A (pdf) version of this page.

RFM (Request for modification) of the List of UCD-words

AndreaPreiteMartinez IVOA – Semantics WG

TN - 20060713

Answers inserted 06 Sep 2006

What follows is a list of proposed requests (RFM) to modify/add the present standard list of ucd-words: The UCD1+ controlled vocabulary, Vers. 1.11 - IVOA Recommendation 31 December 2005 (http://www.ivoa.net/Documents/latest/UCDlist.html ).

The RFMs were collected over the past few month, from suggestions coming from various members of the IVOA community. The list has been presented at the UCD-session in Victoria, and corrected taking into account the discussions during the meeting within the WG and with the Theory IG. Other suggestions have been added to describe attributes used by some Data Models.

The list is open for discussion in accordance with the approved standard procedure: Maintenance of the list of UCD words, Version 1.20 - IVOA Recommendation 28 May 2006 (http://www.ivoa.net/Documents/latest/UCDlistMaintenance.html ).

Due to web security problems, for the moment we discourage the usage of the web-based form for submitting RFMs. On the other hand we can consider the present list of RFMs as a collective effort of the community, not requiring a private personal answer (see par. 2.2 and 2.3 of the maintenance document). For the time being, all the RFMs and all the corresponding answers will be grouped together in the present public document. Other RFMs could be proposed during the discussion phase, so that we can consider this document as a temporary repository of all proposed RFMs.

1. RFM (amendments/clarifications):

A generic request was presented for a richer semantic definition of ucd-words as part of the document itself or, alternatively, to include an explicit, and obvious, reference to a separate "usage" document with examples.
Answer: The original request concerned the description of the ucd-words in the time branch. A complete proposed revision of the time branch can be found in a TN at the end of this document.

2. RFM (deletions/replacements):

Q | phys.atmol | suppress without replacing
A: there is not such a quantity as “phys.atmol”, but the word could be used as a qualifier. The proposal is to replace it with: S | phys.atmol

3. RFM (additions):

S | phys.cosmology | Related to cosmology
A: ok

Examples:
meta.id;obs.proposal | name of the proposal
meta.code;obs.proposal | proposal code
meta.code.status;obs | status of an observation
meta.id.PI;obs | PI of the observation
meta.id.CoI;obs.proposal | Co-Investigator of the proposal

Examples:
meta.id;src.calib;phot | source used for photometric calibration
meta.id;src.calib;spectr | source used for spectroscopic calibration
meta.id;src.calib;pos | source used for positional/astrometric calibration

(a) use always phot.flux.density; UCDs don’t care about units;

(b) add the new words:
phot.flux.perFreq | Flux density (per unit frequency)
phot.flux.perWave | Flux density (per unit wl)
phot.flux.perEnergy | Flux density (per unit energy)
phot.flux.perWavenumber | Flux density (per unit wn)
phot.flux.perDecade ( nu*F_nu, lambda*F_lambda)

(c) use a composite UCD without need for new words:
phot.flux;em.freq
A: one vote against (c), I prefer (a)

A proposed new UCD1+ time-branch

A more consistent approach to the description of time-related quantities with UCDs.

AndreaPreiteMartinez, IVOA – Semantics WG

TN - 20060701

A: ok

The time branch in the IVOA Rec v1.11 is the following:

The request is to introduce a clearer separation between instant of time and duration in time.

The situation now is:

The words referring to instants of time are:
time.epoch
time.event.end
time.event.start
time.expo.end
time.expo.start
time.obs.end
time.obs.start

The words referring to a duration or an interval of time are:
time.event
time.expo
time.obs
time.interval
(but in this last case we mean a time-bin, or the time elapsed between two events, not the duration of an event. We need to make the description clearer)

In addition we have some other rather specific time-words that we leave untouched.

Proposal:

we keep the atoms indicating instants:
epoch,
start,
end
(although a strict hierarchization should give: epoch, epoch.start, epoch.end !!)

and we introduce a new atom duration to indicates duration, interval of time during which a generic event/observation/phenomenon is taking place.

