- From: Thierry MICHEL <tmichel@w3.org>
- Date: Thu, 02 Feb 2012 09:56:47 +0100
- To: Wonsuk Lee <wonsuk73@gmail.com>
- CC: Sebastian Schaffert <sebastian.schaffert@salzburgresearch.at>, Florian Stegmaier <stegmai@dimis.fim.uni-passau.de>, public-media-annotation@w3.org
I have removed the creator entry for You Tube. creator exact /atom:entry/atom:author/@uri creator:@url It is now back as it was in the PR version. creator N/A N/A see at http://www.w3.org/2008/WebVideo/Annotations/drafts/ontology10/REC/#youtube-table If we want to introduce a new mapping with atom, will will publish it in the "list of candidate formats with additional mappings is available". (linked from the REC http://www.w3.org/2008/WebVideo/Annotations/drafts/ontology10/additional-mappings.html Thierry. Le 01/02/2012 23:45, Wonsuk Lee a écrit : > Hi. Thierry. > > 2012/2/2 Thierry MICHEL<tmichel@w3.org>: >> It is now way too late to introduce a new mapping table in the REC document. >> AC reps have voted on the PR document and we are not allowed to introduce >> more stuff into the specification apart from small editorial bugs fix. >> >> I propose that we leave the spec as is. I will remove the creator entry in >> the YouTube mapping. >> >> creator exact /atom:entry/atom:author/@uri creator:@url >> >> We can add a new mapping table with ATOM format in the appropriate document >> linked from the REC document. >> > > Sure. That is what I would like to say ;) > > best regards, > Wonsuk. > >> >> Thierry. >> >> >> >> Le 01/02/2012 19:09, Wonsuk Lee a écrit : >> >>> Hi. Sebastian. >>> Thanks a lot for good comments. >>> >>> I think in case of youtube metadata format, we need to provide two >>> different mapping table for RSS format and ATOM format. Because >>> metadata description for media with one format like RSS or ATOM is >>> appropriate than mixed description with both format. >>> What do you think? >>> >>> best regards, >>> Wonsuk. >>> >>> 2012/1/31 Sebastian Schaffert<sebastian.schaffert@salzburgresearch.at>: >>>> >>>> Dear all, >>>> >>>> while implementing a YouTube-Media Ontology mapper, I encountered the >>>> following additional problems: >>>> >>>> 1. ATOM Protocol >>>> >>>> YouTube nowadays uses the ATOM protocol as default, not RSS (still >>>> available as secondary protocol though) >>>> >>>> >>>> 2. Keywords (ma-ont:keyword) >>>> >>>> XPath: /atom:entry/media:group/media:keywords >>>> >>>> YouTube will return a single value with a comma-separated list of >>>> keywords; in Media Ontology, this should be split into at least the >>>> individual keywords. >>>> >>>> An alternative offered by the YouTube Atom API would be >>>> /atom:entry/atom:category[@scheme='http://gdata.youtube.com/schemas/2007/keywords.cat']/@term >>>> >>>> 3. Category (ma-ont:genre) >>>> >>>> XPath: /atom:entry/media:group/media:category >>>> >>>> YouTube returns the category as a string, but the reference defines that >>>> this string should be mapped to the YouTube Schema URI, i.e. >>>> >>>> if /atom:entry/media:group/media:category = Music, then the mapping >>>> should be to http://gdata.youtube.com/schemas/2007#Music; >>>> >>>> reference: >>>> http://code.google.com/intl/de-DE/apis/youtube/2.0/reference.html#youtube_data_api_tag_category >>>> >>>> >>>> 4. Copyright (ma-ont:copyright) >>>> >>>> XPath: /atom:entry/media:group/media:license >>>> >>>> the YouTube API returns copyright information as media:license element. >>>> This could be mapped to the ma-ont:copyright property with a bit of >>>> transformation, because YouTube only offers two values, "cc" for creative >>>> commons and "youtube" for their own license. >>>> >>>> reference: >>>> http://code.google.com/intl/de-DE/apis/youtube/2.0/reference.html#youtube_data_api_tag_media:license >>>> >>>> >>>> >>>> Here is my complete mapping implementation: >>>> private static Map<String,ValueMapper> mediaOntMappings = new >>>> HashMap<String, ValueMapper>(); >>>> static { >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#identifier", new >>>> XPathLiteralMapper("/atom:entry/atom:id")); >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#title", new >>>> XPathLiteralMapper("/atom:entry/atom:title")); >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#locator", new >>>> XPathURIMapper("/atom:entry/media:group/media:content/@url")); // URI >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#creator", new >>>> XPathURIMapper("/atom:entry/atom:author/@uri")); // URI >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#date", new >>>> XPathLiteralMapper("/atom:entry/atom:published","dateTime")); >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#location", new >>>> XPathLiteralMapper("/atom:entry/georss:where/gml:Point/gml:pos")); >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#description",new >>>> XPathLiteralMapper("/atom:entry/media:group/media:description")); >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#keyword", new >>>> XPathLiteralMapper("/atom:entry/atom:category[@scheme='http://gdata.youtube.com/schemas/2007/keywords.cat']/@term")); >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#genre", new >>>> YoutubeCategoryMapper("/atom:entry/media:group/media:category")); // >>>> URI, should be mapped to YouTube schemas >>>> (http://gdata.youtube.com/schemas/2007#) >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#rating", new >>>> XPathLiteralMapper("/atom:entry/gd:rating/@average","float")); // >>>> Float >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#copyright", new >>>> XPathURIMapper("/atom:entry/media:group/media:license/@href")); // >>>> URI of license terms >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#publisher", new >>>> XPathURIMapper("/atom:entry/atom:author/@uri")); // URI >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#compression",new >>>> XPathLiteralMapper("/atom:entry/media:group/media:content/@type")); >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#duration", new >>>> XPathLiteralMapper("/atom:entry/media:group/media:content/@duration","integer")); >>>> mediaOntMappings.put("http://www.w3.org/ns/ma-ont#format", new >>>> XPathLiteralMapper("/atom:entry/media:group/media:content/@type")); >>>> mediaOntMappings.put("http://xmlns.com/foaf/0.1/thumbnail", new >>>> XPathURIMapper("/atom:entry/media:group/media:thumbnail/@url")); >>>> mediaOntMappings.put("http://rdfs.org/sioc/ns#num_views", new >>>> XPathLiteralMapper("/atom:entry/yt:statistics/@viewCount","integer")); >>>> } >>>> >>>> I will publish the source code as part of our Linked Media Framework as >>>> soon as our servers are running again :) >>>> >>>> >>>> >>>> Am 31.01.2012 um 12:55 schrieb Florian Stegmaier: >>>> >>>>> Dear Thierry, all, >>>>> >>>>> our colleagues at Salzburg Research are using our ontology (and soon the >>>>> API) in their Linked Media Framework. I have put Sebastian into CC. He has >>>>> just send me the pointer, that there is a mapping for ma:creator. In our >>>>> mapping table there is N/A. >>>>> >>>>> Please refer to [1] and mapping would be as follows: >>>>> >>>>> "/atom:entry/atom:author/@uri" -> "http://www.w3.org/ns/ma-ont#creator" >>>>> >>>>> We should discuss this in todays telecon. He will finalize his work on >>>>> YouTube today and will provide me his mappings as well. >>>>> >>>>> Cheers. >>>>> >>>>> [1] http://gdata.youtube.com/feeds/api/videos/EM4vblG6BVQ >>>>> _____________________________ >>>>> Dipl. Inf. Florian Stegmaier >>>>> Chair of Distributed Information Systems >>>>> University of Passau >>>>> Innstr. 43 >>>>> 94032 Passau >>>>> >>>>> Room 248 ITZ >>>>> >>>>> Tel.: +49 851 509 3063 >>>>> Fax: +49 851 509 3062 >>>>> >>>>> stegmai@dimis.fim.uni-passau.de >>>>> https://www.dimis.fim.uni-passau.de/iris/ >>>>> http://twitter.com/fstegmai >>>>> _____________________________ >>>>> >>>>> >>>>> >>>>> _____________________________ >>>>> Dipl. Inf. Florian Stegmaier >>>>> Chair of Distributed Information Systems >>>>> University of Passau >>>>> Innstr. 43 >>>>> 94032 Passau >>>>> >>>>> Room 248 ITZ >>>>> >>>>> Tel.: +49 851 509 3063 >>>>> Fax: +49 851 509 3062 >>>>> >>>>> stegmai@dimis.fim.uni-passau.de >>>>> https://www.dimis.fim.uni-passau.de/iris/ >>>>> http://twitter.com/fstegmai >>>>> _____________________________ >>>>> >>>> >>>> Sebastian >>>> -- >>>> | Dr. Sebastian Schaffert >>>> sebastian.schaffert@salzburgresearch.at >>>> | Salzburg Research Forschungsgesellschaft >>>> http://www.salzburgresearch.at >>>> | Head of Knowledge and Media Technologies Group +43 662 2288 >>>> 423 >>>> | Jakob-Haringer Strasse 5/II >>>> | A-5020 Salzburg >>>> >>>> >>> >> >
Received on Thursday, 2 February 2012 08:57:08 UTC