(r11) UCDList_1-6_RFM < IVOA

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---+ Request for Modification (RFM) for the UCD vocabulary towards UCDList v1.6

This page summarises the steps for Modifications and Updates proposed in the [[https://www.ivoa.net/documents/UCDlistMaintenance/index.html][UCD List Maintenance]] recommendation. The UCDListMaintenancePage summarises the past and current RFMs.

The third (on going) iteration for the Request for modifications of UCD terms is summarized in the following content.

These terms are submitted for evaluation to the UCD science committee (see details in the Maintenance Specification document).

---+ UCDList v1.6 Request For Modifications, from Oct 2022 to now

---

Accepted RFMs

---

Pending RFMs

From [[https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList_1-3_RFM][UCDList 1.3 RFM]]: pos.rotation, pos.euleraAngle, pos.quaternion, ... pos.heliocentric, pos.heliographic, etc .. postponed for better understanding

From [[https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList_1-4_RFM][UCDList 1.4 RFM]]: stat.histogram (use case to be further detailed). See further discussion below.

---

Rejected RFMs

---++ 
---

Still in discussion from RFM 1.5
---+++ Proposals from StephaneErard ([[https://voparis-gitlab.obspm.fr/vespa/ivoa-standards/semantics/vep-ucd/-/blob/master/VEP-UCD-003.txt][VEP-UCD-003]])

   * *Proposed term*: pos.moc
   * *Proposed description*: Multi-order coverage
   * *Prefix*: S
   * *Rationale*: This term is used to tag a parameter containing a MOC (of any type, e.g, temporal, spatial, both, or any future MOC types)
   * *Used-in*: EPNcore-2.0
   * *Discussion*:The closest term available is _pos.contour_, but it doesn't seem adequate for multi-order coverage.
*Sci-UCD Discussion*: Three cases:
   * a VOTable field is tagged with "pos.moc", in this case, the xtype attribute must be present to tell what is the encoding of the MOC
   * "pos.moc" is in the EpnCore "measurement_type", to advertise the content of the product. Could be used with "dataproduct_type", to tell which axes are in the MOC (e.g., 'im' for classical MOC, 'mo' for STMOC, 'ts' for TMOC...)
   * A VOTable field with URLs pointing to MOC products. The UCD would be "meta.ref.url;pos.moc"
ML: To be discussed again

BC [2023-06-22]: "meta.coverage" proposition discussed in VEP 
---

   * *Proposed term*: pos.projection
   * *Proposed description*: Geometric projection
   * *Prefix*: S
   * *Rationale*: This term is used to tag a parameter containing the projection in use, or to identified parameters that have been projected onto a map (map projected products).
   * *Used-in*: EPNcore-2.0
   * *Discussion*: The current UCD List contains `pos.lambert` which is a specific projection type, which can't cover all the needs for geometric projection tagging.

BC [2023-06-22]: accepted in VEP, to be used with meta.id as primary. 

If `pos.lambert` is not used currently in registry => possibly deprecate and move to `pos.projection.lambert` ?

---

*Sci-UCD Discussion*: during EPN-TAP RFC review, MarkTaylor proposed to have Q prefixes for both pos.moc and pos.projection.

---+++ Proposal from AdaNebot ([[https://voparis-gitlab.obspm.fr/vespa/ivoa-standards/semantics/vep-ucd/-/blob/master/VEP-UCD-004.txt][VEP-UCD-004]])

   * *Proposed term*: time.period.oscillation
   * *Proposed description*: Period of pulsation of a body (similar to solar pulsations or oscillations)
   * *Prefix*: Q
   * *Rationale*: This term is used to measure periods in oscillating phenomena.
   * *Used-in*: https://academic.oup.com/mnras/article/487/3/3523/5512602
   * *Discussion*: This term was proposed actually by Ada Nebot to consider oscillating phenomena on sky objects and cover possible time measurements used in these studies. This is a first term proposal for addition concerning oscillating stars, etc ...
2022-05-20 ML pending . More discussion to refine a clear definition
BC [2023-06-22]: no objection, but ML to discuss again with Ada.

---+++ Proposal from MarkusDemleitner & BaptisteCecconi ([[https://voparis-gitlab.obspm.fr/vespa/ivoa-standards/semantics/vep-ucd/-/blob/master/VEP-UCD-005.txt][VEP-UCD-005]], initially in [[https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList_1-4_RFM][UCDList 1.4 RFM]])

   * *Proposed term*: stat.histogram
   * *Proposed description*: An array-like object with counts or ratios in bins
   * *Prefix*: P
   * *Rationale*:
   * *Used-in*:
   * *Discussion*: See [[https://voparis-gitlab.obspm.fr/vespa/ivoa-standards/semantics/vep-ucd/-/blob/master/VEP-UCD-005.txt][VEP-UCD-005]], and [[https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList_1-4_RFM][UCDList 1.4 RFM]] for the detailed discussion.
*Sci-UCD Further Discussion*: The same discussion as that of *pos.moc* applies for the use cases. Depending on how what is tagged, P or S flag should be used, and a specific *dataproduct_type* may also be needed to advertise a product in an ObsTAP or EPN-TAP table.

