/[volute]/trunk/projects/registry/Identifiers/Identifiers.tex
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revision 3035 by volute@g-vo.org, Thu Jul 9 13:56:48 2015 UTC revision 3036 by msdemlei, Tue Aug 25 07:01:13 2015 UTC
# Line 270  Line 270 
270  IVOIDs since it complicated the text but had never actually been found  IVOIDs since it complicated the text but had never actually been found
271  useful.  Even in XML serializations only the URI form of IVOA  useful.  Even in XML serializations only the URI form of IVOA
272  identifiers had been used.  Dropping the XML form nevertheless  identifiers had been used.  Dropping the XML form nevertheless
273  constitutes an incompatible change, which necessiates an increase in the  constitutes an incompatible change, which necessitates an increase in the
274  major version number.  major version number.
275    
276  Despite the new major version, consensus was that current usage of  Despite the new major version, consensus was that current usage of
# Line 545  Line 545 
545    
546  Note that, as discussed in sect.~\ref{sect:chars}, characters from  Note that, as discussed in sect.~\ref{sect:chars}, characters from
547  \abnfnt{sub-delims} MUST NOT be used in resource keys unless their  \abnfnt{sub-delims} MUST NOT be used in resource keys unless their
548  semanitcs is defined in an IVOA specification.  As percent-encoded  semantics is defined in an IVOA specification.  As percent-encoded
549  characters are not allowed in resource keys, these characters MUST NOT  characters are not allowed in resource keys, these characters MUST NOT
550  occur in generic IVORNs at all.  occur in generic IVORNs at all.
551    
# Line 672  Line 672 
672  IVORNs can be case-folded for processing.  IVORNs can be case-folded for processing.
673  \end{itemize}  \end{itemize}
674    
675  Note that neither query parts nor fragement identifiers may be compared  Note that neither query parts nor fragment identifiers may be compared
676  case-insensitively or normalized in any other way; allowing this would  case-insensitively or normalized in any other way; allowing this would
677  severely impact their usefulness, as they, in general, refer to  severely impact their usefulness, as they, in general, refer to
678  case-sensitive entities like XML ids or file system paths.  case-sensitive entities like XML ids or file system paths.
# Line 702  Line 702 
702  identifiers, ``unique'' means that a given identifier MUST NOT refer  identifiers, ``unique'' means that a given identifier MUST NOT refer
703  to two different resources at any instant.  Furthermore, the  to two different resources at any instant.  Furthermore, the
704  identifier SHOULD refer to at most one resource over all time; that  identifier SHOULD refer to at most one resource over all time; that
705  is, IVOIDs should not be reused for unrelated resrouces.  Note that a  is, IVOIDs should not be reused for unrelated resouces.  Note that a
706  resource may potentially be dynamic (such as 'weather at telescope' or  resource may potentially be dynamic (such as 'weather at telescope' or
707  'current version of the standard') -- here, there is a conceptually unique  'current version of the standard') -- here, there is a conceptually unique
708  resource, even though the content of it may change in time.  resource, even though the content of it may change in time.
# Line 792  Line 792 
792  \end{enumerate}  \end{enumerate}
793    
794  Existing DIDs in services implementing SSAP up to 1.1 and Obscore 1.0  Existing DIDs in services implementing SSAP up to 1.1 and Obscore 1.0
795  are not affected by these requirement and may be used until the  are not affected by these requirements and may be used until the
796  respective services are updated to newer standards.  respective services are updated to newer standards.
797    
798  \subsection{Standard Identifiers}  \subsection{Standard Identifiers}

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