We keep the atoms indicating what instants and duration we are referring to:
obs (observation)
expo (exposure)
event (generic event, pleonastic!)
and introduce a new atom sequence (to indicate a correlated sequence of observations)

One possible combination of atoms is:

time, at level 1
instants/duration at level 2
type of event described at level 3

Examples:

In addition, we propose three more atoms to describe creation, publication/release and processing times for data, files, catalogues, etc.

The new proposed time branch is illustrated in the following Table. New ucd-words and new descriptions are in italic. Old (v1.11) ucd-words that are not repeated in column new version are suppressed.

Table 1. The proposed new **time* branch in UCD1+.

In Table 2 we list the suppressed ucd-words, and the new words replacing them.

Table 2. Proposed suppressions / replacements

• UCDlist-WD20060906.pdf:

RFM (Request for modification) of the List of UCD-words

AndreaPreiteMartinez IVOA – Semantics WG

TN - 20060713

The RFMs were collected over the past few month, from suggestions coming from various members of the IVOA community. The list has been presented at the UCD-session in Victoria, and corrected taking into account the discussions during the meeting within the WG and with the Theory IG. Other suggestions have been added to describe attributes used by some Data Models.

The list is open for discussion in accordance with the approved standard procedure: Maintenance of the list of UCD words, Version 1.20 - IVOA Recommendation 28 May 2006 (http://www.ivoa.net/Documents/latest/UCDlistMaintenance.html ).

Due to web security problems, for the moment we discourage the usage of the web-based form for submitting RFMs. On the other hand we can consider the present list of RFMs as a collective effort of the community, not requiring a private personal answer (see par. 2.2 and 2.3 of the maintenance document). For the time being, all the RFMs and all the corresponding answers will be grouped together in the present public document. Other RFMs could be proposed during the discussion phase, so that we can consider this document as a temporary repository of all proposed RFMs.

1. RFM (amendments/clarifications):

A generic request was presented for a richer semantic definition of ucd-words as part of the document itself or, alternatively, to include an explicit, and obvious, reference to a separate "usage" document with examples.
Answer: The original request concerned the description of the ucd-words in the time branch. A complete proposed revision of the time branch can be found in a TN at the end of this document.

2. RFM (deletions/replacements):

Q | phys.atmol | suppress without replacing
A: there is not such a quantity as “phys.atmol”, but the word could be used as a qualifier. The proposal is to replace it with: S | phys.atmol

3. RFM (additions):

Examples:
meta.id;src.calib;phot | source used for photometric calibration
meta.id;src.calib;spectr | source used for spectroscopic calibration
meta.id;src.calib;pos | source used for positional/astrometric calibration

(a) use always phot.flux.density; UCDs don’t care about units;

(b) add the new words:
phot.flux.perFreq | Flux density (per unit frequency)
phot.flux.perWave | Flux density (per unit wl)
phot.flux.perEnergy | Flux density (per unit energy)
phot.flux.perWavenumber | Flux density (per unit wn)
phot.flux.perDecade ( nu*F_nu, lambda*F_lambda)

A proposed new UCD1+ time-branch

A more consistent approach to the description of time-related quantities with UCDs.

AndreaPreiteMartinez, IVOA – Semantics WG

TN - 20060701

The request is to introduce a clearer separation between instant of time and duration in time.

The situation now is:

The words referring to instants of time are:
time.epoch
time.event.end
time.event.start
time.expo.end
time.expo.start
time.obs.end
time.obs.start

The words referring to a duration or an interval of time are:
time.event
time.expo
time.obs
time.interval
(but in this last case we mean a time-bin, or the time elapsed between two events, not the duration of an event. We need to make the description clearer)

In addition we have some other rather specific time-words that we leave untouched.

Proposal:

we keep the atoms indicating instants:
epoch,
start,
end
(although a strict hierarchization should give: epoch, epoch.start, epoch.end !!)

and we introduce a new atom duration to indicates duration, interval of time during which a generic event/observation/phenomenon is taking place.

We keep the atoms indicating what instants and duration we are referring to:
obs (observation)
expo (exposure)
event (generic event, pleonastic!)
and introduce a new atom sequence (to indicate a correlated sequence of observations)

One possible combination of atoms is:

time, at level 1
instants/duration at level 2
type of event described at level 3

Examples:

In addition, we propose three more atoms to describe creation, publication/release and processing times for data, files, catalogues, etc.

