[x3d-public] Proposal for MetadataVersion (like MetadataSet), any number of dimensions

[John Carlson]

One can also think about providing different versions to prototypes and
protoinstances.

Hmm!

John

On Thu, Apr 3, 2025 at 8:00 AM John Carlson <yottzumm at gmail.com> wrote:

> This seems relevant:
>
> https://3drepo.com/wp-content/uploads/2022/02/xml3drepo.pdf
>
> I’m interested in versioning some objects, not necessarily a whole
> document.   The question is, how to define a versioned collection of
> objects in an X3D encoding, particularly JSON.
>
> I’m also interested in temporal logic for a 3D graph (humanoid),
> potentially for HIPAA data.
>
> John
>
> On Thu, Apr 3, 2025 at 7:33 AM John Carlson <yottzumm at gmail.com> wrote:
>
>> I’m thinking that adding a sequence or index field to MetadataVersion may
>> be appropriate, if not MetadataInteger..  Also, add a MetadataTime
>> node/statement as well, but a generic set of fields for metadata rears its
>> head  again, but I’m not doing it yet.
>>
>> Ideally, we could store events in a time series data store, potentially
>> gathered from multiple sources.   Scripts might do that, but a way to
>> replay events might be needed/ helpful.
>>
>> Traditional source code repositories are line oriented.  I’m aiming for a
>> versioned object store, like recording animation.   If a program is an AST,
>> I’m working on saving changes to the AST.
>>
>> Think about it.
>>
>> John
>>
>> On Wed, Apr 2, 2025 at 11:49 PM John Carlson <yottzumm at gmail.com> wrote:
>>
>>> I want 2 more fields beyond MetadataSet, below.
>>>
>>> I want a MetadataVersion to call it out as different from MetadataSet.
>>>
>>> I realized that I can give the MetadataSet a "version" name.
>>>
>>> I also want to achieve a crontab-like or scheduling feature.
>>>
>>> Ideally, I could provide field-like nodes or statements for version information separate from axes.
>>>
>>> The idea is to create a vector-like object to maintain time series data
>>>
>>> and version data, and for building information, bill or materials, etc.  There may already be something in X3D,
>>>
>>> but I've not spotted it yet...CAD?
>>>
>>> The goal is to put this into a SQL database, such that I can input and output different versions of the JSON or JSON objects and arrays, watch the JSON change through time, etc.  The whole history of the document is stored.
>>>
>>>
>>> If the axes field is unacceptable, can we have a version field in MetadataSet?
>>>
>>>
>>> Basically, I need a way to separate version and dimensional data from ordinary MetadataSets.
>>>
>>> MetadataVersion: MetadataSet
>>>
>>> {
>>>
>>>   MFNode axes NULL [X3DMetadataObject]
>>>
>>>   MFString version '"0"'
>>>
>>> // Add everything from MetadataSet.
>>>
>>> // Default containerField is axes, not value or metadata.
>>> }
>>>
>>> Possible axes are below:
>>>
>>> <MetadataVersion version='"A"'>
>>>
>>> <MetadataVersion version='"1" "b"'>
>>>
>>> <MetadataInteger name="count" value="3"/>
>>>
>>> <MetadataDouble  name="quantity" value="3.5"/>
>>>
>>> <MetadataString  name="unit" value='"mg"'/>
>>>
>>> <MetadataDouble name="mg" value="0.4"/>
>>>
>>> <MetadataDouble name="x" value="1.0"/>
>>>
>>> <MetadataDouble name="y" value="4.0"/>
>>>
>>> <MetadataDouble name="z" value="9.0"/>
>>>
>>> <MetadataInteger name="century" value="2000"/>
>>>
>>> <MetadataInteger name="score" value="20"/>
>>>
>>> <MetadataInteger name="decade" value="20"/>
>>>
>>> <MetadataInteger name="year" value="2025"/>
>>>
>>> <MetadataInteger name="decade" value="20"/>
>>>
>>> <MetadataInteger name="month" value="4"/>
>>>
>>> <MetadataInteger name="fortnight" value="3"/>
>>>
>>> <MetadataInteger name="week" value="6"/>
>>>
>>> <MetadataInteger name="day" value="2"/>
>>>
>>> <MetadataInteger name="pm" value="10"/>
>>>
>>> <MetadataInteger name="24" value="22"/>
>>>
>>> <MetadataInteger name="minute" value="51"/>
>>>
>>> <MetadataInteger name="second" value="0"/>
>>>
>>> <MetadataDouble name="subsecond" value="0.0025"/>
>>>
>>> </MetadataVersion>
>>>
>>> </MetadataVersion>
>>>
>>>
>>>
>>>
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