BC [2023-06-22]: what about using `stat.distribution` which would be more generic (with possible child `stat.distribution.cumulative` or `stat.distribution.histogram`) ?

---++ Proposed RFMs - suggestions for datasets issued in the science domain of gravitational waves
---+++ Proposals from M.Louys , S.Derriere for P. Chanial ([[https://voparis-gitlab.obspm.fr/vespa/ivoa-standards/semantics/vep-ucd/-/blob/master/VEP-UCD-011.txt][VEP-UCD-011]])

   * *Proposed term*: stat.confidenceLevel
   * *Proposed description*:
   * *Prefix*: P
   * *Rationale*: GW studies produce maps of the sky with regions showing detection likelihood at particular confidence level . Such a confidence level can be a selection criteria for a map, or a dataset in general.
   * *Used-in*: Gravitational waves catalogs
   * *Discussion*:

BC [2023-06-22]: Would be useful for a column providing the confidence level used to derive min/max values of a distribution. 
Could be associated with `stat.stdev` or `stat.percentile` (would require change `stat.stdev` to Q). Examples:
   * 3 sigma confidence level => value = 3 and ucd = `stat.confidenceLevel;stat.stdev`
   * 95 % confidence level => value = 95 and ucd = `stat.confidenceLevel;stat.percentile`
To be checked if applicable in some Vizier tables. 

---++ Proposed RFMs  for Ambiant Conditions at telescopes sites

---++++ Proposals from A. Micol , ESO Archive 

List of terms and concepts to cover (open for discussion) : [[%ATTACHURL%/UCD_List_AmbientParams-annotatedOct22.ods][ ESO VLT Ambient parameters]]
New terms proposal :TBC

<span style="font-size: 17.290001px; font-weight: bold;">Proposals from M.Louys , S.Derriere for A. Micol ([[https://voparis-gitlab.obspm.fr/vespa/ivoa-standards/semantics/vep-ucd/-/blob/master/???][???]]) </span>

   * *Proposed term*: obs.atmos.humidity
   * *Proposed description*:
   * *Prefix*: S
   * *Rationale*: Ambient conditions measure various physical parameters at telescope site to monitor turbulence, seeing, etc.
   * *Used-in*: ESO FITS keywords for observations at Paranal , etc .
   * *Discussion*: Some of these parameters are general, some have a very specific definition for the assment of physical conditions at the telescope's site. Their meaning may be restricted to a the local definition of the measure at the site. In this case , such terms can be branched under obs.atmos. 
<span style="white-space: pre;"> </span>On the contrary general terms can be branched below phys.*. 
   * TBC......
<span style="color: #e2e2e2;"> </span>
---

<span style="color: #e2e2e2;"> <br /></span>

---++ Proposed RFMs - modification suggestions for planetary science 
---++++ Proposals from J. Berthier , IMCCE, Paris Observatory
List of terms and concepts to cover (open for discussion) : [[%ATTACHURL%/ucd_RFM_SolarSystem_JB.pdf][UCDs Requests for Planetary data]]

---+++ Summary for iteration UCDList1.5 to UCDList1.6
---+++ UCD proposal applied as changes for UCDList1.6

| *Term* | *VEP-UCD link* | *Modification Type* | *Decision* |
| xxx | [[https://voparis-gitlab.obspm.fr/vespa/ivoa-standards/semantics/vep-ucd/-/blob/master/VEP-UCD-yy.txt][VEP-UCD-yy.txt]] | action | approved |

---+++ UCD proposals rejected and solved

| *Term* | *VEP-UCD link* | *Suggestion*| *Use instead* | 
| xxx |  | can combine existing UCD |  |
| |  | |  |

---+++ UCD proposals not solved yet --&gt; for next step

| *Term* | *VEP-UCD link* | *Modification Type* | *Decision* |
| |  | | |
| | | |  |


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Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
pdf	ProposalForNew_obs_atmos_UCDs2023-05-10.pdf	r1	manage	61.8 K	2023-05-11 - 05:46	MireilleLouys	Proposed UCD tree inclusion for Ambient parameters at telescope site
ods	UCDNewtermsProposalForAmbientParametersatESO.ods	r1	manage	15.6 K	2022-10-24 - 15:58	MireilleLouys	list of terms to discuss
pdf	UCDNewtermsProposalForAmbientParametersatESO.pdf	r1	manage	43.1 K	2022-10-24 - 16:05	MireilleLouys	first proposal / to be discussed
xlsm	UCD_List_AmbientParams-annotated-revMarch10-2023.xlsm	r1	manage	26.1 K	2023-03-10 - 18:47	MireilleLouys	3rd proposal / to be discussed
xlsx	UCD_List_AmbientParams-annotated-vrev27Janv2023.xlsx	r1	manage	25.3 K	2023-03-02 - 14:31	MireilleLouys	revised ambient
ods	UCD_List_AmbientParams-annotatedOct22.ods	r1	manage	32.1 K	2022-10-24 - 16:19	MireilleLouys	list of terms to discuss
pdf	ucd_RFM_SolarSystem_JB.pdf	r1	manage	23.3 K	2023-05-09 - 13:40	MireilleLouys	RFM for Solar System data/ J. Berthier

Topic revision: r11 - 2023-06-22 - BaptisteCecconi

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