The new proposed time branch is illustrated in the following Table. New ucd-words and new descriptions are in italic. Old (v1.11) ucd-words that are not repeated in column new version are suppressed.

Table 1. The proposed new **time* branch in UCD1+.

In Table 2 we list the suppressed ucd-words, and the new words replacing them.

Table 2. Proposed suppressions / replacements

<-- 

 

 

 Set ALLOWTOPICRENAME = TWikiAdminGroup
 
 
-->

RFM (Request for modification) of the List of UCD-words

AndreaPreiteMartinez IVOA – Semantics WG

TN - 20060713

What follows is a list of proposed requests (RFM) to modify/add the present standard list of ucd-words: The UCD1+ controlled vocabulary, Vers. 1.11 - IVOA Recommendation 31 December 2005 (http://www.ivoa.net/Documents/latest/UCDlist.html ).

The RFMs were collected over the past few month, from suggestions coming from various members of the IVOA community. The list has been presented at the UCD-session in Victoria, and corrected taking into account the discussions during the meeting within the WG and with the Theory IG. Other suggestions have been added to describe attributes used by some Data Models.

The list is open for discussion in accordance with the approved standard procedure: Maintenance of the list of UCD words, Version 1.20 - IVOA Recommendation 28 May 2006 (http://www.ivoa.net/Documents/latest/UCDlistMaintenance.html ).

Due to web security problems, for the moment we discourage the usage of the web-based form for submitting RFMs. On the other hand we can consider the present list of RFMs as a collective effort of the community, not requiring a private personal answer (see par. 2.2 and 2.3 of the maintenance document). For the time being, all the RFMs and all the corresponding answers will be grouped together in the present public document. Other RFMs could be proposed during the discussion phase, so that we can consider this document as a temporary repository of all proposed RFMs.

1. RFM (amendments/clarifications):

A generic request was presented for a richer semantic definition of ucd-words as part of the document itself or, alternatively, to include an explicit, and obvious, reference to a separate "usage" document with examples.
Answer: The original request concerned the description of the ucd-words in the time branch. A complete proposed revision of the time branch can be found in a TN at the end of this document.

2. RFM (deletions/replacements):

Q | phys.atmol | suppress without replacing
A: there is not such a quantity as “phys.atmol”, but the word could be used as a qualifier. The proposal is to replace it with: S | phys.atmol

3. RFM (additions):

S | comp | Related to computational techniques, methods, etc.
A:

S | comp.sim.nbody | Nbody simulation
S | comp.sim.sph | Smoothed Particle Hydrodynamics simulation
S | comp.sim.boxside | Simulation box
S | comp.sim.gravsoft | gravitational softening
S | comp.sim.particles | simulation particles - for Nbody and SPH simulations
S | comp.sim.snapshot | output of a simulation box at a particular instant
S | comp.sim.grid | simulation grid - for hydro simulations
Q | comp.resource.processors | processors used
Q | comp.resource.memory | total size of a data file
Q | phys.cosmology.omega | matter/energy density of universe
Q | phys.cosmology.hubble | hubble constant
Q | phys.cosmology.sigma8 | Normalisation of matter power-spectrum
S | phys.matter.dark | dark matter tag
S | phys.matter.baryon | baryonic matter tag
S | phys.DarkEnergy | dark energy tag

Examples:
meta.id;obs.proposal | name of the proposal
meta.code;obs.proposal | proposal code
meta.code.status;obs | status of an observation
meta.id.PI;obs | PI of the observation
meta.id.CoI;obs.proposal | Co-Investigator of the proposal

Examples:
meta.id;src.calib;phot | source used for photometric calibration
meta.id;src.calib;spectr | source used for spectroscopic calibration
meta.id;src.calib;pos | source used for positional/astrometric calibration

(a) use always phot.flux.density; UCDs don’t care about units;

(b) add the new words:
phot.flux.perFreq | Flux density (per unit frequency)
phot.flux.perWave | Flux density (per unit wl)
phot.flux.perEnergy | Flux density (per unit energy)
phot.flux.perWavenumber | Flux density (per unit wn)
phot.flux.perDecade ( nu*F_nu, lambda*F_lambda)

(c) use a composite UCD without need for new words:
phot.flux;em.freq

Q | spect.line.strength | Spectral line strength S
A:

From DM-Spectral:

A proposed new UCD1+ time-branch

A more consistent approach to the description of time-related quantities with UCDs.

