Junyue, in the meantime we get update the spec, please use the current version at http://www.rdfhdt.org/hdt-internals/ to start to work on the parser/serializer. I'm pretty sure the HDT guys will provide you later a changelog with the new things have change.
Cheers, On Fri, Jun 19, 2015 at 11:50 AM, Junyue Wang <[email protected]> wrote: > Hello, > > Are there any updates? > Looking forward to hearing from you! > > yours, > junyue > > On Tue, Jun 9, 2015 at 12:53 AM, Sergio Fernández <[email protected]> > wrote: > > > Thanks Javier for the clarifications. > > > > On Mon, Jun 8, 2015 at 5:55 PM, jfernand <[email protected]> wrote: > > > > > Hi Junyue, > > > > > > first of all, thanks a lot for selecting and developing this project. > Any > > > new integration with HDT is welcome! :) > > > > > > Let me briefly introduce the status of the project. So far, RDF/HDT > > > practical development has been mainly driven by the original > co-authors, > > > that is, Miguel A. Martínez, Javier D. Fernández and Mario Arias. All > the > > > HDT modifications for other use-cases, such as Streaming HDT, > Waterfowl, > > > Linked Data Fragments, etc., have used or modified our tools, > > disregarding > > > the particular specifications of the serialization format. > > > > > > The W3C submission was accepted back in 2011, so it was designed in > 2010. > > > Unfortunately, W3C member submissions are "static" (in contrast to > other > > > W3C documents), i.e. the document cannot be modified. As can be > imagined, > > > from 2010 on, we have slightly improved the format, e.g. adding CRCs, > and > > > these changes couldn't be reflected in the proposal. We manage an > > internal > > > document with these changes. I will review the document, clarify some > > parts > > > for the public audience and release it in rdfhdt.org. I cannot > quantify > > > the number of changes now, but it certainly shouldn't affect the > > complexity > > > of implementing the main interface, it is just a matter of being > > consistent > > > with the current version. > > > > > > In my opinion, one should be more careful in the serialization of the > > > Dictionary as, by default, we use a Plain Front Coding compression > > > technique. I will also try to sketch the format in the document. I will > > > contact you as soon as this is available (1-2 days), and you could help > > us > > > providing feedback if some parts are not clear. This would be useful > for > > us > > > too :) > > > > > > All the best! > > > > > > > > > > > > > > > > > > --- > > > Javier D. Fernández > > > WU Vienna > > > Institute for Information Business > > > Welthandelsplatz 1, Building D2, Entrance C, 2nd Floor > > > 1020 Vienna, Austria > > > > > > El 2015-06-08 15:45, Junyue Wang escribió: > > > > > >> Hello, > > >> > > >> I'm working on a project [5] of creating a Sesame [1] parser for RDF > > >> HDT. There's a Java implementation [2], with the licence of LGPL. Does > > >> the implementation strictly conform to the W3C specification [3]? Are > > >> there any differences between [3] and [4]? Is [4] a subset of [3]? > > >> > > >> If I need to develop a parser from scratch for the licence reason, > > >> which specification should I follow? It's been years since the > > >> invention of RDF HDT. Are these specifications and implementations out > > >> of date? > > >> > > >> Thanks you! > > >> > > >> yours, > > >> junyue > > >> > > >> [1] http://rdf4j.org/ [1] > > >> > > >> [2] http://www.rdfhdt.org/manual-of-the-java-hdt-library/ [2] > > >> [3] > > >> http://www.w3.org/Submission/2011/SUBM-HDT-Implementation-20110330/ > > >> [3] > > >> [4] http://www.rdfhdt.org/hdt-internals/ [4] > > >> [5] https://issues.apache.org/jira/browse/MARMOTTA-593 [5] > > >> > > >> Links: > > >> ------ > > >> [1] http://rdf4j.org/ > > >> [2] http://www.rdfhdt.org/manual-of-the-java-hdt-library/ > > >> [3] > http://www.w3.org/Submission/2011/SUBM-HDT-Implementation-20110330/ > > >> [4] http://www.rdfhdt.org/hdt-internals/ > > >> [5] https://issues.apache.org/jira/browse/MARMOTTA-593 > > >> > > > > > > > > > -- > > Sergio Fernández > > Partner Technology Manager > > Redlink GmbH > > m: +43 6602747925 > > e: [email protected] > > w: http://redlink.co > > > -- Sergio Fernández Partner Technology Manager Redlink GmbH m: +43 6602747925 e: [email protected] w: http://redlink.co
