Page History

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Time	Item	Who	Notes
	metaserv v1	all	Tatiana Goldina expressed concerns that the current meatserv V1 does not satisfy SUIT needs to get information to build the query search form. Prototype metaserv allows SUIT to get a list of databases, but it's not possible to tell which database has science data, which tables are catalogs, "image metadata", or "forced sources" (used in light curve queries). SUIT needs to know which columns contain object, filter, ra and dec (corners ra and dec for images). We can aim for using “ucd” attribute to identify some of this information, but “ucd” is not always available and several fields might have the same “ucd”, like “pos.eq.ra”. How do we tell which column contains ra for the center of the image and which columns are for the corners? Brian Van Klaveren is working on implementing VO RegTAP (IVOA Registry Relational Schema) to facilitate data discovery, using VOResource. For images, CAOM will be used to describe image metadata UCD will be used to describe column data, but it might not be sufficient. UType will be explored for LSST specific information, i.e. Question: which team is responsible to define UCD for each data item, pipeline team? Todo: for L3 data ingest into the database, requirement/guidelines for users to provide UCD, mapping the user data into the LSST type so LSP could provide better tool/service.
	future topics		sync SUIT expectation and DAX implementation plan

Use cases from SUIT:

SUIT needs to provide a capability for users to browse all the possible metadata so users can decide what they want to explore further.
SUIT needs to display different UI depending on what user is interested in: catalogs, images, time series data, anything else.
SUIT needs to overlay catalog sources and image footprints on a coverage image.
SUIT needs to be able to display light curves of an object in various bands.

The following information is needed to support this:

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Table name,
type (image metadata, catalog - source/forced source, EFD-related),
description,
possible link to the formal document about this table
when a table has object id, what is the name of multi-epoch table to get light curve queries for this object

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UID (to identify columns that hold ra and dec, filter band, object id, image corners)
UType (extra info like the 4 corners of an image, ...),
Column name,
description,
(?) short description to display in tooltips,
unit,
data type
relationship with columns in other table ( objectID in object table to objectID in source table)
unless this relationship can be determined using UCDs

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Please see page Metadata Service for more information.

Unknown User (xiuqin), Tatiana Goldina provide a use case in SUIT to for metaServ, with specific example if possible.
Brian Van Klaveren post the sites that implemented RegTAP for others to explore
Brian Van Klaveren research on the grouping of columns to express 4 corners of an image