Versions Compared

Old Version 203

changes.mady.by.user Stéphane Erard

Saved on

compared with

New Version Current

changes.mady.by.user Stéphane Erard

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.


Note: from 5 July 2021, these pages are no longer the primary source of the EPN-TAP doc - see instead the IVOA latex source: https://github.com/ivoa-std/EPNTAP


List of EPN-TAP parameters
(refreshed/completed April 2019, Oct 2020, June 2021, Oct 2021) (SE) 

You can use this file to keep track of your service parameters: EPN-TAP_parameters_List_template.xlsx

EPN-TAP

  • EPN-TAP is a VO access protocol dedicated to Planetary Science data. It is based on the TAP mechanism from IVOA, completed with sets of parameters and associated lists of values. In this regard, it is similar to ObsTAP but with a different scope.
  • EPN-TAP version 2 is a major update of the protocol to accommodate larger services and simplify setup and use of data services. All parameters are described here.

...

  • Lab spectroscopy: parameters to describe mineralogical samples (and possibly other samples)
  • Solar System objects: covers orbital/rotational parameters, physical properties, and taxonomy
  • APIS: contains for consistency with APIS service. Contains parameters for observing programs Contributive (most parameters are actually included in other extensions)
  • Contributive works / observing programs: enlargement of APIS extension to other data
  • Exoplanets / planetary systems properties
  • Map extension (to be enlarged)
  • Events: covers the VOevent standard and other types of events
  • Particle spectroscopy (to be finalized)
  • Results of planetary 3D modelling run (in progress)
  • Bibliographic entries? May be manageable otherwise, through bibcode / doi interpretation

Support file

...

Name, v2

...

You can use this file to keep track of your service parameters: 

...

EPN-TAP_parameters_List_template.xlsx


target_name LIKE '%toto%' OR target_name IS NULL

Syntax IS NULL stands for both strings and numerical parameters (the = operator is accepted in this context only by latest DaCHS servers)

...

• UCDs: the above table has been reviewed against the UCD documents, including latest discussions (4/2019). Review against PDS4 and IPDA to be performed.

2018 discussions / conclusions have been included here: https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList1dot42017June2018FebRFM

• min vs max: 

If only one value available, it must appear in both fields

• Optional parameters: they come in sets that are logically related; if one is present, the related ones must be present also (e.g., 3 access_* parameters)

• Granule_gid: any general indication to providers? I.e.: preview, native, calibrated, geometry… 
A client should be able to display the values present in a service, TBC (feasible in TOPCAT)

• Reshuffle previous "service parameters":

  • Mandatory :
    processing_level -mandatory
    service_title –mandatory
    publisher -mandatory???
    add publisher_did as in Obscore (for Dachs/registry)
  • Optional - TBC
    spatial_coordinate_description  (default = none)
    spatial_origin  (default = body center or SS barycenter? Or observer location)
    time_origin  (default = observer)
    time_scale (default = UTC – no other values allowed in data services? [only in computational services, e.g. ephemeris])
    Same values to be used in registry declaration 

...

;meta.datasetYYid;srcTargetName         distance;stat.min (bof)
or pos.radius;stat.min (does not exist)
  for spherical & cylindrical

pos.eq.ra;stat.min for celestial 

pos.bodyrc.lon;stat.min for body

pos.cartesian.x;stat.min for Cartesian

pos.healpix for healpix (with 2 parameters?  - weird) - TBC

empty ("") for none (and no unit)

pos.eq.dec 

phys.outline;obs.field

 pos.incidenceAng;stat.min
_meta.ref.url;meta.preview meta.ref;time.scale
Sub-observer point latitude

pos.ecliptic.lon;pos.heliocentric;stat.min 

pos.ecliptic.lon;pos.heliocentric;stat.max

DoublecountryImage observer's country of residence;obs.observermeta.pubcountry DoubleDouble

original_publisher

Min particle size in µmtype

Name

SQL type

Unit / Format / Range

Description

UCDPlease comment!
 

UCD in Obscore 1.1

(309/35/2016 2017 REC version)

Utype

(tentative) 

Comments

EPNCore mandatory parameters
 (Must be present, possibly empty)
 

 

 

 (bold face: a value is required)




Current value
current but dubious or undefined
check this (dubious)

— ? : closest sense

_ : N/A in ObsCore

from epntap v2 mixin (aug 2017)
equivalent/close in ObsCore doc 1.1

 

granule_uid

Y

Text

 


Internal table row index.
Unique ID Unique ID in data service.

meta.id 

meta.idmeta.id
 Can be alphanum.

granule_gid

Y

Text

 


Common to granules of same type

meta.id

meta.id
E.g. same map projection, or geometry data products. Can be alphanum.

obs_id

Text 


Associates granules derived from the same data

meta.id;obs

meta.idobscore:DataID.observationID E.g. various representations / processing levels. Can be alphanum., may be the ID of original observation.
Keep it simple in intricate situations.

dataproduct_type

Text 


Organization of the data product, from enumerated list

meta.code.class

meta.id

Epn.dataProductType

obscore:ObsDataset.dataProductType

 

targetmeasurement_nametype

Text

 


Standard IAU name of target (from a list related to target class), case sensitive.UCD(s) defining the data

meta.id;srcucd

meta.ucdEpn.Case sensitive
Services with no target_name do exist

target_class

Y

Text

 

Type of target, from enumerated list

src.class

src.classEpn.TargetClass 

time_min

 

Double

d (date as JD)Measurement_typeAdd ;meta.modelled if simulation or model
Add ;stat.uncalib if uncalibrated data - in which case processing_level must be 0 or 1

processing_level

Integer


Dataset-related encoding, or simplified CODMAC calibration level

meta.calibLevel

meta.code;obs.calib

~ obscore:ObsDataset.calibLevel To be replaced by PDS4 values in v2.1?

target_name

Text


Standard IAU name of target (must match target_class), case sensitive

meta.id;src

meta.id;srcEpn.TargetNameCase sensitive
Services with no target_name do exist

target_class

Text


Type of target, from enumerated list

src.class

src.classEpn.TargetClass

time_min

Double

d

Start time (in JD). UTC measured at time_origin location (default is observer's frame)

time.start;obs

time.start;obs.exposure

Char.TimeAxis.Coverage.Bounds.Limits.Interval.StartTime

TBD (from ObsCore)

 



time_max

Double

d (date as JD)

