[x3d-public] Finding more than one use of a DEF in VRML - Chisel, duplicated DEF in proto

[John Carlson]

John sniffs at rabbit hole.  "No rabbit here anymore."

So who's the chesire cat? Wipe that grin off your face!

ID only applies to XML, I suppose!

John

On Thu, Mar 26, 2020 at 10:54 AM John Carlson <yottzumm at gmail.com> wrote:

> As mentioned on other thread:
>
> https://www.web3d.org/x3d/content/X3dTooltips.html#ID
>
> "*ID <https://www.w3.org/TR/REC-xml/#sec-attribute-types>* is a NMTOKEN
> that is unique within the scene, corresponding to the DEF attribute in X3D.
>  "
>
> This would mean that the DEF attribute is unique within a scene?  Or no?
>
> Help!   The sky is falling!
>
> John
>
> On Thu, Mar 26, 2020 at 9:26 AM Don Brutzman <brutzman at nps.edu> wrote:
>
>> On 3/25/2020 7:11 PM, GPU Group wrote:
>> > Chisel? "it was simply put in the public domain by Trapezium when they
>> folded many years ago. They didn¹t specify any license" - Louka
>> > http://dug9.users.sourceforge.net/web3d/temp/chisel-src.zip
>>
>> Also
>>
>> * X3D Resources: Conversions and Translation Tools
>>
>> https://www.web3d.org/x3d/content/examples/X3dResources.html#Conversions
>>
>> * 15. Chisel VRML Optimisation Tool
>>    http://www2.hrp.no/vr/tools/chisel/install.htm
>>
>>    with autoinstaller
>>    http://www2.hrp.no/vr/tools/chisel/install.htm
>>
>>    and documentation
>>    http://www2.hrp.no/vr/tools/chisel/doc/index.html
>>
>>    provided by Halden Virtual Reality Centre.
>>    http://www2.hrp.no/vr/about/index.html
>>
>>    Originally built by Trapezium and maintained by NIST.
>>    http://ovrt.nist.gov/chisel.html
>>    (link no longer working, hoping to find replacement)
>>
>> > But I suspect double-deffing isn't illegal. I think I've been through
>> it, and different browsers honored the first or last definition.
>> > -Doug
>>
>> Agreed.  Although it is legal in X3D abstract specification and in
>> VRML/ClassicVRML encodings, it leads to validation difficulties in XML (and
>> at some point JSON when JSON Schema is finished).
>>
>> Wondering if we should define a suggested practice for de-duplicating DEF
>> names within a proto, e.g.
>>
>>         MyWhizzyProto includes DEF SomeDuplicatedName
>>
>> might get tidied up to globally rename
>>
>>         MyWhizzyProto includes DEF MyWhizzyProto.SomeDuplicatedName
>>
>> We might also apply this in the PrototypeExpander work if that gets
>> revisited.
>>
>> Thoughts?
>>
>> > On Wed, Mar 25, 2020 at 7:43 PM John Carlson <yottzumm at gmail.com
>> <mailto:yottzumm at gmail.com>> wrote:
>> >
>> >     That is, more than one DEF with the same value.
>> >
>> >     I realize that separate PROTOs may have the same DEF due to
>> namespaces. Unfortunately writing a Unix script to find this takes massive
>> brain power.
>> >
>> >     John
>> >
>> >     On Wed, Mar 25, 2020 at 8:37 PM John Carlson <yottzumm at gmail.com
>> <mailto:yottzumm at gmail.com>> wrote:
>> >
>> >         I’m not particular looking for a vrml parser unless it catches
>> double use of a DEF.
>>
>> all the best, Don
>> --
>> Don Brutzman  Naval Postgraduate School, Code USW/Br
>> brutzman at nps.edu
>> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA
>>  +1.831.656.2149
>> X3D graphics, virtual worlds, navy robotics
>> http://faculty.nps.edu/brutzman
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20200326/4517bf05/attachment.html>