AndreaPreiteMartinez, IVOA – Semantics WG

TN - 20060701

The time branch in the IVOA Rec v1.11 is the following:

The request is to introduce a clearer separation between instant of time and duration in time.

The situation now is:

The words referring to instants of time are:
time.epoch
time.event.end
time.event.start
time.expo.end
time.expo.start
time.obs.end
time.obs.start

The words referring to a duration or an interval of time are:
time.event
time.expo
time.obs
time.interval
(but in this last case we mean a time-bin, or the time elapsed between two events, not the duration of an event. We need to make the description clearer)

In addition we have some other rather specific time-words that we leave untouched.

Proposal:

we keep the atoms indicating instants:
epoch,
start,
end
(although a strict hierarchization should give: epoch, epoch.start, epoch.end !!)

and we introduce a new atom duration to indicates duration, interval of time during which a generic event/observation/phenomenon is taking place.

We keep the atoms indicating what instants and duration we are referring to:
obs (observation)
expo (exposure)
event (generic event, pleonastic!)
and introduce a new atom sequence (to indicate a correlated sequence of observations)

One possible combination of atoms is:

time, at level 1
instants/duration at level 2
type of event described at level 3

Examples:

In addition, we propose three more atoms to describe creation, publication/release and processing times for data, files, catalogues, etc.

The new proposed time branch is illustrated in the following Table. New ucd-words and new descriptions are in italic. Old (v1.11) ucd-words that are not repeated in column new version are suppressed.

Table 1. The proposed new **time* branch in UCD1+.

In Table 2 we list the suppressed ucd-words, and the new words replacing them.

Table 2. Proposed suppressions / replacements

<-- 

 

 

 Set ALLOWTOPICRENAME = TWikiAdminGroup
 
 
-->

RFM (Request for modification) of the List of UCD-words

AndreaPreiteMartinez IVOA – Semantics WG

TN - 20060713

What follows is a list of proposed requests (RFM) to modify/add the present standard list of ucd-words: The UCD1+ controlled vocabulary, Vers. 1.11 - IVOA Recommendation 31 December 2005 (http://www.ivoa.net/Documents/latest/UCDlist.html ).

The RFMs were collected over the past few month, from suggestions coming from various members of the IVOA community. The list has been presented at the UCD-session in Victoria, and corrected taking into account the discussions during the meeting within the WG and with the Theory IG. Other suggestions have been added to describe attributes used by some Data Models.

The list is open for discussion in accordance with the approved standard procedure: Maintenance of the list of UCD words, Version 1.20 - IVOA Recommendation 28 May 2006 (http://www.ivoa.net/Documents/latest/UCDlistMaintenance.html ).

Due to web security problems, for the moment we discourage the usage of the web-based form for submitting RFMs. On the other hand we can consider the present list of RFMs as a collective effort of the community, not requiring a private personal answer (see par. 2.2 and 2.3 of the maintenance document). For the time being, all the RFMs and all the corresponding answers will be grouped together in the present public document. Other RFMs could be proposed during the discussion phase, so that we can consider this document as a temporary repository of all proposed RFMs.

A proposed new UCD1+ time-branch

A more consistent approach to the description of time-related quantities with UCDs.

AndreaPreiteMartinez, IVOA – Semantics WG

TN - 20060701

The time branch in the IVOA Rec v1.11 is the following:

The request is to introduce a clearer separation between instant of time and duration in time.

The situation now is:

The words referring to instants of time are:
time.epoch
time.event.end
time.event.start
time.expo.end
time.expo.start
time.obs.end
time.obs.start

The words referring to a duration or an interval of time are:
time.event
time.expo
time.obs
time.interval
(but in this last case we mean a time-bin, or the time elapsed between two events, not the duration of an event. We need to make the description clearer)

In addition we have some other rather specific time-words that we leave untouched.