Stop time (in JD). UTC measured at time_origin location (default is observer's frame)

time.end;obs

time.end;obs.exposure

Char.TimeAxis.Coverage.Bounds.Limits.Interval.StopTime

TBD (from ObsCore)

 



time_sampling_time_sampling_step_min

Float

Double

s

Min time sampling step

time.resolution;stat.min

time.resolution — ?resolution Epn.Time.Time_sampling_step_min 

time_sampling_step_max

 

DoubleFloat

s

Max time sampling step

time.resolution;stat.max


Epn.Time.Time_sampling_step_max 

time_exp_min

 

DoubleFloat

s

Min integration time

time.duration;obs.exposure;stat.min

time.duration;obs.exposureEpn.Time.Time_exp_min

time_exp_max

Float

Double

s

Max integration time

time.duration;obs.exposure;stat.max


Epn.Time.Time_exp_max 

spectral_range_min

Float

Double

Hz

Min spectral range (as frequency)

em.freq;stat.min

em.wl;stat.minmin (always as wl)

Epn.Spectral.Spectral_range_minAlways as freqfrequency

spectral_range_max

 

DoubleFloat

Hz

Max spectral range (as frequency)

em.freq;stat.max

em.wl;stat.maxEpn.Spectral.Spectral_range_max 

spectral_sampling_step_min

 

DoubleFloat

Hz

Min spectral sampling step

em.freq;spect.stepbinSize;stat.min

meta.numberEpn.Spectral.Spectral_sampling_step_min 

spectral_sampling_step_max

 

DoubleFloat

Hz

Max spectral sampling step

em.freq;spect.stepbinSize;stat.max

meta.numberEpn.Spectral.Spectral_sampling_step_max 

spectral_resolution_min

Float

Double


Min spectral resolution (resolving power)

spect.resolution;stat.min

spect.resolution
resolution (relates to resolving power)

Epn.Spectral.Spectral_resolution_min

Now (2019) provides resolving power |(lambda / delta(lambda)| = |f /Df|
How do we accommodate FWHM for filters?

spectral_resolution_max

Float

Double


Max spectral resolution (resolving power)

spect.resolution;stat.max

 
Epn.Spectral.Spectral_resolution_max

Now (2019) provides resolving power |(lambda / delta(lambda)| = |f /Df|
How do we accommodate FWHM for filters?

c1min

 

DoubleFloat

(1)Longitude from 0. to 359.9999

RA from 0. to 23.9999


Min of first coordinatepos;stat.min, depends on the frame

see table below

pos.pos.eq.raeq.raEpn.Spatial.Spatial_range.c1min

Typo in current mixin (.lonG => .lon

UCDs for cyl and sph coord are from PEN-UCDlist-20210430

c1max

Float

(1)

Max of first coordinate, depends on the frame



Epn.Spatial.Spatial_range.c1minTypo in current mixin (.lonG => .lonc1max 

c2min

DoubleFloat

(1)

 


Max Min of first coordinate

pos;stat.max, etc

 

second coordinate, depends on the frame. 


pos.eq.decEpn.Spatial.Spatial_range.c1max c2min 

c2max

DoubleFloat

(1)

Latitude from -89.9999 to +89.9999

Min Max of second coordinate

pos;stat.min

pos.angDistance;stat.min
or pos.az.zd;stat.min (for zenithal distance) for spherical 

or pos.az.azi;stat.min (for azimuth)
  for cylindrical

pos.eq.dec;stat.min for celestial 

pos.bodyrc.lat;stat.min for body

pos.cartesian.y;stat.min for Cartesian

empty ("") for none (and no unit)

, depends on the frame



Epn.Spatial.Spatial_range.c2max

c3min

Float

(1)

Min of third coordinate



Epn.Spatial.Spatial_range.c3min

c3max

Float

(1)

Max of third coordinate



Epn.Spatial.Spatial_range.c2minc3max 

s_region

c2maxText

 

Double

(1)

Max of second coordinate

pos;stat.max, etc

 Epn.Spatial.Spatial_range.c2max 

c3min

 

Double

(1)

Min of third coordinate

pos;stat.min

pos.AngDistance;stat.min
or pos.az.azi;stat.min (for azimuth)
  for spherical

pos.distance;stat.min  for cylindrical

pos.distance;stat.min for celestial 

pos.bodyrc.alt;stat.min for body? (from surface only, implicitly from reference level)
or
pos.distance;pos.bodyrc;stat.min for body (from center)?

pos.cartesian.z;stat.min for Cartesian

empty ("") for none (and no unit)

 Epn.Spatial.Spatial_range.c3min 

c3max

 

Double

(1)

Max of third coordinate

pos;stat.max, etc

3)

ObsCore-like footprint in 2D (if spatial_frame_type = celestial or body)

pos.outline;obs.field

pos.outline;obs.fieldobscore:Char.SpatialAxis.Coverage.Support.Area

(was initially instr.fov, to be corrected)
ObsCore value updated (was phys.angArea;obs) to phys.outline, then corrected to pos.outline

Must have xtype= adql:REGION to work with TAP
Frame may be identified in q.rd (UNKNOWNFrame).
Use value given in spatial_frame_type - very unclear…
Do we need another param for GIS interface?

c1_resol_min

Float

(2)

Min resolution in first coordinate

(2)

pos.angResolution;stat.minEpn.Spatial.Spatial_range.c3max 

s_region

 

spoly

PgSphere spoly

ObsCore-like footprint for celestial, spherical, or body-fixed frames.

phys.outline;obs.fieldobscore:Char.SpatialAxis.Coverage.Support.Area

(was initially instr.fov, to be corrected)
ObsCore value updated (was phys.angArea;obs)
Frame may be identified in q.rd (UNKNOWNFrame).
Use value given in spatial_frame_type - very unclear…
Do we need another param for GIS interface?

c1_resol_min

 

Double

(1)

Min resolution in first coordinate

pos.resolution;stat.min
if linear 

pos.angResolution;stat.min
if angular

pos.angResolution;stat.minresolution.c1_resol_minpos.resolution restored in 2018
In body fixed frame, use pixelscale_min/max for resolution at the surface 

c1_resol_max

Float

(2)

Max resolution in first coordinate

(2)

pos.angResolution;stat.maxEpn.Spatial.Spatial_resolution.c1_resol_max_

c2_resol_min

Float

(2)

