [O'Reilly Rader]
プロが利用するための情報付加価値としてセマンティック・ウェブを考える (original post at 23:25)
Calais Text Tagger - An Open Synapse Service
Calais API demo app - a web-based submission tool built with Ruby by Abhay Kumar, allows you to paste the text for analysis and view the result immediately.(Tag + RDF) (at 14:57)
Reuters CEO sees "semantic web" in its future [O'Reilly Rader]
"It's not about having end users add semantics ...But professional publishers definitely have an incentive to add semantics if their ultimate consumer is not just reading what they produce, but processing it in increasingly sophisticated ways." 2008-02-08 (at 14:17)
Calais - Reuter's semantic web service
automatically attaches rich semantic metadata to the content, using NLP, machine learning etc, it categorizes and links document with entities, facts, and events. metadata returned as RDF with GUID; owl:sameAs http://www.opencalais.com/ (at 11:25)

testing Jena Dataset and SPARQL named graph (original post at 17:50)
hercules rdf library in javaScript: sparql engine demo
looking at @i_yudai's JS SPARQL Engine Demo: http://www.arielworks.net/works/codeyard/hercules/demo/index.html (original post at 01:34)

wondering POWDER/XML + GRDDL = RDF means that wdr: vocab/expression cannot be used in RDF directly ? (original post at 16:18)
20MBのRDF/XMLを毎回パースするのは、やはり馬鹿馬鹿しいから、DBモデルにすべきだと思うんだけどなぁ (original post at 00:45)