Proposal:

we keep the atoms indicating instants:
epoch,
start,
end
(although a strict hierarchization should give: epoch, epoch.start, epoch.end !!)

and we introduce a new atom duration to indicates duration, interval of time during which a generic event/observation/phenomenon is taking place.

We keep the atoms indicating what instants and duration we are referring to:
obs (observation)
expo (exposure)
event (generic event, pleonastic!)
and introduce a new atom sequence (to indicate a correlated sequence of observations)

One possible combination of atoms is:

time, at level 1
instants/duration at level 2
type of event described at level 3

Examples:

In addition, we propose three more atoms to describe creation, publication/release and processing times for data, files, catalogues, etc.

The new proposed time branch is illustrated in the following Table. New ucd-words and new descriptions are in italic. Old (v1.11) ucd-words that are not repeated in column new version are suppressed.

Table 1. The proposed new **time* branch in UCD1+.

In Table 2 we list the suppressed ucd-words, and the new words replacing them.

Table 2. Proposed suppressions / replacements

<-- 

 

 

 Set ALLOWTOPICRENAME = TWikiAdminGroup
 
 
-->

RFM (Request for modification) of the List of UCD-words

AndreaPreiteMartinez IVOA – Semantics WG

TN - 20060713

What follows is a list of proposed requests (RFM) to modify/add the present standard list of ucd-words: The UCD1+ controlled vocabulary, Vers. 1.11 - IVOA Recommendation 31 December 2005 (http://www.ivoa.net/Documents/latest/UCDlist.html ).

The RFMs were collected over the past few month, from suggestions coming from various members of the IVOA community. The list has been presented at the UCD-session in Victoria, and corrected taking into account the discussions during the meeting within the WG and with the Theory IG. Other suggestions have been added to describe attributes used by some Data Models.

The list is open for discussion in accordance with the approved standard procedure: Maintenance of the list of UCD words, Version 1.20 - IVOA Recommendation 28 May 2006 (http://www.ivoa.net/Documents/latest/UCDlistMaintenance.html ).

Due to web security problems, for the moment we discourage the usage of the web-based form for submitting RFMs. On the other hand we can consider the present list of RFMs as a collective effort of the community, not requiring a private personal answer (see par. 2.2 and 2.3 of the maintenance document). For the time being, all the RFMs and all the corresponding answers will be grouped together in the present public document. Other RFMs could be proposed during the discussion phase, so that we can consider this document as a temporary repository of all proposed RFMs.

A proposed new UCD1+ time-branch

A more consistent approach to the description of time-related quantities with UCDs.

AndreaPreiteMartinez, IVOA – Semantics WG

TN - 20060701

The time branch in the IVOA Rec v1.11 is the following:

The request is to introduce a clearer separation between instant of time and duration in time.

The situation now is:

The words referring to instants of time are:
time.epoch
time.event.end
time.event.start
time.expo.end
time.expo.start
time.obs.end
time.obs.start

The words referring to a duration or an interval of time are:
time.event
time.expo
time.obs
time.interval
(but in this last case we mean a time-bin, or the time elapsed between two events, not the duration of an event. We need to make the description clearer)

In addition we have some other rather specific time-words that we leave untouched.

Proposal:

we keep the atoms indicating instants:
epoch,
start,
end
(although a strict hierarchization should give: epoch, epoch.start, epoch.end !!)

and we introduce a new atom duration to indicates duration, interval of time during which a generic event/observation/phenomenon is taking place.

We keep the atoms indicating what instants and duration we are referring to:
obs (observation)
expo (exposure)
event (generic event, pleonastic!)
and introduce a new atom sequence (to indicate a correlated sequence of observations)

One possible combination of atoms is:

time, at level 1
instants/duration at level 2
type of event described at level 3

Examples:

In addition, we propose three more atoms to describe creation, publication/release and processing times for data, files, catalogues, etc.

The new proposed time branch is illustrated in the following Table. New ucd-words and new descriptions are in italic. Old (v1.11) ucd-words that are not repeated in column new version are suppressed.

Table 1. The proposed new **time* branch in UCD1+.

In Table 2 we list the suppressed ucd-words, and the new words replacing them.