Min resolution in second coordinate

(2)


Epn.Spatial.Spatial_resolution.c2_resol_min_

c2_resol_max

Float

(2)

Max resolution in second coordinate

(2)


Epn.Spatial.Spatial_resolution.c2_resol_max_

c3_resol_min

Float

(2)

Min resolution in third coordinate

(2)


Epn.Spatial.Spatial_resolution.c1c3_resol_minpos.resolution restored in 2018In body fixed frame, use pixelscale_min/max for resolution at the surface 

c1c3_resol_max

 

DoubleFloat

(12)

Max resolution in first third coordinate

pos.resolution;stat.max
if linear 

pos.angResolution;stat.max
if angular

pos.angResolution;stat.maxEpn.Spatial.Spatial_resolution.c1_resol_max_

c2_resol_min

 

Double

(2)


Epn.Spatial.Spatial_resolution.c3_resol_maxpos.resolution restored in 2018

spatial_frame_type

Text

(1)

Min resolution in second coordinate

pos.resolution;stat.min
if linear 

pos.angResolution;stat.min
if angular

 Epn.Spatial.Spatial_resolution.c2_resol_min_

c2_resol_max

 

Double

(1)

Max resolution in second coordinate

pos.resolution;stat.max
if linear 

pos.angResolution;stat.max
if angular

 Epn.Spatial.Spatial_resolution.c2_resol_max_

c3_resol_min

 

Double

(1)

Min resolution in third coordinate

pos.resolution;stat.min
if linear 
pos.angResolution;stat.min
if angular (spherical only)

 Epn.Spatial.Spatial_resolution.c3_resol_minpos.resolution restored in 2018

c3_resol_max

 

Double

(1)

Max resolution in third coordinate

pos.resolution;stat.max
if linear 
 pos.angResolution;stat.min
if angular (spherical only) 

 Epn.Spatial.Spatial_resolution.c3_resol_maxpos.resolution restored in 2018


spatial_frame_type

 Y

Text

(1)

Use "none" if undefined

Flavor of coordinate system, defines the nature of coordinates. From enumerated list

meta.code.class;pos.frame

_

A value is required by DaCHS (query will return errors if empty)
Default value = none

incidence_min

 

Double

deg

Min incidence angle (solar zenithal angle)

Flavor of coordinate system, defines the nature of coordinates. From enumerated list. Use "none" if undefined

meta.code.class;pos.frame

_

A value is required by DaCHS (query will return errors if empty)
Default value = none

incidence_min

Float

deg

Min incidence angle (solar zenithal angle)

 pos.incidenceAng;stat.min

_Epn.View_angle.Incidence_angle_minUCD for angles included in 2018 

incidence_max

Float

deg

Max incidence angle (solar zenithal angle)

 pos.incidenceAng;stat.max

_Epn.View_angle.Incidence_angle_maxUCD for angles included in 2018

emergence_min

Float

deg

Min emergence angle

 pos.emergenceAng;stat.min

_Epn.View_angle.Emergence_angle_minUCD for angles included in 2018

emergence_max

Float

deg

Max emergence angle

 pos.emergenceAng;stat.max

_Epn.View_angle.Emergence_angle_maxUCD for angles included in 2018

phase_min

Float

deg

Min phase angle

pos.phaseAng;stat.min


Epn.View_angle.Phase_angle_min

phase_max

Float

deg

Max phase angle

pos.phaseAng;stat.max


Epn.View_angle.IncidencePhase_angle_minUCD for angles included in 2018 

incidence_max

 

Double

deg

Max incidence angle (solar zenithal angle)

 pos.incidenceAng;stat.max

_Epn.View_angle.Incidence_angle_maxUCD for angles included in 2018

emergence_min

 

Double

deg

Min emergence angle

 pos.emergenceAng;stat.min

_Epn.View_angle.Emergence_angle_minUCD for angles included in 2018

emergence_max

 

Double

deg

Max emergence angle

 pos.emergenceAng;stat.max

_Epn.View_angle.Emergence_angle_maxUCD for angles included in 2018

phase_min

 

Double

deg

Min phase angle

pos.phaseAng;stat.min

 Epn.View_angle.Phase_angle_min

phase_max

 

Double

deg

Max phase angle

pos.phaseAng;stat.max

 Epn.View_angle.Phase_angle_max 

instrument_host_name

 

Text

 

Standard name of the observatory or spacecraft

meta.id;instr.obsty

meta.id;instr.telProvenance.ObsConfig.Facility.name 

instrument_name

 

Text

 

Standard name of instrument

meta.id;instr

meta.id;instrProvenance.ObsConfig.Instrument.name 

measurement_type

 

Text

 

UCD(s) defining the data

meta.ucd

meta.ucdEpn.Measurement_type Add ;meta.modelled if simulation or model
Add ;stat.uncalib if uncalibrated data 

processing_level

 

Integer

 

Use dataset-related value. If none defined, use simplified CODMAC calibration level

meta.calibLevel

meta.code;obs.calib

~ obscore:ObsDataset.calibLevelTo be replaced by PDS4 values in v2.1?

creation_date

YTimestamp

(ISO-8601 String)

Date of first entry of this granule

time.creation

time;meta.dataset 

modification_date

YTimestamp(ISO-8601 String)

Date of last modification

time.processing

 

Used to handle mirroring
Value being discussed in 2018

release_date

YTimestamp

(ISO-8601 String)

Start of public access period (set to creation_date if no proprietary period)

time.release

time.releaseobscore:Curation.releaseDate 

service_title

Y

Text

 

Title of resource = schema name

meta.title

 May be used to handle multiservice results

Common optional parameters

 

 

 

 

 

  

access_url

 

Text

 

URL of the data file, case sensitive (additional files may be linked through datalink_url). Can point to a script. If present, next 2 parameters must also be present.

meta.ref.url;meta.file

meta.ref.urlObs.Access.Reference

Use this to link data!
Could accommodate a datalink with access_format = 'application/x-votable+xml;content=datalink'
(from ObsCore)
- but this is a funny idea…

access_format

 

Text

(mime type in lowercase)

File format type  

meta.code.mime

meta.code.mimeObs.Access.Format 

access_estsize

 

Integer

kbyte

Estimate file size in kbyte (with this spelling)

phys.size;meta.file

phys.size;meta.fileObs.Access.Size 
access_md5 Text MD5 Hash for the file when available (real file, not script) meta.checksum;meta.file  

thumbnail_url

 

