1. May 14 (Wed) Masatoshi Ohishi (Japan)
What conditions are required to develop IVOQL, considering future extension
May 14 (Wed)
Masatoshi Ohishi (Japan)

2. 1. Astronomers Needs
VOQL has to be able to express what astronomers want to “observe”.
Sky coordinates, frequency/wavelength/energy, observed time, time intervals, quality of data, ・・・
DBs 　　　　　　　Instruments
QLs Observation Sequences
Cross-Match: frequency and time domains
AND, XOR, ・・・
Arithmetic operations / conditions

3. Telescope is
behind me !

4. Real Observations Virtual Observations IDEA Observations Query DATA
ANALYSIS
REPORT
Real Observations
Virtual Observations

5. 2. Independent from Metadata
When parsing VOQL, the parser asks the
metadata / registry server to solve unknown references (DB locations, etc.). Therefore VOQL needs to be independent from the metadata and/or registry.
The independence will guarantee extensibility of the VOQL.

6. Parse the JVO QL into each query sequence
Query request
Web
Broser
JVO Query Language
利用者独自
サービス
Catalog Query Service
ASTRONOMER
JVO
Browser
Viewer
Commands callable from GT2
JVO
Portal
Parse the JVO QL into each query sequence
Catalog DB
Data Archive Service
JVO
Contoroller
skycat
Globus
Toolokit V2
Data Management DB
Data
GridFTP each query
UDDI Server
（FreeSoft)
Resolve servers to request queries
　　Globus Toolkit
Service
Registry
Data Analysis Services
Security Service
Resource Management
Data Management

7. 3. GUI + CUI for VOQL For beginners, GUIs are powerful.
VOQL needs an easy GUI entry form
For advanced users, GUIs are annoying (?)
CUIs are necessary
VOQL has to be easy to learn

10. Query Files can be stored in a local PC (WS)

11. Upper Compatibility to DBMS Queries
A VOQL will be parsed into individual queries to each DBMS expressed by SQLs or other languages, and another VOQL to pass to other VOs.
“Upper compatibility to ,e.g., SQL will ensure future extensibility.”, an expert of DBMS, Prof. Masunaga, said.

12. How many analysis functions need be involved in VOQL ?
DB query only ?
MUSTs: cross-match, arithmetic operation
e.g., line identifications referring to line DB ?
and others ?

14. Your suggestions are needed !
And else ?
Your suggestions are needed !