Transcript XMSF X3D Overview, Websim 2003

Joint Synthetic Battlespace (JSB) Technical Exchange
Hanscomb AFB, 12 November 2003
Extensible Modeling and Simulation Framework
Extensible 3D Graphics (X3D)
Don Brutzman
MOVES Institute, Naval Postgraduate School
Andreas Tolk
VMASC, Old Dominion University (ODU)
Recommendations for a Framework ensuring
Interoperability, Reusability, & Composability
A Framework for Interoperability,
Reusability, and Composability
Without the necessary management processes,
technical solutions are point solutions in time only
valid until the next change (update, upgrade, etc.)
Alignment of Management is necessary
To Enable meaningful interoperability on the
simulation system level, composable models on
the conceptual level are necessary
Common Conceptual Modeling is necessary
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
3
Recommended Solution for JSB
Three columns of JSB
1. An overarching Engineering Approach
applicable to existing and future simulation
components including migration concepts;
2. Establishing a Resource Repository
comprising these Components and the
necessary Meta-Models;
3. Alignment of the Management Processes
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
4
JSB Column 1 –
A Common Engineering Approach
Requirements for the Integration Framework
 Support Future Emerging Simulation Needs
 Applicable for Future Components
 Migration for Legacy Components
 Supporting Integration of Real World Components
(C4ISR, Platforms, Sensors, etc.)
The JSB Integration Framework must be a
conceptually stable solution independent from
technical implementations, but commercially
supported
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
5
JSB Column 1 –
A Common Engineering Approach
Recommended Backbone – Application of the Model Driven
Architecture (MDA) of the Object Management Group (OMG)
 Implementation independent Modeling
based on the Unified Modeling Language
(UML)
 Implementation independent Data and
Object Modeling based on the Common
Warehouse Meta-Model (CWM)
 Implementation independent Repository
Description based on the Meta-Object
Facility (MOF)
The MDA embraces technical implementations and standards, such as
web services, XML, EJB, SOAP, CORBA, etc.
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
6
JSB Column 1 –
A Common Engineering Approach
The model hierarchy of the Model Driven Architecture (MDA)

Platform Independent Model (PIM);
conceptual model resulting from
requirement analysis (“What to model”)

Platform Specific Model (PSM);
implementation oriented version
(“How to implement”)

PIM
PSM
Code/Implemented Component
Code
The MDA connects conceptual and implementation level of the
components => Bridging Management and Implementation
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
7
JSB Column 2 –
Resource Repository
Level of
Interoperability
Description
Examples
Technical Level
Connectivity established to
exchange bits and bytes
Physical Connections,
Network Layers
Syntactical Level
Data can be exchanged in
standardized formats
HLA OMT, CORBA IDL,
DIS PDU, XML, WSDL
Semantic Level
Data in its contexts can be
exchanged (unambiguous
understanding of data)
Reference Data Models
(C2IEDM)
Pragmatic Level
Information, I.e., data and
its use in the component,
can be exchanged
Reference Models in UML
XMI, or MOF
Conceptual Level
Common view of the world,
system-of-systems wide
conceptual model
Common Conceptual
Models (in UML, XMI, or
MOF)
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
8
JSB Column 2 –
Resource Repository
The Resource Repository must comprise not only the component,
but also the meta-data describing the component on the various
levels of interoperability
Recommendation:
Use the MDA as the Framework for the JSB Repository
 Component as Code (executable)
 Include PSM (“White Box” of implementation without having to
enforce open source)
 Include PIM (Contribution to the Common Conceptual Model)
 Gradual Development of a common conceptual view of the mission
space of JSB
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
9
JSB Column 3 –
Aligning Management Processes
Common Data Engineering as the first Step:
 Data Administration – Managing Information Exchange needs,
I.e., which data are where in which format
WSDL and UDDI support Data Administration
 Data Management – Managing of unambiguous interpretation,
I.e., which data mean what
C2IEDM/Generic Hub support Data Management
 Data Alignment – Managing of mapping of data sources to data
targets, I.e., is all necessary data available
XML enables efficient Data Alignment
 Data Transformation – Technical mapping of source data format
to target data format
XSLT enables Data Transformation
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
10
JSB Column 3 –
Aligning Management Processes
 Each project must be embedded into the overarching
JSB processes
 Each project reuses JSB components (mandatory)
 Each project contributes to the JSB components
(at least on the conceptual level by adding with its
PIM to the Common Conceptual View of the
JSB Mission Space)
 All projects are orchestrated by an Overarching
Integrated Product Development Team
JSB orchestrates the heterogeneous implementations
by aligning conceptual contributions to enable
homogeneous training and support to operations
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
11
Initial Recommendations
1.
2.
3.
4.
5.
6.
What is necessary to enable a fast JSB start
avoiding running into dead ends?
Use open standards in an orchestrated way
Establish an independent advisory board
Document management processes for evaluation and
deriving of a guide
XML Namespace Management as a requirement for
common data engineering
Start to develop PIM for the Common Conceptual
View of the JSB Mission Space
Participate actively in open standard communities
efforts for JSB (OGC, OMG, SISO, W3C, Web3D)
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
12
Contact NPS
Don Brutzman
[email protected]
http://web.nps.navy.mil/~brutzman
Code UW/Br, Naval Postgraduate School
Monterey California 93943-5000 USA
1.831.656.2149 voice
1.831.656.3679 fax
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
13
Contact ODU
Andreas Tolk
[email protected]
http://myprofile.cos.com/atolk
Virginia Modeling Analysis & Simulation Center
Old Dominion University
Norfolk, VA 23529
1.757.686.6203 (voice)
1.757.686.6214 (fax)
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
14
Contacts XMSF
http://www.MovesInstitute.org/xmsf
Don Brutzman
Michael Zyda
Don McGregor
Andrzej Kapolka
[email protected]
[email protected]
[email protected]
[email protected]
831.656.2149
831.656.2305
831.656.4090
831.656.2253
Mark Pullen
[email protected]
703.993.1538
Katherine Morse
David Drake
Ryan Brunton
[email protected]
[email protected]
[email protected]
858.826.6728
858.826.2278
Andreas Tolk
Bowen Loftin
[email protected]
[email protected]
757.686.6203
757.686.6200
XMSF/X3D Overview, JSB Technical Briefings
12 November 2003
15