Text

 

URL of a thumbnail image with predefined size (png ~200 pix, for use in a client only)

  

file_name

 

Text

 

Name of the data file only, case sensitive

meta.id;meta.file

meta.title;obs — ?ObsCore obs_title is for a short free text string describing the granule. Do we want this?datalink_urlText(url)Provides links to files or services on the servermeta.ref.url;meta.datalinkAssociated mime-type is 'application/x-votable+xml;content=datalink'
(from ObsCore)

species

 

Text

 

Identifies a chemical species, case sensitive

meta.id;phys.atmol

 This is the only case sensitive parameter (with target_name)wavebandText

Electro-magnetic band, from enumerated list

instr.bandpassalt_target_name Textcan be a hash listProvides alternative target name if more commonmeta.id;src  

target_region

 

Text

 

Type of region or feature of interest

obs.field

  

feature_name

 

Text

 

Secondary name
(e.g. standard name of a region of interest)

obs.field 

 
Anchor
featurenamefeaturename

publisher

 

Text

 

Resource publisher

meta.curation

meta.ref.url;meta.curation~ obscore:Curation.publisherID 

bib_reference

 

Text

 

Bibcode preferred if available, doi, or other biblio id, URL...

meta.bib

meta.bib.bibcode (if bibcode)

meta.bib.bibcode

(always as bibcode)

obscore:Curation.reference 
internal_reference Text List of granule_uid(s) in the current servicemeta.id.cross Use to link one granule to a set of other granules. To be used only if required - e.g. to solve situations that would otherwise require several tablesexternal_link Text(url)Link to a web page providing more details on the granule.meta.ref.url 

Link to an individual page in a web site associated to the database, e.g., a planet page in Exoplanets service. This is a way to provide extra granule information which cannot be accommodated in the table.

spatial_coordinate_description

 

Text

 

ID of specific coordinate system and version / properties

meta.code.class;pos.frame

 

~COOSYS, but includes planetary ones
Still TBD. Discussion in progress here: EPN-TAP v2: Current discussion topic

spatial_origin

 

Text

 

Defines the frame origin

meta.ref;pos.frame

  

time_origin

 

Text

 

Defines where the time is measured (e. g., ground vs spacecraft)

 target_time is of course always on target.

time_scale

 

Text

 

Always UTC in data services - from enumerated list

time.scale

  subsolar_longitude DoubledegSub-solar point longitudepos.bodyrc.lon;stat.min Provided in the most natural body-related coordinate frame, E-handed - seems to require 'body'
No min/max here 		subsolar_latitude DoubledegSub-solar point latitudepos.bodyrc.lat;stat.min _subobserver_longitude DoubledegSub-observer point longitude (sub-Earth for ground based observations)pos.bodyrc.lon;stat.min _subobserver_latitude Doubledegmax

instrument_host_name

Text


Standard name of the observatory or spacecraft

meta.id;instr.obsty

meta.id;instr.telProvenance.ObsConfig.Facility.name

instrument_name

Text


Standard name of instrument

meta.id;instr

meta.id;instrProvenance.ObsConfig.Instrument.name

service_title

Text


Title of resource = schema name

meta.title



May be used to handle multiservice results

creation_date

Timestamp

(4)

Date of first entry of this granule

time.creation

time;meta.dataset

modification_date

Timestamp(4)

Date of last modification

time.processing



Used to handle mirroring
UCD value being discussed in 2018

release_date

Timestamp

(4)

Start of public access period (set to creation_date if no proprietary period)

time.release

time.releaseobscore:Curation.releaseDate

The value is in ISO 8601 format reusing this pattern: (“YYYY-MM-DDThh:mm:ss”) If release_date is in the future, the data is proprietary.

Common optional parameters








access_url

Text


URL of the data file, case sensitive (additional files may be linked through datalink_url). Can point to a script. If present, next 2 parameters must also be present

meta.ref.url;meta.file

meta.ref.urlObs.Access.Reference

Use this to link data!
Could accommodate a datalink with access_format = 'application/x-votable+xml;content=datalink'
(from ObsCore)
- but this is a funny idea…

access_format

Text


RFC 2045 media type (mime), required to be all-lower case 

meta.code.mime

meta.code.mimeObs.Access.Format

access_estsize

Integer

kbyte

Estimate file size in kbyte (with this spelling)

phys.size;meta.file

phys.size;meta.fileObs.Access.Size
access_md5Text
MD5 Hash for the file when available (real file, not script) meta.checksum;meta.file


thumbnail_url

Text


URL of a thumbnail image with predefined size (png ~200 pix, for use in a client only)

meta.ref.url;meta.preview




file_name

Text


Name of the data file only, case sensitive

meta.id;meta.file

meta.title;obs — ?
ObsCore obs_title is for a short free text string describing the granule. Do we want this?
datalink_urlText
Provides links to files or services on the servermeta.ref.url

Associated mime-type is 'application/x-votable+xml;content=datalink'
(from ObsCore)

bib_reference

Text


Bibcode or doi preferred; can be a URL or anything else. Refers to the granule

meta.bib

meta.bib

obscore:Curation.referenceBibcode & doi can be completed in TOPCAT

publisher

Text


Resource publisher

meta.curation

meta.ref.uri;meta.curation~ obscore:Curation.publisherID

processing_level_desc

Text
Describes specificities of the processing levelmeta.note


internal_referenceText
Related granule_uid(s) in the current servicemeta.id.cross

Use to link one granule to a set of other granules. To be used only if required - e.g. to solve situations that would otherwise require several tables
external_linkText
Web page providing more details on the granulemeta.ref.url

Link to an individual page in a web site associated to the database, e.g., a planet page in Exoplanets service. This is a way to provide extra granule information which cannot be accommodated in the table.

