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VO Registry & China VO DAS

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Presentation on theme: "VO Registry & China VO DAS"— Presentation transcript:

1 VO Registry & China VO DAS
Chinese Virtual Observatory VO Registry & China VO DAS 路勇 中国虚拟天文台研发团队

2 Index VO Registry DAS and Registry Get Image and Spectral by ADQL
China-VO 2006, Guilin 11/29-12/03

3 VO Registry Registry: A repository of structured descriptions of resources Expressed as structured metadata Resource: Anything can be a Resource Unique Identifier China-VO 2006, Guilin 11/29-12/03

4 VO Registry The IVOA Registry allow astronomers to be able to locate, get details of, and make use of, any resource located anywhere in the IVO space, i.e. in any Virtual Observatory. The IVOA will define the protocols and standards whereby different registry services are able to interoperate and thereby realise this goal. China-VO 2006, Guilin 11/29-12/03

5 Searchable registry Publishing registry Full registry Local registry
VO Registry Searchable registry Publishing registry Full registry Local registry China-VO 2006, Guilin 11/29-12/03

6 VO Registry Searchable Registry : allows users and client applications to search for resource records using selection criteria against the metadata contained in the records. Publishing Registry : simply exposes its resource descriptions to the VO environment in a way that allows those descriptions to be harvested. China-VO 2006, Guilin 11/29-12/03

7 Local Registry: contains only a subset of known resources.
VO Registry Full registry: attempts to contain records of all resources known to the VO. Local Registry: contains only a subset of known resources. China-VO 2006, Guilin 11/29-12/03

8 Registry Framework Data Centers VO Projects Specialized
Full Searchable Registry VO Projects Local Publishing Registry Full Searchable Registry Data Centers Local Publishing Registry Local Searchable Registry Specialized Portals & Services China-VO 2006, Guilin 11/29-12/03

9 Registry Framework Data Centers VO Projects harvest Specialized
Full Searchable Registry VO Projects harvest (pull) Local Publishing Registry Full Searchable Registry Data Centers Local Publishing Registry Local Searchable Registry Specialized Portals & Services China-VO 2006, Guilin 11/29-12/03

10 Registry Framework Data Centers VO harvest Projects (pull) replicate
Full Searchable Registry VO Projects harvest (pull) replicate Local Publishing Registry Full Searchable Registry Data Centers Local Publishing Registry Local Searchable Registry Specialized Portals & Services China-VO 2006, Guilin 11/29-12/03

11 Registry Framework Data Centers VO harvest Projects replicate
Full Searchable Registry VO Projects harvest (pull) replicate Local Publishing Registry Full Searchable Registry Data Centers selective harvesting Local Publishing Registry Local Searchable Registry Specialized Portals & Services China-VO 2006, Guilin 11/29-12/03

12 Registry Framework Data Centers Client Applications VO Projects search
Full Searchable Registry VO Projects Local Publishing Registry Full Searchable Registry Data Centers Local Publishing Registry search queries Local Searchable Registry Client Applications Specialized Portals & Services China-VO 2006, Guilin 11/29-12/03

13 Registry Framework Data Centers Client Applications VO Projects search
Full Searchable Registry VO Projects Local Publishing Registry Full Searchable Registry Data Centers Local Publishing Registry search queries Local Searchable Registry Client Applications Specialized Portals & Services China-VO 2006, Guilin 11/29-12/03

14 VO Registry Resources and Services can be searched for based on their characteristics Query results returned in machine-interpretable form It should be possible to uniquely retrieve a description of a resource or service either via a unique ID or via a small and predictable set of metadata. China-VO 2006, Guilin 11/29-12/03

15 VO Registry Be easy for data/service provider to register a new service. Be easy or automatic to update the metadata associated with a resource or service. Be easy to unregister a resource and service The registry should expect that registered services may become temporarily unavailable. China-VO 2006, Guilin 11/29-12/03

16 Registering your Resource
First, just enter the description into registration form at one of the available registries: STScI/JHU Registry: NCSA Registration Portal: Caltech Carnivore: China-VO 2006, Guilin 11/29-12/03

