- From: Dr. Olaf Hoffmann <Dr.O.Hoffmann@gmx.de>
- Date: Mon, 4 Sep 2006 10:04:00 +0200
- To: www-svg@w3.org
Hello, some comments about type = "<media/type>" 1. the list L.2 Attribute Table it is noted, that type is of (4.1 Basic Data Types) <ContentType>. But for video, audio and image the description is type = "<media/type>" without a link to 4.1. For handler (15.5) and script (15.2) it is type = "content-type". I think, the type descriptions should fit together and a link to 4.1 is helpful, if 4.1 has any function. A description as done for type of image would be helpful too in 4.1 (including a link to 'TAG finding Authoritative Metadata'). 2. if a hint for the media or content type is useful for image, audio, video, handler and script, why isn't it applicable for a, foreignObject, prefetch and animation (if it is possible to use ofther formats as SVG for animation as suggested in the mailing list)? As far as I understand, requiredFormats has a different meaning as type and it is often not the correct way to use requiredFormats instead of type. 3. if it is believed, that the type attribute has any function, why is it not animatable if the related xlink:href is animatable? It should be enough, if the author can use the same timing for the type attribute as for the xlink:href animation to get a useful timed format description. This is related to the comment about video and audio http://lists.w3.org/Archives/Public/www-svg/2006Jul/0027.html but it is similar for image too - or if type is added for a and foreignObject. The type attribute is maybe not very important, if the documents are requested form web servers always sending any content types with higher priorities, but it is maybe important for applications on the local file system, for example for SVG games or conference presentations or if there is no further information from the webserver. And animation of the xlink:href and type attributes will get very important soon, if authors want to realise slide shows, music boxes or video boxes with interactivity and declarative animation. 4. something related for video and audio (I have not much experience with video and audio productions, but related problems occur sometimes, if I try to view videos from internet): Wouldn't it be useful too to have something similar as type or requiredFormats for the used codecs? For example something like typeCodecs and requiredCodecs? Probably to late for SVG Tiny 1.2 but nice for the Full profile just to avoid downloading multimedia containers with codecs not usable for the viewer. Best wishes
Received on Monday, 4 September 2006 08:12:45 UTC