species

Text


Identifies a chemical species, case sensitive

meta.id;phys.atmol



This is the only case sensitive parameter (with target_name)
messengerText

Vector of measured signal, including electromagnetic 
band, from enumerated list

instr.bandpass


filterText Identifies filter in use, typically for imagesmeta.id;instr.filter

Informative only, free format (no list, but see http://svo2.cab.inta-csic.es/svo/theory/fps3/). Search can only rely on spectral range, as ObsCore does.
alt_target_nameText
Provides alternative target name(s). Can be a hash listmeta.id;src


feature_name

Text


Secondary name (e.g. standard name of a region of interest)

meta.id;src;obs.field 



Anchor
featurename
featurename

target_region

Text


Type of region or feature of interest

meta.id;src;obs.field




shapeText

introduces an ascii (ST)MOC, v2 (2D footprint on celestial, spherical, or body-related frames, possibly including time)

pos.outline;obs.field

Must have xtype="MOC" (follow DALI recommendation)

outline doesn't fit definition (refers to a contour)

spatial_coordinate_description

Text


ID of specific coordinate system and version / properties

meta.code.class;pos.frame



~COOSYS, but includes planetary ones
Still TBD, needs to be OGC compliant. Discussion in progress here: EPN-TAP v2: Current discussion topic

spatial_origin

Text


Defines the frame origin

meta.ref;pos.frame




time_refposition

Text


Defines where the time is measured (e. g., ground vs spacecraft). Default is observer's frame

meta.ref;time.scale



target_time is of course always on target.

time_scale

Text


Defaults to UTC in data services - from enumerated list

time.scale




solar_longitude_min

Float

deg

Min Solar longitude Ls (location on orbit / season)

pos.ecliptic.lon;pos.heliocentric;stat.min 




solar_longitude_max

Float

deg

Max Solar longitude Ls (location on orbit / season)

pos.ecliptic.lon;pos.heliocentric;stat.max




local_time_min

Float

h

Min local time at observed region

time.phase;time.period.rotation;stat.min




local_time_max

Float

h

Max local time at observed region

time.phase;time.period.rotation;stat.max 




target_distance_min

Float

km

Min observer-target distance

pos.distance;stat.min




target_distance_max

Float

kmMax observer-target distancepos.distance;stat.max


target_time_min

Timestamp

(4)

Min observing time in target frame

time.start;src



(simplest way to look for coordinated observations)

target_time_max

Timestamp

(4)

Max observing time in target frame

time.end;src




earth_distance_minFloatAUMin Earth-target distancepos.distance;stat.min


earth_distance_maxFloatAUMax Earth-target distance

pos.distance;stat.max




sun_distance_minFloatAUMin Sun-target distancepos.distance;stat.min


sun_distance_maxFloatAUMax Sun-target distancepos.distance;stat.max


subobserver_longitude_minFloatdegMinimum sub-observer point longitude (sub-Earth for ground based observations) pospos.bodyrc.latlon;stat.min

 _
subobserver_longitude_max

ra

 DoubleFloatdeg only (like ObsCore)
Right ascension (not hour angle!		Maximum sub-observer point longitude (sub-Earth for ground based observations)pos.eqbodyrc.ralon;metastat.mainmax  

dec

 

Double

deg

Declination

pos.eq.dec;meta.main

  radial_distance_min DoublekmMin distance from center (in body-fixed frame)pos.distance;pos.bodyrc;stat.min  radial_distance_max DoublekmMax distance from center (in body-fixed frame)pos.distance;pos.bodyrc;stat.max  altitude_fromshape_min DoublekmMin altitude above shape model / DTM (in body-fixed frame)pos.bodyrc.alt;stat.min  altitude_fromshape_max DoublekmMax altitude above shape model / DTM (in body-fixed frame)pos.bodyrc.alt;stat.max  

solar_longitude_min

 

Double

deg

Min Solar longitude Ls (location on orbit / season)

  

solar_longitude_max

 

Double

deg

Max Solar longitude Ls (location on orbit / season)

  

local_time_min

 

Double

h

Min local time at observed region

time.period.rotation;time.phase;stat.min

  

local_time_max

 

Double

h

Max local time at observed region

time.period.rotation;time.phase;stat.max

  

target_distance_min

 

Double

km

Min observer-target distance

pos.distance;stat.min

 target_distance_max 

Double

kmMax observer-target distancepos.distance;stat.max  

target_time_min

 

Double

d

Min observing time in target frame

time.start

 (simplest way to look for coordinated observations)

target_time_max

 

Double

d

Max observing time in target frame

time.end

  earth_distance_min DoubleauMin Earth-target distancepos.distance;stat.min  earth_distance_max DoubleauMax Earth-target distance

pos.distance;stat.max

  sun_distance_min DoubleauMin Sun-target distancepos.distance;stat.min  sun_distance_max DoubleauMax Sun-target distancepos.distance;stat.max  

Parameters from extensions

obs_modeTextObserving modemeta.code;instr.setupdetector_nameTextDetector namemeta.id;instr.detFrom APIS + observation extensions (UCDs adapted later)opt_elemTextOptical element namemeta.id;instr.paramfilter Text Identifies filter in use, typically for images.meta.id;instr.filter Informative only, free format (no list, but see http://svo2.cab.inta-csic.es/svo/theory/fps3/). Search can only rely on spectral range, as ObsCore does.

instrument_typeTexttype of instrumentmeta.id;instrTo be used with caution: free format, no reference list intended.acquisition_idTextID of the data file/acquisition in the original archivemeta.idproposal_idIntegerProposal identifiermeta.id;obs.proposalproposal_pitextProposal principal investigator

meta.id.PI;obs.proposal

proposal_titleTextProposal titlemeta.title;obs.proposalcampaignTextName of the observational campaignmeta.id;meta.codetarget_descriptionTextOriginal target keywordsmeta.note;srcproposal_target_nameTexttarget name as in proposal titlemeta.note;obs.proposaltarget_apparent_radiusDoubleApparent radius of the target

phys.angSize;src

north_pole_positionDoubleNorth pole position angle with respect to celestial north polepos.angDistancetarget_primary_hemisphereTextPrimary observed hemispheremeta.id;obs.fieldtarget_secondary_hemisphereTextSecondary observed hemispheremeta.id;obs.fieldplatescDoublespatial resolution per pixel or platescale (on sky only)pos.angResolutionorientation_
subobserver_latitude_minFloatdegMinimum sub-observer point latitude (sub-Earth for ground based observations) pos.bodyrc.lat;stat.min

_
subobserver_latitude_maxFloatdegMaximum sub-observer point latitude (sub-Earth for ground based observations) pos.bodyrc.lat;stat.max

_
subsolar_longitude_minFloatdegMinimum sub-solar point longitudepos.bodyrc.lon;stat.min

Provided in the most natural body-related coordinate frame, E-handed - seems to require 'body'
subsolar_longitude_maxFloatdegMaximum sub-solar point longitudepos.bodyrc.lon;stat.max

