RE: [cgmo-webcgm] DOM question

["Dieter Weidenbrueck" <dieter@itedo.com>]

Benoit,

see below.

>-----Original Message-----
>From: Benoit Bezaire [mailto:benoit@itedo.com]
>Sent: Monday, July 05, 2004 7:45 PM
>To: Dieter Weidenbrueck
>Cc: CGM Open Technical Committee
>Subject: Re: [cgmo-webcgm] DOM question
>
>
>Hi All,
>
>  I've attached 3 files (2 svg files and 1 html).  Save all three
>  files somewhere and open viewers.html.  I'm using an SVG example
>  since the same concept will apply for our WebCGM DOM.
Agreed.
>
>  BTW, the wording of the spec should be changed; the 'name'
>  attribute in xhtml has been deprecated... it has been replace with
>  XML:ID.  Therefore, to address a specific 'object', a user should be
>  referencing the unique 'id'.
one more defect for Lofton

>
>  One I'm not a 100% sure about this part of the wording below:
>  "However, the specific syntax for addressing a specific CGM in an
>  HTML page is not standardized.", in my example I know that
>  everything after "document." is completely standardized.  I just
>  can't find where the W3C says that a global object called 'document'
>  is the DOM entry point.
When we wrote WebCGM 1.0 there was no DOM, hence the addressing of a
WebCGM viewer was restricted to sending a URL to a frame or window.
This would only work of course if the CGM took up the entire frame or
window.
And even this method did not adress a viewer but rather a container for
a viewer, IE would drop the content of that container and then create
a new viewer to show the file with the new URL.

So the wording should probably be changed to:
"...The CGM defined by the object tag can be uniquely addressed using the
<XML:ID> parameter of the object tag. The WebCGM DOM can then be used to
manipulate that specific viewer."

One question: Should we add some words about grandfathering of the
"name" attribute of the object tag to ensure upward compatibility?

>
>  Does this help?
It does.

Thanks a lot,
Dieter

>
>  Cheers,
>
>--
> Benoit   mailto:benoit@itedo.com
>
>
>Monday, July 5, 2004, 7:27:07 AM, Dieter wrote:
>
>DW> All,
>DW>  
>DW> the WebCGM Recommendation says:
>DW>  
>DW> 3.1.4 Addressing one of several viewers from HTML
>
>DW> Often, applications will display several pictures in a single
>DW> HTML page. The only way to address the cgm viewer instance that is
>DW> responsible for the display of a particular picture is via the
>DW> "object" tag defined in HTML 4.0. The CGM defined by the object
>DW> tag can be uniquely addressed using the <name> parameter of the
>DW> object tag. However, the specific syntax for addressing a specific
>DW> CGM in an HTML page is not standardized.
>
>DW> The Document Object Model (DOM) is currently under
>DW> development. This work, when completed, is expected to provide a
>DW> standard basis for addressing this problem.
>
>DW>  
>
>DW> Question: How do we address this problem using the DOM as it
>is written in the spec?
>
>DW> Comments?
>
>DW> Regards,
>
>DW> Dieter
>
>