Table 2. Proposed suppressions / replacements

<-- 

 

 

 Set ALLOWTOPICRENAME = TWikiAdminGroup
 
 
-->

RFM (Request for modification) of the List of UCD-words

AndreaPreiteMartinez IVOA – Semantics WG

TN - 20060713

What follows is a list of proposed requests (RFM) to modify/add the present standard list of ucd-words: The UCD1+ controlled vocabulary, Vers. 1.11 - IVOA Recommendation 31 December 2005 (http://www.ivoa.net/Documents/latest/UCDlist.html ).

The RFMs were collected over the past few month, from suggestions coming from various members of the IVOA community. The list has been presented at the UCD-session in Victoria, and corrected taking into account the discussions during the meeting within the WG and with the Theory IG. Other suggestions have been added to describe attributes used by some Data Models.

The list is open for discussion in accordance with the approved standard procedure: Maintenance of the list of UCD words, Version 1.20 - IVOA Recommendation 28 May 2006 (http://www.ivoa.net/Documents/latest/UCDlistMaintenance.html ).

Due to web security problems, for the moment we discourage the usage of the web-based form for submitting RFMs. On the other hand we can consider the present list of RFMs as a collective effort of the community, not requiring a private personal answer (see par. 2.2 and 2.3 of the maintenance document). For the time being, all the RFMs and all the corresponding answers will be grouped together in the present public document. Other RFMs could be proposed during the discussion phase, so that we can consider this document as a temporary repository of all proposed RFMs.

A proposed new UCD1+ time-branch

A more consistent approach to the description of time-related quantities with UCDs.

AndreaPreiteMartinez, IVOA – Semantics WG

TN - 20060701

The time branch in the IVOA Rec v1.11 is the following:

The request is to introduce a clearer separation between instant of time and duration in time.

The situation now is:

In addition we have some other rather specific time-words that we leave untouched.

Proposal:

we keep the atoms indicating instants:
epoch,
start,
end
(although a strict hierarchization should give: epoch, epoch.start, epoch.end !!)

and we introduce a new atom duration to indicates duration, interval of time during which a generic event/observation/phenomenon is taking place.

We keep the atoms indicating what instants and duration we are referring to:
obs (observation)
expo (exposure)
event (generic event, pleonastic!)
and introduce a new atom sequence (to indicate a correlated sequence of observations)

One possible combination of atoms is:

time, at level 1
instants/duration at level 2
type of event described at level 3

Examples:

In addition, we propose three more atoms to describe creation, publication/release and processing times for data, files, catalogues, etc.

The new proposed time branch is illustrated in the following Table. New ucd-words and new descriptions are in italic. Old (v1.11) ucd-words that are not repeated in column new version are suppressed.

Table 1. The proposed new **time* branch in UCD1+.

In Table 2 we list the suppressed ucd-words, and the new words replacing them.

Table 2. Proposed suppressions / replacements

<-- 

 

 

 Set ALLOWTOPICRENAME = TWikiAdminGroup
 
 
-->

RFM (Request for modification) of the List of UCD-words

AndreaPreiteMartinez IVOA – Semantics WG

TN - 20060713

What follows is a list of proposed requests (RFM) to modify/add the present standard list of ucd-words: The UCD1+ controlled vocabulary, Vers. 1.11 - IVOA Recommendation 31 December 2005 (http://www.ivoa.net/Documents/latest/UCDlist.html ).

The RFMs were collected over the past few month, from suggestions coming from various members of the IVOA community. The list has been presented at the UCD-session in Victoria, and corrected taking into account the discussions during the meeting within the WG and with the Theory IG. Other suggestions have been added to describe attributes used by some Data Models.

The list is open for discussion in accordance with the approved standard procedure: Maintenance of the list of UCD words, Version 1.20 - IVOA Recommendation 28 May 2006 (http://www.ivoa.net/Documents/latest/UCDlistMaintenance.html ).

Due to web security problems, for the moment we discourage the usage of the web-based form for submitting RFMs. On the other hand we can consider the present list of RFMs as a collective effort of the community, not requiring a private personal answer (see par. 2.2 and 2.3 of the maintenance document). For the time being, all the RFMs and all the corresponding answers will be grouped together in the present public document. Other RFMs could be proposed during the discussion phase, so that we can consider this document as a temporary repository of all proposed RFMs.