Provided in the most natural body-related coordinate frame, E-handed - seems to require 'body'
subsolar_latitude_minFloatdegMinimum sub-solar point latitudepos.bodyrc.lat;stat.min

_
subsolar_latitude_maxFloatdegMaximum sub-solar point latitudepos.bodyrc.lat;stat.max

_

ra

Float

deg

Right ascension

pos.eq.ra;meta.main



deg only (like ObsCore)

dec

Float

deg

Declination

pos.eq.dec;meta.main




radial_distance_minFloatkmMin distance from observed area to body center pos.distance;pos.bodyrc;stat.min


radial_distance_maxFloatkmMax distance from observed area to body center pos.distance;pos.bodyrc;stat.max


altitude_fromshape_minFloatkmMin altitude of observed area above shape model / DTMpos.bodyrc.alt;stat.min


altitude_fromshape_maxFloatkmMax altitude of observed area above shape model / DTMpos.bodyrc.alt;stat.max


Parameters from extensions








APIS extension






obs_modeText
Observing modemeta.code;instr.setup

From APIS + observation extensions (with adapted UCDs)
detector_nameText
Detector namemeta.id;instr.det


opt_elemText
Optical element namemeta.id;instr.param


instrument_typeText
Type of instrumentmeta.id;instr

Informative only (not a reliable search parameter): free format, no reference list intended.
acquisition_idText
ID of the data file/acquisition in the original archivemeta.id


proposal_idText
Proposal identifiermeta.id;obs.proposal


proposal_piText
Proposal principal investigator

meta.id.PI;obs.proposal




proposal_titleText
Proposal titlemeta.title;obs.proposal


campaignText
Name of the observational campaignmeta.id;obs.proposal


target_descriptionText
Original target keywordsmeta.note;src


proposal_target_nameText
Target name as in proposal titlemeta.note;obs.proposal


target_apparent_radiusFloatarcsecApparent radius of the target

phys.angSize;src




north_pole_positionFloatdegNorth pole (of target) position angle with respect to celestial north pole

pos.posAng



Group of 5 parameters very specific to APIS.
Name is ~ OK, but actually provides the position angle of the planet axis. Use "orientation" for the image.
target_primary_hemisphereText
Primary observed hemispheremeta.id;obs.field


target_secondary_hemisphereText
Secondary observed hemispheremeta.id;obs.field


platescFloatarcsec/pixPixel angular size or platescale (on sky only)instr.scale


orientationFloatdegPosition angle of image y axis (on sky only), direct sense from north directionpos.posAngobserver_nameTextObserver name

obs.observer;meta.main



observer_instituteProvides the direction of the polar axis in the image, counted clockwise from north.
measurement_unitText
Physical unit, same as Bunit in fitsmeta.unit


Contributive work extension






observer_nameText
Observer institutename

meta.

note

id.PI;

meta

obs.

main

observer




observer_idInteger
Image observerObserver's PVOL numeric identifier

meta.id.PI




Group of 5 from PVOL, UCDs are wrong
this was OK for general use but UCDs have to be changed in PVOL.
meta.pubidin PVOL

observer_codeText
Image observerObserver's PVOL service usernamemeta.id.PI

meta.pubcode in PVOL
observer_instituteText
Observer institutemeta.note


observer_countryText
Observer's country of residencemeta.note;obs.observer

meta.pubcountry in PVOL
observer_locationText
Broad location of the observer or telescope. Can be used when the exact location cannot be releasedpos;obs.observer - not in mixin!

meta.pubcountry in PVOL
observer_lonFloatDoubledegObserver's approximate longitudeobs.observer;pos.earth.lon


meta.publon in PVOL
observer_latFloatDoubledegObserver's approximate latitudeobs.observer;pos.earth.lat

meta.publat in PVOLmass

original_publisher

 Doublekg Mass of objectphys.mass Solar System Objects extension (generic values in catalogues, not observations)


sideral_rotation_period Doubleh Object rotation ratetime.period.rotation Text
Refers to the source of the data, e.g.,  in compilations of observations or experimental datameta.note

Experimental spectroscopy + contributive work extensions

Solar System objects extension






mean_radius FloatDoublekm 
phys.size.radius  


equatorial_radius DoubleFloatkm 
phys.size.radius  


polar_radius DoubleFloatkm 
phys.size.radius  


diameterdoubleFloatkmTarget diameter, or equivalent diameter for binary objectsphys.size.diameter

Used in tnosarecool, not very consistent (use radius?)
massFloatkgMass of objectphys.mass

Solar System Objects extension (generic values in catalogues, not observations)
sidereal_rotation_periodFloathObject rotation ratetime.period.rotation


semi_major_axis

DoubleFloatauAU

phys.size.smajAxis




inclinationFloatDoubledegOrbit inclination

src.orbital.inclination




eccentricityDoubleFloat
Orbit eccentricity

src.orbital.eccentricity




long_ascDoubleFloatdegLongitude of ascending node, J2000.0src.orbital.node


arg_perihelDoubleFloatdegArgument of Perihelionperihelion, J2000.0src.orbital.periastron


mean_anomalyDoubleFloatdegMean anomaly at the epochsrc.orbital.meanAnomaly

dynamical_class

TextClass of small body, from enumerated listmeta.code.classdynamical_typeTextSubdivision of the class, from enumerated listmeta.code.classtaxonomy_codeTextCode for target taxonomysrc.class.colorValues depend on target type and possibly service


magnitudeDoubleepochDoubled

Epoch of interest in JD

time.epoch


magnitudeFloatmagAbsolute magnitude. For small bodies, from HG magnitude systemphys.magAbs

Actually depends on service (eg, spectro_planets vs DynAstVO vs tnosarecool).
UCD may include mention of the photometric band.
fluxFloatmJyTarget fluxphot.flux.density


albedoFloat
Target albedophys.albedo


mapdynamical_projectionclass

Text
ID Class of small body, from enumerated listpos.projectionMap extension

map_height

Doublepixelmeta.code.class;src


dynamical_typeText
Subdivision of the class, from enumerated listmeta.code.class;src


taxonomy_codeText
Code for target taxonomysrc.class.color

Possible values depend on target type and possibly on service
Map extension






map_projection

Text
ID from enumerated list, or string with parameters (referring to a standard)pos.projection

