RE: [ink] Responses to your comments on the W3C InkML Working Draft

Hello Dominique,

Thank you for your responses.

Regarding Comment #165 about the "DefaultCanvas" reserved id:  I have added language to the spec to explicitly describe the id "DefaultCanvas" as being reserved and therefore unavailable to be used as the id of a user defined <canvas> element.   The same applies to the "DefaultContext" reserved id, so I also added language for that id.   The "DefaultTraceFormat" id already had language describing it as reserved.

The last paragraph in section 4.5 changed to:
 The default context may be explicitly specified using the URI "#DefaultContext". The id "DefaultContext" is therefore reserved and may not be used as the id of a user defined <context> element.
The last paragraph in section 5.3 changed to:
 The default canvas may be explicitly specified using the URI "#DefaultCanvas". The id "DefaultCanvas" is therefore reserved and may not be used as the id of a user defined <canvas> element.

Regarding Comment #173 about the schema not allowing channel names to repeat within a file: my apologies, when I read the comment I didn't catch that it was a comment against the schema, not the spec.   You are absolutely right, the schema is broken.   I removed the key/keyref from the XSD.   The latest XSD is attached.

-----Original Message-----
From: Dominique Hazael-Massieux [mailto:dom@w3.org] 
Sent: Monday, August 30, 2010 1:39 AM
To: Tom Underhill
Cc: www-multimodal@w3.org; smwatt@gmail.com
Subject: Re: [ink] Responses to your comments on the W3C InkML Working Draft

Le lundi 30 août 2010 à 00:14 +0000, Tom Underhill a écrit :
> ============
> Comment #152:
> ------------
> * the abstract says that InkML is for "in the W3C Multimodal 
> Interaction Framework as proposed by the W3C Multimodal Interaction 
> Activity"; it looks to me that it is not restricted to that usage, so 
> I would remove that phrase
> ------------
> Resolution: accepted
> ------------
> Changed to:
> 
> This document describes the syntax and semantics for the Ink Markup 
> Language.  The Ink Markup Language serves as the data format for 
> representing ink entered with an electronic pen or stylus. The markup 
> allows for the input and processing of handwriting, gestures, 
> sketches, music and other notational languages in applications. It 
> provides a common format for the exchange of ink data between 
> components such as handwriting and gesture recognizers, signature 
> verifiers, and other ink-aware modules.  It may be used in the W3C 
> Multimodal Interaction Framework as proposed by the W3C Multimodal 
> Interaction Activity.

It's an improvement, thanks; I think it's a bit long, but clearly this is up to your editorial discretion :)

> Comment #165:
> ------------
> * the existence of DefaultCanvas (5.3) means that this id cannot be 
> used anywhere else as id in an InkML document ; that should probably 
> highlighted much more visibly; wouldn't it make more sense to have 
> that URI a non-relative URI, but a well-known URI à la 
> http://www.w3.org/ns/inkml/canvas#default ?
> ------------
> Resolution: rejected
> ------------
> There are already implementations the use "#DefaultCanvas"

How do they react when an element in an InkML file as an id of "DefaultCanvas"?

In any case, even if the spec isn't changed (which seems sub-optimal to me), I strongly recommend calling out explicitly the restriction on the authorized ids. It probably ought to be added to the XML Schema as well if that's technically possible.


> Comment #173:
> ------------
> * the schema forbids having more than one <channel> element with the 
> name "X" (or "Y") - that seems like a bug (or the first example in 7.1 
> is buggy)
> ------------
> Resolution: rejected
> ------------
> You may not have more than one <channel> with the same name within a <traceFormat>.

That's not what the XML Schema enforces:
   <xsd:element name="ink" type="inkml:ink.type">
      <xsd:key name="channelNameKey">
         <xsd:selector xpath=".//inkml:channel"/>
         <xsd:field xpath="@name"/>
      </xsd:key>
says that no channel can have the same name anywhere in an InkML document.

HTH,

Dom