more properties for the location class (was Re: locating assertions in non-text based formats)


Based on Christophe's findings in PDF and Flash, I suggest adding the
following properties to earl:location (which is still in discussion

* earl:page - to help describe the location in word processor formats 

* earl:frame - to help describe the location in frame-based formats (eg.
multimedia presentations)

* earl:time - to help describe the location in a time-based format (eg.
audio files)

What do people think of that?


-----Original Message-----
From: On Behalf Of Christophe Strobbe
Sent: Monday, April 25, 2005 11:52
To: Nils Ulltveit-Moe
Subject: Re: locating assertions in non-text based formats (was Re:
About locating subject results and context)

Hi Nils and All,

At 23:37 23/04/2005, Nils Ulltveit-Moe wrote:
>Hi Shadi,
>This page shows a bit about accessibility and PDF:
>Pointing into formats like Flash or PDF is not easy to achieve in a
>general way, since the underlying format is unknown, proprietary and in
>some cases binary. The formats act more like programming languages than
>a traditional document format. 

The specification of Adobe PDF is proprietary but available at
The PDF 1.5 spec is a "mere" 1149 pages long; I haven't checked the
current version (1.6).
The specification for Macromedia Flash (or should I now way Adobe
can be downloaded when you agree to a license agreement 
that says you can "use the Specification for the sole purposes of
Products that output SWF" (i.e. not for developing products that check
accessibility problems??).
An ActionScript Language Reference can be downloaded from, but I 
think this is less useful for our purposes.


Christophe Strobbe


Christophe Strobbe
K.U.Leuven - Departement of Electrical Engineering - Research Group on
Document Architectures
Kasteelpark Arenberg 10 - 3001 Leuven-Heverlee - BELGIUM
tel: +32 16 32 85 51 

Received on Thursday, 28 April 2005 13:56:43 UTC