[x3d-public] X3D Semantic Web Working Group 14 FEB 2019: workshop planning, geometric relationships

Brutzman, Donald (Don) (CIV) brutzman at nps.edu
Thu Feb 14 10:44:18 PST 2019


6.0. Attendees Jakub Flotynski, Athanasios Malamos, Anita Havele, Don Brutzman.

	Web3D Teleconference Information
	http://www.web3d.org/member/teleconference-information

Prior minutes, Jakub and Athanasios:
	[x3d-public] X3D Semantic Web Working Group minutes, 17 JAN 2019: structural and conceptual semantics
	http://web3d.org/pipermail/x3d-public_web3d.org/2019-January/009898.html

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6.1 *Working group information*

The X3D Semantic Web Working Group is a Web3D Consortium member-only group that does most of its business openly on the x3d-public mailing list.

	X3D Semantic Web Working Group Charter
	http://www.web3d.org/working-groups/x3d-semantic-web/charter

	X3D Semantic Web Working Group
	http://www.web3d.org/working-groups/x3d-semantic-web

"The X3D Semantic Web Working Group mission is to publish models to the Web using X3D in order to best gain Web interoperability and enable intelligent 3D applications, feature-based 3D model querying, and reasoning over 3D scenes."

	semantics at web3D.org
	http://web3d.org/mailman/listinfo/semantics_web3d.org

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6.2 *Working group assets*

Don will work on the following website pages for saving further resources.  Working group co-chairs will have permission to edit.

	X3D Semantic Web Public Assets
	http://www.web3d.org/x3d-semantic-web-public-assets

	X3D Semantic Web Member Assets
	http://www.web3d.org/member/wiki/x3d-semantic-web-member-assets

Inputs welcome to begin building and structuring these important lists of assets.

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6.3 *Workshop opportunities*

We think that the current activity can likely be a contribution at the upcoming

	First Eurographics-EuroVR Workshop on Semantic 3D Content
	6 May 2019 in Genova Italy as part of EuroGraphics 2019
	http://semantic3d.org/workshop
	Paper/poster/demonstration submission deadline: 3 March 2019

We discussed what a good follow-on might be for Web3D 2019 Conference.  Perhaps another workshop, or simply a meeting, on X3D Semantic Web Working Group.  This could build on the EuroGraphics 2019 momentum, disseminate progress among participants and set us up for much expected work to emerge in the coming year.

	WEB3D 2019: 24th International ACM Conference on 3D Web Technology
	26-28 July 2019, Colocated with SIGGRAPH2019, Los Angeles California USA
	http://www.web3d.org/event/web3d-conference-2019
	http://web3d2019.web3d.org

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6.4 Primary work: *slideset Semantic X3D - thoughts and ideas*

Much detailed architectural work is in progress, distilled in these slides.

https://docs.google.com/presentation/d/1fCMu0V-zRAfJqFId7QIMyLh2EOCr5Qgl63MqqyFk6JM/edit?ts=5c5c6903

Thanos said “sitting in my corner” ... Can we define a property for “corner” based on geometric relationships?  Good to think about.

Candidate geometric properties:
* Primitive shapes: Rectangular, Conical, Cylindrical, Spherical, Ellipsoid, Point, Line, Mesh
* Side, TopSide BottomSide LeftSide RightSide FrontSide BackSide
* ParametricSurface, NURBS, BREP, other types?
* Characteristics: Irregular, Open, Closed (Watertight), Corner, Seam, Wall
* Angular relationships: Perpendicular, Acute, Obtuse

Does there already exist a set of 3D property classes related to shape of models?

We discussed relationships and 3D functions for extraction of semantic information from geometric shapes so we could specify possible goals of our works:
* Extraction of semantic information from X3D models (re-visit MPEG7)
* Generating X3D models on the basis of semantic 3D models (conceptual)
* Likely an iterative process, OWL inference can generate more RDF properties
* Semantic annotation (description) of X3D (without representation)

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6.5 MPEG-7

We briefly discussed prior work with MPEG-7.

	MPEG-7 - Wikipedia
	https://en.wikipedia.org/wiki/MPEG-7

"MPEG-7 is a multimedia content description standard. It was standardized in ISO/IEC 15938 (Multimedia content description interface). This description will be associated with the content itself, to allow fast and efficient searching for material that is of interest to the user. MPEG-7 is formally called Multimedia Content Description Interface. Thus, it is not a standard which deals with the actual encoding of moving pictures and audio, like MPEG-1, MPEG-2 and MPEG-4. It uses XML to store metadata, and can be attached to timecode in order to tag particular events, or synchronise lyrics to a song, for example.

It was designed to standardize:
* a set of Description Schemes ("DS") and Descriptors ("D")
* a language to specify these schemes, called the Description Definition Language ("DDL")
* a scheme for coding the description

The combination of MPEG-4 and MPEG-7 has been sometimes referred to as MPEG-47."

Thanos will look up whether licensing or patents have been declared.

	MPEG Licensing Authority
	https://www.mpegla.com

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Steady interesting progress, thanks colleagues!

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


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