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Re: YouTube mapping table

From: Joakim Söderberg <joakim.soderberg@ericsson.com>
Date: Wed, 1 Feb 2012 18:25:57 +0100
To: "tmichel@w3.org" <tmichel@w3.org>, Florian Stegmaier <stegmai@dimis.fim.uni-passau.de>
CC: "public-media-annotation@w3.org" <public-media-annotation@w3.org>, Werner Bailer <werner.bailer@joanneum.at>
Message-ID: <CB4EB457.4501%joakim.soderberg@ericsson.com>
Hi Thierry,
This kind of situation must be common, that technology that the spec
depend on changes.



On 1/31/12 9:49 AM, "Thierry Michel" <tmichel@w3.org> wrote:

>As I don't have a clear view of the updates needed in the Ontology spec,
>unfortunatly I will delay the publication of the REC.
>
>It is not the time to introduce edits at last minute with clear
>resolution, which would introduce more bugs.
>
>Please editors of the Ontology pick up this subject.
>
>Thierry.
>
>
>Florian Stegmaier a écrit :
>> Hi Sebastian, Thierry, all,
>>
>> from my opinion we should also address Sebastians proposal for
>>ma-ont:copyright. As we discussed today, a complete switch to atom would
>>have an heavy effect on all files produced until now - so i would leave
>>it as is. Also the proposal to suggest the genre vocabulary is good, but
>>we didn´t suggest something like that in another format afaik. Maybe one
>>of the ontology editors could catch this discussion up?
>>
>> Cheers.
>> _____________________________
>> 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
>> _____________________________
>>
>> Am 31.01.2012 um 16:18 schrieb Thierry Michel:
>>
>>   
>>> Here is the update line
>>>
>>> creator   |   exact  |   /atom:entry/atom:author/@uri   |
>>>creator:@url  |    URI  |    N/A
>>>
>>> Please reveiw that this is OK, and that there is no need for further
>>>updates in the Ontology doc.
>>> http://www.w3.org/2008/WebVideo/Annotations/drafts/ontology10/REC/
>>>
>>> Thierry
>>>
>>>
>>> Sebastian Schaffert a écrit :
>>>     
>>>> 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/200
>>>>7/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#youtu
>>>>be_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#youtu
>>>>be_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.you
>>>>tube.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","i
>>>>nteger"));
>>>>        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
>>>>  
>>>>       
>>
>>   
>
>
Received on Wednesday, 1 February 2012 17:26:38 GMT

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