Dear Junyue, Sorry for the delay, it was impossible to find the time, but we were happy to see that you could progress thanks to the previous specification and the code (Java but also C++ if you want to take a look as the resultant HDT is interoperable).
Please find the technical specification here: http://www.rdfhdt.org/hdt-binary-format/. It has been published as a draft, so feel free to express your doubts or suggest comments. My apologies again. On Fri, Jun 19, 2015 at 2:17 PM, Sergio Fernández <[email protected]> wrote: > 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 > -- Javier D. Fernández García jfergar83(at)gmail.com
