[x3d-public] X3D Semantic Web agenda 26 JAN 2021: new book, charter goals, X3D Ontology, new SPARQL queries for meta information
Don Brutzman
brutzman at nps.edu
Sat Jan 23 17:17:20 PST 2021
Jakub and I meet weekly for X3D Semantic Web Working Group. Tuesday's agenda follows.
* Tuesday 26 JAN 2021, 0800-0845 pacific
https://us02web.zoom.us/j/81634670698?pwd=a1VPeU5tN01rc21Oa3hScUlHK0Rxdz09
1. Goals
Congratulations again to Jakub for recent publication of his book!
========================================
[1] Jakub Flotyński, Knowledge-Based Explorable Extended Reality Environments, Springer, 2020.
https://www.springer.com/gp/book/9783030599645
Describes the concept, architectures, methods and tools for the spatial-temporal composition of XR environments.
This book presents explorable XR environments—their rationale, concept, architectures as well as methods and tools for spatial-temporal composition based on domain knowledge, including geometrical, presentational, structural and behavioral elements. Explorable XR environments enable monitoring, analyzing, comprehending, examining and controlling users’ and objects’ behavior and features as well as users’ skills, experience, interests and preferences.
The E-XR approach proposed in this book relies on two main pillars. The first is knowledge representation technologies, such as logic programming, description logics and the semantic web, which permit automated reasoning and queries. The second is imperative programming languages, which are a prevalent solution for building XR environments. Potential applications of E-XR are in a variety of domains, e.g., education, training, medicine, design, tourism, marketing, merchandising, engineering and entertainment.
The book’s readers will understand the emerging domain of explorable XR environments with their possible applications. Special attention is given to an in-depth discussion of the field with taxonomy and classification of the available related solutions. Examples and design patterns of knowledge-based composition and exploration of XR behavior are provided, and an extensive evaluation and analysis of the proposed approach is included.
This book helps researchers in XR systems, 3D modeling tools and game engines as well as lecturers and students who search for clearly presented information supported by use cases. For XR and game programmers as well as graphic designers, the book is a valuable source of information and examples in XR development. Professional software and web developers may find the book interesting as the proposed ideas are illustrated by rich examples demonstrating design patterns and guidelines in object-oriented, procedural and declarative programming.
========================================
We will review working group charter goals for our X3D Ontology efforts, looking for paths forward that include and complement the approaches in this book.
[1.2] X3D Semantic Web Working Group
https://www.web3d.org/working-groups/x3d-semantic-web
[1.3] X3D Semantic Web Working Group Charter
https://www.web3d.org/working-groups/x3d-semantic-web/charter
---
2. X3D Ontology Improvements
[2] X3D Ontology for Semantic Web
https://www.web3d.org/x3d/content/semantics
a. fixed an error in the ontology with some of the enumeration types, the ontology just had a solitary ":" instead of ":listOfEnumerationValues" and so it was just a blank node.
b. have added topic-sentence descriptions to every field, taken from X3D Tooltips. That should aid user understanding of term relevance and comprehension of queries.
---
3. New X3D SPARQL Queries
a. Have updated layout of queries table, added bookmarks for easier reference plus some refinement of file naming.
[3] X3D Ontology for Semantic Web: Queries
https://www.web3d.org/x3d/content/semantics/semantics.html#Queries
---
b. Here is a new query that lists all document information found in head/meta
[4] HelloX3dAuthorsAnimationChain Queries
https://www.web3d.org/x3d/content/semantics/semantics.html#HelloX3dAuthorsAnimationChainQueries
These are interesting design patterns for using SPARQL effectively. This is excellent preparation for upcoming work to define queries to discover embedded Metadata* node values in a scene.
[5] AllDocumentMetaInformation Query/Response
https://www.web3d.org/x3d/content/semantics/queries/AllDocumentMetaInformation.rq.txt
###############################################
# AllDocumentMetaInformation.rq Query to identify all document meta information.
SELECT ?metaName ?metaContent
WHERE
{
?meta a x3do:meta ; # Shorthand expression: a = rdf:type
x3do:name ?metaName ;
x3do:content ?metaContent .