Map extension

map_height

FloatpixMap size in px

phys.size




map_widthDoubleFloatpixelpixMap size in px

phys.size




map_scaleTextFormat TBD
Preferably a ratio (e. g., "1:50000")

pos.wcs.scale?




pixelscale_minDoubleFloatkm/pixelpixMin pixel size on a surface

instr.scale;stat.min




pixelscale_maxDoubleFloatkm/pixelpixMax pixel size on a surface

instr.scale;stat.max




Particle spectroscopy extension








particle_spectral_type

 

Text 


From enumerated list

 

meta.id;phys.particle

 Particle spectroscopy extension


particle_spectral_range_min

 

Double

 

 Float



phys.energy;phys.particle;stat.min

 

phys.mass;phys.particle;stat.min

 





particle_spectral_range_max

 

Double

 

 

Float



phys.energy;phys.particle;stat.max

phys.mass;phys.particle;stat.max

 


 


particle_spectral_sampling_step_min

 

Double

 

 Float



spect.resolution;phys.particle;stat.min

  




particle_spectral_sampling_step_max

 

Double

 

 

Float



spect.resolution;phys.particle;stat.max

  


particle_spectral_resolution_min

 

Double

 

 

spectFloat



 

spect.resolution;phys.particle;stat.min

 






particle_spectral_resolution_max

 

Double

 

 

Float



spect.resolution;phys.particle;stat.max

  





TextRefers to the source of the data, especially in compilations of experimental datameta.note;meta.main

Experiment spectroscopy + contributive work extensionsExperimental spectroscopy extension








producer_name

Text
Data producer name, especially in compilations of experimental datameta.note;meta.main


producer_institute

Text
Data producer institute, especially e. g., in compilations of experimental datameta.note;meta.main


sample_classificationidTexthash list
Information related to Provides a local ID in an existing catalogue meta.id;src

In addition to target_name

sample_classification

Text
Information related to class, sub-class, species… (using standard names)species… as hash listmeta.note;phys.composition

This uses standard names for classes… 
sample_descTextcan be a hash list
Describes the sample, its origin, and possible preparation. Can be a hash listmeta.note


dataspecies_calibration_descinchikeyText
can

Fixed length string identifying the species. Can be a hash list

Provides information on post-processing

meta.id;phys.

note

atmol

(preferably to a "comment" parameter)setup_descTextcan be a hash listDescribes the experimental setup if needed - may include Aperture (size of sample measured), etcmeta.note

geometry_type

TextType of observation (such as bidirectional, biconical, directional-hemispherical, etc)meta.note

grain_size_min

Doubleµm

Follows IUPAC standard (Heller et al 2015)

grain_size_min

FloatumMin sample particle size 

phys.size;stat.min




grain_size_maxFloatDoubleumMax sample particle size in µmsize 

phys.size;stat.max




azimuth_minDoubleFloatdegMin azimuth angle for illuminationpos.azimuth;stat.min

Check meaning/requirements for <0 values?
UCD added in 2018 (instead of pos.azimuthAng requested - OK)

azimuth_maxDoubleFloatdegMax azimuth angle for illuminationpos.azimuth;stat.max

UCD added in 2018

pressure

DoubleFloatbarAmbient pressure

phys.pressure



VOunits says: Pascal.
But this is in files 

measurement_atmosphere

text

measurement_atmosphere

Text
Describes experimental conditions. "vacuum" for measurements under vacuum.

meta.note;phys.pressure




temperatureDoubleFloatKAmbient temperature

phys.temperatureevent




setup_descText

Type of event from enumerated list (e. g., meteor_shower, fireball, lunar_flash, comet_tail_crossing…)

TBD

Events extension
If dataproduct_type = ev
UCDs should be provided with the standard

event_statusText

From enumerated list

TBDevent_citeText

From enumerated list

TBD

 

(1): depending on context (as given by spatial_frame_type). Please comment here: EPN-TAP v2: Current discussion topic

Beware that datatypes apply to the epn_core view, not to the q.rd file where they can be different

...

File name-type

...

granule_uid

...

granule_gid

...

obs_id

...

A-Raw

...

1

...

native

...

A

...

A-Calib

...

2

...

calibrated

...

A

...

A-geom

...

3

...

geometry

...

A

...

A-proj

...

4

...

projected

...

A

...

B-Raw

...

5

...

native

...

B

...

B-Calib

...

6

...

calibrated

...

B

...

B-geom

...

7

...

geometry

...

B

...

B-proj

...

8

...

projected

...

B 

Syntax

...

This can be parsed by ADQL/RegTAP function ivo_hashlist_has like this:
  select * from vvex.epn_core where 1 = ivo_hashlist_has(lower(target_name),'Venus')

Where the lower function is mandatory to handle values possibly containing upper cases (this is implicit on the 2nd argument)

Beware that only complete elements between separators will be found. The provider has to split the string according to expected searches, e.g.:
    Composite Infrared Spectrometer#CIRS
not    Composite Infrared Spectrometer (CIRS)

Parameters supporting multivalued lists include:
dataproduct_type (only when present in the same file; best avoided when possible)
target_name (but only one can be described in the granule)
alt_target_name
target_class
instrument_host_name
instrument_name (e.g. acronym and full name)
measurement_type
bib_reference
processing_level (when present in the same file)

...


Describes the experimental setup. Can be a hash listmeta.note

May include Aperture (size of sample measured), etc

data_calibration_desc

Text
Provides information on post-processing. Can be a hash listmeta.note

(preferably to a "comment" parameter)

geometry_type

Text
Type of observation, from enumerated list. Can be a hash listmeta.note;instr.setup


spectrum_type

Text
Type of spectral observation, from enumerated list TBD. Can be a hash listmeta.note;instr.setup

Alternative to UCD, very detailed

Event extension








event_type

Text

Type of event from enumerated list

meta.code.class



Events extension
If dataproduct_type = ev
UCDs should be provided with the standard

event_statusText

From enumerated list

meta.code.status




event_citeText

From enumerated list

meta.code.status





(1): depending on context (as given by spatial_frame_type), see table below

Longitude and RA range from 0. to 360; Latitude and Dec range from -90. to +90.

