XML Usage in an overall Space Information Architecture

1
XML Usage in an overall Space Information
Architecture

• D Giaretta, D Sawyer, L Reich, P Mazal, C Huc and
  N Peccia

2
Why XML

• Availability of COTS and Open Source software
• Vendor neutral
• Self-documenting to a large extent
• Avoids religious arguments about format details

3
What is special about Space Information?

• Tends to be difficult and expensive to acquire
• Multi-investigator, multi-national, publicly
  funded missions are common
• Stored systematically
• Multi-disciplinary investigations common data
  from many sources

4
How much metadata

• Driven by perspective of long-term usefulness of
  information
• Open Archival Information Systems (OAIS)
  Reference Model provides the basic concepts

5
Archival
Information
Package
Content
Information
interpreted
using

interpreted using
Representation
Data
Information
Object
1
adds
Physical
Digital
Structure
Semantic
meaning
Object
Object
Information
Information
6
Data Stream
7
Space Domain Functional Element View
Deposit Metadata
UNIQUE ID
Source OMG Space DTF
8
Areas of Applicability of XML

• Data Entity Dictionary Specification Language
  using XML/DTD, may be extended to XML Schema
• XML-based information Packaging
• CCSDS Registry/Repository standards buiding on
  Control Authority concepts

9
Space Domain
Relay Satellite
Spacecraft Telecom Config
Spacecraft / lander
Spacecraft and Scientific Instruments
Metadata Access
Data Distribution
External Science Community
Data Archive
Data/Information Distribution
Data Processing
Service Requests
Data Analysis and Modeling
Data Acquisition and Command
Mission Operations
Instrument /Sensor Operations
Ground System Telecom Config
Science Team
SLE RAF, RCF CLTU
10
Conclusions

• There is much effort going in to developments in
  XML and CCSDS Architecture
• The CCSDS work complements that being done in the
  XML world
• It is easy to see many areas where XML and its
  associated tools will be very beneficial to
  gathering,processing and archiving Space
  Information
• Several presentations later in this session
  demonstrate this