From e0efd2bb8afec6afeb4530c5fcfa0d5f15fce980 Mon Sep 17 00:00:00 2001 From: Adrian Damian Date: Fri, 18 Oct 2024 09:06:43 -0700 Subject: [PATCH] More fixes --- IVOAArchitecture.tex | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/IVOAArchitecture.tex b/IVOAArchitecture.tex index 6faadac..53cab0d 100644 --- a/IVOAArchitecture.tex +++ b/IVOAArchitecture.tex @@ -410,8 +410,9 @@ \section{Semantics Standards} places: From common designations of units to labels for physical quantities, from common names of reference frames and time scales to mutually understandable subject categories, from relationship types -between VO resources (``this service publishes images from A and spectra from B'') to fixed names for the messengers that produced the signals -recorded. +between VO resources +(``this service publishes images from A and spectra from B'') to fixed names +for the messengers that produced the signals recorded. The VO's semantics standards provide the basis of forming such consensual ``vocabularies'', which are, at their root, sets of labeled @@ -420,7 +421,8 @@ \section{Semantics Standards} interoperable with the rest of the semantic web by adopting the W3C's Resource Description Framework RDF. -The vocabularies themselves are usually introduced by standards that use them and are then maintained on the VO's repository of +The vocabularies themselves are usually introduced by standards that use +them and are then maintained on the VO's repository of vocabularies\footnote{\url{http://www.ivoa.net/rdf}}. In some cases, however, we go beyond RDF, usually because the labels have an intrinsic syntax. In these cases, the Semantics WG issues separate standards @@ -482,9 +484,11 @@ \subsection{UCD} qualifications. For instance, \ucd{phot.mag;em.opt.V} denotes a magnitude in the V band, \ucd{phot.flux;em.opt.V} a flux in the same band. The UCD standard defines how these compound UCDs are built, and -the UCD list defines restrictions as to where in complete UCDs atoms canbe used: some atoms can only be ``primary'', others are only available +the UCD list defines restrictions as to where in complete UCDs atoms can be +used: some atoms can only be ``primary'', others are only available as qualifiers. For instance, \ucd{stat.error} can only appear at the -start of a UCD, which ensures that ``Error in redshift'' will be encoded as \ucd{stat.error;src.redshift} rather than the other way round. +start of a UCD, which ensures that ``Error in redshift'' will be encoded +as \ucd{stat.error;src.redshift} rather than the other way round. The UCD ecosystem is completed by another standard on how new atoms are adopted to the list of UCDs.