For spatial_frame_type = "none": no value is provided, UCD are empty strings (""), and no unit is provided

(2) Spatial resolution parameters have the same unit as spatial coordinate parameters. The associated UCD combine either pos.resolution (if linear) or pos.angResolution (if angular) with secondary stat.min or stat.max

c1: only body and celestial are angular; c2: only cartesian is linear; c3: only spherical is angular

(3): Any contour type that works with ADQL's geometry operators (CONTAINS, INTERSECTS...) is legal here

(4): Timestamps are provided as ISO-8601 String as specified by DALI. On VOtable output, xtype="timestamp" attribute is required.


Frame coordinates UCD/unitscelestialbodycartesiansphericalcylindrical

c1min

pos.eq.ra;stat.min 

pos.bodyrc.lon;stat.min

pos.cartesian.x;stat.min

(in km)

pos.spherical.r;stat.min 

(in m)

pos.cylindrical.r;stat.min 

(in km)

c1maxpos.eq.ra;stat.maxpos.bodyrc.lon;stat.max

pos.cartesian.x;stat.max

(in km)

pos.spherical.r;stat.max 

(in m)

pos.cylindrical.r;stat.max 

(in km)

c2minpos.eq.dec;stat.minpos.bodyrc.lat;stat.min

pos.cartesian.y;stat.min

(in km)

pos.spherical.colat;stat.min

pos.cylindrical.azi;stat.min

c2maxpos.eq.dec;stat.maxpos.bodyrc.lat;stat.max

pos.cartesian.y;stat.max

(in km)

pos.spherical.colat;stat.max

pos.cylindrical.azi;stat.max

c3min

pos.distance;stat.min

(in AU)

pos.bodyrc.alt;stat.min (from surface only, implicitly from reference level)
or
pos.distance;pos.bodyrc;stat.min (from center)?

(in km)

pos.cartesian.z;stat.min

(in km)

pos.spherical.azi;stat.min

pos.cylindrical.z;stat.min

(height, in km)

c3max

pos.distance;stat.max

(in AU)

pos.bodyrc.alt;stat.max (from surface only, implicitly from reference level)
or
pos.distance;pos.bodyrc;stat.max (from center)?

(in km)

pos.cartesian.z;stat.max

(in km)

pos.spherical.azi;stat.max

pos.cylindrical.z;stat.max

(height, in km)

Example table for IDs:

File name-type

granule_uid

granule_gid

obs_id

A-Raw

1

native

A

A-Calib

2

calibrated

A

A-geom

3

geometry

A

A-proj

4

projected

A

B-Raw

5

native

B

B-Calib

6

calibrated

B

B-geom

7

geometry

B

B-proj

8

projected

B 


Syntax


• multivalued lists = first entry#second entry#…#last entry, or scalar (with no #)
Values separator = #
No quotes around the list

This can be parsed by ADQL/RegTAP function ivo_hashlist_has like this:
  select * from vvex.epn_core where 1 = ivo_hashlist_has(lower(target_name),'Venus')

Where the lower function is mandatory to handle values possibly containing upper cases (this is implicit on the 2nd argument)

Beware that only complete elements between separators will be found. The provider has to split the string according to expected searches, e.g.:
    Composite Infrared Spectrometer#CIRS
not    Composite Infrared Spectrometer (CIRS)

Parameters supporting multivalued lists include:
dataproduct_type (only when present in the same file; best avoided when possible)
target_name (for different targets only, but only one target can be described in the granule; use alt_target_name for other names of the same target)
alt_target_name
target_class (in association with target_name)
instrument_host_name (e.g. acronym and full name)
instrument_name (e.g. acronym and full name)
measurement_type (when present in the same file)
processing_level (when present in the same file)
bib_reference


• NULL and special values:
A standard query on a parameter will not return granules with NULL/void value. E.g. target_name LIKE '%toto%' will only select granules with this value (standard ADQL behavior).
NULL/void has to be tested specifically (e.g., when it means "I don't know") using the IS operator (IS is used only to test the NULL value in ADQL): 

target_name LIKE '%toto%' OR target_name IS NULL

Syntax IS NULL stands for both strings and numerical parameters (the = operator is accepted in this context only by latest DaCHS servers)

No inf, inf, or NaN value in ADQL? At least Inf/-Inf should be there, as per DALI.

• UCDs: the above table has been reviewed against the UCD documents, including latest discussions (4/2019). Review against PDS4 and IPDA to be performed.

2018 discussions / conclusions have been included here: https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList1dot42017June2018FebRFM

• *_min vs *_max parameters: 

If only one value is available, it must appear in both fields

• Optional parameters: some of these come in sets that are logically related; if one is present, the related ones must be present also (e.g., 3 access_* parameters)

• Granule_gid: any general indication to providers? I.e.: preview, native, calibrated, geometry… 
A client should be able to display the values present in a service (feasible in TOPCAT)

• Reshuffle previous "service parameters":

  • Mandatory :
    publisher - make it mandatory???
    add publisher_did as in Obscore? (for DaCHS/registry; provides unique ID of service for this publisher/server), with UCD = meta.ref.uri;meta.curation 
  • Optional 
    spatial_coordinate_description  (default = none)
    spatial_origin  (default = body center or SS barycenter? Or observer location)
    time_origin  (default = observer)
    time_scale (default = UTC – no other values allowed in data services? [only in computational services, e.g. ephemeris])
    Same values to be used in registry declaration 

• Call-back parameters / reference

Currently using service_title (= schema name) + granule_uid. 

May use ivoID in the future.

• Other parameters

The most recent extra parameters often have names starting in prefix_*, where prefix identify the scope or context (e.g., spase_, vims_, image_, etc). Seems to be a good practice.

Accref is introduced by the EPN-TAP localfile mixin, but not used - in principle not included in TAP response, be may be present anyway. It may be better to hide it also in the portal.


• Parameters introducing error bars/uncertainties

Some parameters providing a scalar value X in the EPN-TAP table may be associated with an error bar in a related parameter. This is currently (4/2019) entered as:

In Basecom: Xerr (to be changed when upgrading to mixin version)
In DynAstVO: X_error
In Exoplanets: X_error_min; X_error_max
In planets: X_uncertainty
TNOsarecool: X_sigma_plus, X_sigma_minus (to be changed?)

The associated UCDs start with stat.error; or stat.error;stat.min; & stat.error;stat.max;


• Support for PDS3 detached labels (proposal)

Solution with datalink seems OK: data files under access_url and detached labels provided under datalink_url in a link table - although no attempt made to read them from the portal , yet (use VIR unpublished service to test this).

...