| Basic Info | |
|---|---|
| Media Type | application |
| subtype | tve-trigger |
| Registered? | Yes |
| See also | Welsh |
| Extensions | |
Tags: (none)
File Formats: (none)
application/tve-trigger To: [email protected] Subject: Registration of MIME media type application/tve-trigger MIME media type name: application MIME subtype name: tve-trigger Required parameters: none Optional parameters: none Encoding considerations: "application/tve-trigger" is the MIME media type associated with the data sent to a trigger receiver object, in an enhanced TV application, conforming to the [SMPTE-DDE1] standard. The media type is used to instantiate a trigger receiver object on a TV enhancement HTML page. The trigger receiver object is executable code implemented by a TV receiver. Sample instantiation: <OBJECT TYPE="application/tve-trigger" ID="triggerReceiverObj"> </OBJECT> The OBJECT tag must be void of content. The TYPE and ID attributes must be set as shown in the example. The trigger receiver object processes messages, called triggers, transmitted in a TV signal for the associated TV enhancement. Triggers are text based, and their syntax follows the basic format of the [EIA-746A] standard (7-bit ASCII, the high-order bit of the first byte must be "0"). See [SMPTE-DDE1] for more information on trigger contents and the trigger receiver object. Security considerations: All insertion points for content in the TV network are assumed to be trusted sources, so no security problems are presumed. Therefore, the use of scripts in triggers, and ECMA Script in general is not presumed to be a security problem for malicious content or viruses any more than the notion of rogue video and audio being inserted into a broadcaster's emission. As with video and audio, the broadcaster is responsible for the quality of the data content of its programming. Interoperability considerations: none Published specification: [SMPTE-DDE1]: "SMPTE 363M, Declarative Data Essence, Content Level 1", produced by the Society of Motion Picture and Television Engineers (http://www.smpte.org), describes the trigger format, and the behavior of the trigger receiver object. All SMPTE standards can be purchased for a nominal fee at http://www.smpte.org/stds/index.html. Note: SMPTE specification number will be assigned once registration of this media type is approved by the IANA. [EIA-746A]: "Transport Of Internet Uniform Resource Locator (URL) Information Using TEXT-2 (T-2) Service", produced by Consumer Electronics Manufacturers Association (CEMA), and can be purchased from Global Engineering Documents (http://global.ihs.com/). Applications which use this media type: Enhanced television receivers, which conform to [SMPTE-DDE1]. Additional information: Magic number(s): none File extension(s): n/a Macintosh File Type Code(s): n/a Person & email address to contact for further information: Linda Bucsay Welsh Intel Corporation 2111 NE 25th Ave. Hillsboro, OR 97124-5961 Telephone: 503 264 4987 FAX: 503 264 3375 Internet: [email protected] Intended usage: COMMON Author/Change controller: SMPTE (http://www.smpte.org)