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ATAG2 Action: re: encode continuous input

From: Jan Richards <jan.richards@utoronto.ca>
Date: Tue, 02 Mar 2010 10:11:01 -0500
Message-ID: <4B8D2A85.8030707@utoronto.ca>
To: WAI-AUWG List <w3c-wai-au@w3.org>
Hi all (especially Tim who has an action to review this),

My action was to "To flesh out the watercolor example with more details 
e.g. frequency and why it is practically hard to do with keyboard" - in 
doing this I also added a bit of wording around web content properties:

<UNCHANGED>
content (web content)
Information and sensory experience to be communicated to the end user by 
means of a user agent, including code or markup that defines the 
content's structure, presentation, and interactions. In ATAG 2.0, the 
term is primarily used to refer to the output that is produced by the 
authoring tool. Content produced by authoring tools may include web 
applications, including those that act as web-based authoring tools. 
Accessible web content is web content that conforms to a particular 
level of WCAG 2.0 (see Relationship to WCAG 2.0 section). Structured web 
content is content that includes machine-readable internal structure 
(e.g., markup elements), as opposed to unstructured content, such as 
raster image formats or plain human language text.
</UNCHANGED>
<NEW>
*Web content properties* are the individual pieces of information that 
make up the web content (e.g., the attributes and contents of elements, 
stylesheet information, etc.). While many web content properties have 
discrete values (e.g., a single value for size, color, font, etc.), some 
types of web content (especially graphics) may includes properties that 
can be said to *encode continuous input* because they incorporate 
frequent data samples (e.g., the location, speed, pressure, angle, etc. 
of a pointing device) . For example, a freehand line graphic object 
might have a "continuous" path property that encodes thousands of 
individual x-y location values, but "discrete" properties for setting 
the color and thickness of the line. A "watercolor stroke" graphic 
object might have multiple "continuous" properties (e.g., path, speed, 
pressure) in order to graphically mimic the diffusion effects that occur 
when a real paint brush is moved in a similar manner.
</NEW>



Cheers,
Jan
Received on Tuesday, 2 March 2010 15:11:34 GMT

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