17 Registering your Resource
Secondly, if you have a large number of resources to register, you can run your own registry on your own site: NCSA VORegistry-in-a-Box Caltech Carnivore: China-VO 2006, Guilin 11/29-12/03

18 Registry Interface Defining a standard query and harvesting interface.
This will allow the communication between registries to be a standard, and allow external implementations that need access to a registry a standard for querying the Registry. China-VO 2006, Guilin 11/29-12/03

19 VO Registry & China VO DAS
China-VO 2006, Guilin 11/29-12/03

20 Using Registry to get Data Resource
通过Registry获得Data Resource 信息： 查询Registry 解析查询结果 生成Metadata对象 填充DataResourceMap China-VO 2006, Guilin 11/29-12/03

21 VO Registry & China VO DAS
China-VO 2006, Guilin 11/29-12/03

22 VO Registry & China VO DAS
China-VO 2006, Guilin 11/29-12/03

23 VO Registry & China VO DAS
China-VO 2006, Guilin 11/29-12/03

24 VO Registry & China VO DAS
China-VO 2006, Guilin 11/29-12/03

25 VO Registry & China VO DAS
China-VO 2006, Guilin 11/29-12/03

26 VO Registry & China VO DAS
China-VO 2006, Guilin 11/29-12/03

27 VO Registry & China VO DAS
China-VO 2006, Guilin 11/29-12/03

28 VO Registry & China VO DAS
China-VO 2006, Guilin 11/29-12/03

29 Resource Metadata: XML Schema
<?xml version="1.0" encoding="utf-8"?> <ArrayOfDBResource xmlns:xsd=" xmlns:xsi=" xmlns=" <DBResource xsi:type="ServiceSkyNode"> <dbid>5963</dbid> <status>1</status> <Identifier>ivo://archive.stsci.edu/galex/SKYNODE</Identifier> <Title>Galaxy Evolution Explorer</Title> <ShortName>GALEX</ShortName> <CurationPublisherName>STScI</CurationPublisherName> <CurationCreatorName>Alberto Conti</CurationCreatorName> …………… <PrimaryTable>Photoprimary</PrimaryTable> <PrimaryKey>objid</PrimaryKey> </DBResource> China-VO 2006, Guilin 11/29-12/03

30 Resource Metadata: XML Schema
<?xml version="1.0" encoding="utf-8"?> <ArrayOfDBResource xmlns:xsd=" xmlns:xsi=" xmlns=" <DBResource xsi:type="ServiceSkyNode"> <dbid>5963</dbid> <status>1</status> <Identifier>ivo://archive.stsci.edu/galex/SKYNODE</Identifier> <Title>Galaxy Evolution Explorer</Title> <ShortName>GALEX</ShortName> <CurationPublisherName>STScI</CurationPublisherName> <CurationCreatorName>Alberto Conti</CurationCreatorName> …………… <PrimaryTable>Photoprimary</PrimaryTable> <PrimaryKey>objid</PrimaryKey> </DBResource> China-VO 2006, Guilin 11/29-12/03

31 VO Registry & VO Table <?xml version="1.0"?>
<VOTABLE version="1.1" xmlns:xsi=" xsi:noNamespaceSchemaLocation=" <COOSYS ID="J2000" equinox="J2000." epoch="J2000." system="eq_FK5"/> <RESOURCE name="BADCDAITEST"> <TABLE name="sdss"> <DESCRIPTION>Velocities and Distance estimations</DESCRIPTION> <FIELD name="ra" ID="col1" ucd="pos.eq.ra;meta.main" ref="J2000" datatype="float" width="6" precision="2" unit="deg"/> <FIELD name="decl" ID="col2" ucd="pos.eq.dec;meta.main" ref="J2000" datatype="float" width="6" precision="2" unit="deg"/> </TABLE> </RESOURCE> </VOTABLE> China-VO 2006, Guilin 11/29-12/03

32 Get Image by ADQL 用户提交ADQL查询语句 解析ADQL
如果涉及到Image查询，OGSA DAI中的activity查询虚拟的“图像数据库”。 查询的结果按照用户的需求放在指定的URL China-VO 2006, Guilin 11/29-12/03

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