Document regarding span background height

All,

During today's meeting I mentioned a document that my colleague Chris Bass
from BBC R&D wrote on the span background issue, which may provide useful
background, including describing the wanted behaviour, the current
specification (via XSL-FO etc) and rendering, and a possible proposed
solution, with a short analysis of the impact on implementation and on
TTML2.

The document was first written for submission to the EBU's Subtitles in
XML group, and proposes a backgroundHeight attribute in an ebutts
namespace, however there is no reason why that could not be put into a tts
namespace if it is adopted at all - noting that as discussed today there
seems to be little opportunity to change the definition of the background
area from being the padding rectangle.

Kind regards,

Nigel



-----------------------------
http://www.bbc.co.uk

This e-mail (and any attachments) is confidential and
may contain personal views which are not the views of the BBC unless specifically stated.
If you have received it in
error, please delete it from your system.
Do not use, copy or disclose the
information in any way nor act in reliance on it and notify the sender
immediately.
Please note that the BBC monitors e-mails
sent or received.
Further communication will signify your consent to
this.
-----------------------------