[x3d-public] Registering NavigationInfo types as a means to facilitate formal evolution

[Don Brutzman]

Now added as Mantis 1358

* https://www.web3d.org/member-only/mantis/view.php?id=1358

On 4/16/2021 10:05 AM, Don Brutzman wrote:
> Ongoing inquiry and experimentation often leads to new NavigationInfo types.  For example:
> 
> ==========================
> [1] X3D4 Architecture, Navigation component, 23.4.4 NavigationInfo
> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD/Part01/components/navigation.html#NavigationInfo
> 
> NavigationInfo : X3DBindableNode {
> [...]
> MFString [in,out] type            ["EXAMINE" "ANY"] ["ANY","WALK","EXAMINE","FLY", "LOOKAT","NONE","EXPLORE",...]
> ==========================
> 
> Other types have been suggested/proposed for HELICOPTER, TURNTABLE, etc. but not quite yet accepted.
> 
> Dick had a good idea how we might regularize the future addition of these in X3D4, without requiring a new revision or amendment, by creating a registry of items.  Specifically:
> 
> ==========================
> [2] X3D4 Architecture, Concepts, 4.10 Component and profile registration
> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD/Part01/concepts.html#Componentprofilereg
> 
> 4.10 Component and profile registration
> 
> This part of ISO/IEC 19775 allows new concepts to be defined by registration of components, new levels within components, and profiles. Registration shall not be used to modify any existing component, level of a component, or profile. New functionality is registered using the established procedures of the ISO International Register of Items (1). These procedures require the proposer to supply all information for a new registered item except for the level number. The level number (if applicable) is assigned and managed by the ISO International Registration Authority for Graphical Items. Registration shall be according to the procedures in ISO/IEC 9973.
> 
> (1) Contact information for the ISO-designated Registration Authority for Items registered under the ISO/IEC 9973 procedures is available at the ISO Maintenance Agencies and Registration Authorities web site: https://www.iso.org/iso/standards_development/maintenance_agencies.htm
> ==========================
> 
> We currently reference and utilize the following in X3D:
> 
> [3] ISO/IEC JTC 1/SC 24, ISO/IEC 9973 Items Register
> https://www.iso.org/jtc1/sc24/register
> 
> * Hatchstyle Section
> * Linetype Section
> * Markertype Section
> 
> We might add NavigationInfo type as another registry section matching the existing types.  Adding new values (e.g. HELICOPTER, TURNTABLE, etc.) is straightforward and administered by our SC24 standards subcommittee.

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