}
###############################################
---------------------------------------------------------------------------------------------------------------------------------------------
| metaName | metaContent |
=============================================================================================================================================
| "modified" | "20 October 2019" |
| "generator" | "X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit" |
| "description" | "Fully developed animation-chain example showing spinning globe and text: Hello!" |
| "title" | "HelloX3dAuthorsAnimationChain.x3d" |
| "identifier" | "http://X3dGraphics.com/examples/X3dForWebAuthors/Chapter07EventAnimationInterpolation/HelloX3dAuthorsAnimationChain.x3d" |
| "license" | "../license.html" |
| "creator" | "Don Brutzman" |
| "reference" | "https://www.web3d.org/x3d/content/examples/Basic/course/HelloX3dAuthorsAnimationChain.x3d" |
| "created" | "5 October 2000" |
---------------------------------------------------------------------------------------------------------------------------------------------
---
c. Here is another new query that lists all document meta information as specific properties.
[6] DocumentMetaProperties Query/Response
https://www.web3d.org/x3d/content/semantics/queries/DocumentMetaProperties.rq.txt
###############################################
# DocumentMetaProperties.rq Query to identify specific document meta properties of interest.
SELECT ?title ?creator ?created ?modified ?hasLicense ?hasDescription ?hasIdentifier ?hasReference
# additional properties available:
# ?hasTitle ?hasCreator ?hasCreated ?hasModified ?license ?description ?identifier ?reference
WHERE
{
OPTIONAL
{
?meta1 a x3do:meta ; # Shorthand expression: a = rdf:type
x3do:name ?name1 ;
x3do:content ?content1 .
FILTER (CONTAINS ( str(?name1), "title"))
BIND (str(?content1) AS ?title)
BIND ((STRLEN(?content1) > 0) AS ?hasTitle)
}
OPTIONAL
{
?meta2 a x3do:meta ;
x3do:name ?name2 ;
x3do:content ?content2 .
FILTER (CONTAINS ( str(?name2), "creator"))
BIND (str(?content2) AS ?creator)
BIND ((STRLEN(?content2) > 0) AS ?hasCreator)
}
OPTIONAL
{
?meta3 a x3do:meta ;
x3do:name ?name3 ;
x3do:content ?content3 .
FILTER (CONTAINS ( str(?name3), "created"))
BIND (str(?content3) AS ?created)
BIND ((STRLEN(?content3) > 0) AS ?hasCreated)
}
OPTIONAL
{
?meta4 a x3do:meta ;
x3do:name ?name4 ;
x3do:content ?content4 .
FILTER (CONTAINS ( str(?name4), "modified"))
BIND (str(?content4) AS ?modified)
BIND ((STRLEN(?content4) > 0) AS ?hasModified)
}
OPTIONAL
{
?meta5 a x3do:meta ;
x3do:name ?name5 ;
x3do:content ?content5 .
FILTER (CONTAINS ( str(?name5), "license"))
BIND (str(?content5) AS ?license)
BIND ((STRLEN(?content5) > 0) AS ?hasLicense)
}
OPTIONAL
{
?meta6 a x3do:meta ;
x3do:name ?name6 ;
x3do:content ?content6 .
FILTER (CONTAINS ( str(?name6), "description"))
BIND (str(?content6) AS ?description)
BIND ((STRLEN(?content6) > 0) AS ?hasDescription)
}
OPTIONAL
{
?meta7 a x3do:meta ;
x3do:name ?name7 ;
x3do:content ?content7 .
FILTER (CONTAINS ( str(?name7), "reference"))
BIND (str(?content7) AS ?reference)
BIND ((STRLEN(?content7) > 0) AS ?hasReference)
}
OPTIONAL
{
?meta8 a x3do:meta ;
x3do:name ?name8 ;
x3do:content ?content8 .
FILTER (CONTAINS ( str(?name8), "identifier"))
BIND (str(?content8) AS ?identifier)
BIND ((STRLEN(?content8) > 0) AS ?hasIdentifier)
}
}
###############################################
------------------------------------------------------------------------------------------------------------------------------------------------------------
| title | creator | created | modified | hasLicense | hasDescription | hasIdentifier | hasReference |
============================================================================================================================================================
| "HelloX3dAuthorsAnimationChain.x3d" | "Don Brutzman" | "5 October 2000" | "20 October 2019" | true | true | true | true |
------------------------------------------------------------------------------------------------------------------------------------------------------------
# additional properties available:
# ?hasTitle ?hasCreator ?hasCreated ?hasModified ?license ?description ?identifier ?reference
Speculation: perhaps at some point we can make it easy to import and load all of these kinds of properties in a reusable common-queries SPARQL file.
---
Have fun with X3D and Semantic Web! 8)
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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