A proposed new UCD1+ time-branch

A more consistent approach to the description of time-related quantities with UCDs.

AndreaPreiteMartinez, IVOA – Semantics WG

TN - 20060701

The time branch in the IVOA Rec v1.11 is the following:

The request is to introduce a clearer separation between instant of time and duration in time.

The situation now is:

The words referring to instants of time are:

time.epoch
time.event.end
time.event.start
time.expo.end
time.expo.start
time.obs.end
time.obs.start

The words referring to a duration or an interval of time are:

time.event
time.expo
time.obs
time.interval

(but in this last case we mean a time-bin, or the time elapsed between two events, not the duration of an event. We need to make the description clearer)

In addition we have some other rather specific time-words that we leave untouched.

Proposal:

we keep the atoms indicating instants:
epoch,
start,
end
(although a strict hierarchization should give: epoch, epoch.start, epoch.end !!)

and we introduce a new atom duration to indicates duration, interval of time during which a generic event/observation/phenomenon is taking place.

We keep the atoms indicating what instants and duration we are referring to:
obs (observation)
expo (exposure)
event (generic event, pleonastic!)
and introduce a new atom sequence (to indicate a correlated sequence of observations)

One possible combination of atoms is:

time, at level 1
instants/duration at level 2
type of event described at level 3

Examples:

In addition, we propose three more atoms to describe creation, publication/release and processing times for data, files, catalogues, etc.

<-- 

 

 

 Set ALLOWTOPICRENAME = TWikiAdminGroup
 
 
-->

RFM (Request for modification) of the List of UCD-words

What follows is a list of proposed requests (RFM) to modify/add the present standard list of ucd-words: The UCD1+ controlled vocabulary, Vers. 1.11 - IVOA Recommendation 31 December 2005 (http://www.ivoa.net/Documents/latest/UCDlist.html ).

The RFMs were collected over the past few month, from suggestions coming from various members of the IVOA community. The list has been presented at the UCD-session in Victoria, and corrected taking into account the discussions during the meeting within the WG and with the Theory IG. Other suggestions have been added to describe attributes used by some Data Models.

The list is open for discussion in accordance with the approved standard procedure: Maintenance of the list of UCD words, Version 1.20 - IVOA Recommendation 28 May 2006 (http://www.ivoa.net/Documents/latest/UCDlistMaintenance.html ).

Due to web security problems, for the moment we discourage the usage of the web-based form for submitting RFMs. On the other hand we can consider the present list of RFMs as a collective effort of the community, not requiring a private personal answer (see par. 2.2 and 2.3 of the maintenance document). For the time being, all the RFMs and all the corresponding answers will be grouped together in the present public document. Other RFMs could be proposed during the discussion phase, so that we can consider this document as a temporary repository of all proposed RFMs.

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RFM (Request for modification) of the List of UCD-words

A. Preite Martinez IVOA – Semantics WG TN - 20060713

What follows is a list of proposed requests (RFM) to modify/add the present standard list of ucd-words: The UCD1+ controlled vocabulary, Vers. 1.11 - IVOA Recommendation 31 December 2005 (http://www.ivoa.net/Documents/latest/UCDlist.html ).

The RFMs were collected over the past few month, from suggestions coming from various members of the IVOA community. The list has been presented at the UCD-session in Victoria, and corrected taking into account the discussions during the meeting within the WG and with the Theory IG. Other suggestions have been added to describe attributes used by some Data Models.

The list is open for discussion in accordance with the approved standard procedure: Maintenance of the list of UCD words, Version 1.20 - IVOA Recommendation 28 May 2006 (http://www.ivoa.net/Documents/latest/UCDlistMaintenance.html ).

Due to web security problems, for the moment we discourage the usage of the web-based form for submitting RFMs. On the other hand we can consider the present list of RFMs as a collective effort of the community, not requiring a private personal answer (see par. 2.2 and 2.3 of the maintenance document). For the time being, all the RFMs and all the corresponding answers will be grouped together in the present public document. Other RFMs could be proposed during the discussion phase, so that we can consider this document as a temporary repository of all proposed RFMs.

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