What conditions are What conditions are required to develop IVOQL, required to develop IVOQL,

considering future considering future extensionextension

May 14 (Wed)May 14 (Wed)

Masatoshi Ohishi (Japan)Masatoshi Ohishi (Japan)

1. Astronomers Needs1. Astronomers Needs• VOQL has to be able to express what astronome

rs 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

Telescope isbehind me !

IDEA IDEA

Observations Query DATA DATA

ANALYSIS ANALYSIS

REPORT Real Observations

Virtual Observations

2. Independent from Metadata2. 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.

JVOPortal

JVOPortal

Catalog Query ServiceCatalog Query Service

　　 Globus Toolkit

Catalog DB

ServiceRegistry

ServiceRegistry

ASTRONOMER

JVOBrowser

JVOBrowser

JVOViewer

JVOViewer

Data Archive ServiceData Archive Service

Data ManagementDB

Data

JVOContoroller

JVOContoroller

利用者独自サービス利用者独自サービス

Data Analysis ServicesData Analysis Services

UDDI Server（ FreeSoft)

WebBroser

Commands callable from

GT2

GlobusToolokit V2

Security ServiceSecurity Service Resource ManagementResource Management Data ManagementData Management

skycat

Query request

JVO Query Language

Parse the JVO QL into each query sequence

Resolve servers to request queries

GridFTP each query

3. GUI + CUI for VOQL3. 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

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

Upper Compatibility to DBMS Upper Compatibility to DBMS QueriesQueries

• 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.

How many analysis functions need How many analysis functions need be involved in VOQL ?be involved in VOQL ?

• Functions ? DB query only ? MUSTs: cross-match, arithmetic operation

e.g., line identifications referring to line DB ?

and others ?

And else ?

Your suggestions are needed !