IVOA UCD1+ tools
This page provides a few basic tools for UCD1+. Note that they can also be invoked as
Web Services (for
integration as simple routines in your applications in Java, .NET, PERL ... ).
Translate a UCD1 into the default corresponding UCD1+ :
Find a UCD1+ corresponding to a description :
This tool will return a "best guess" value only: it might fail in
some cases. You can use an
to interactively assign UCD1+ to descriptions to override the default behaviour.
Find a list of candidate UCD1+ words matching a description :
This tool will return a list of candidate words: use the assign method for building
a complete UCD..
Check if a UCD1+ is valid :
The first word of the result is an error code,
possibly followed by an explanation of the error.
This function will return 0 if the UCD1+ is fully valid.
The error-code results from the combination (logical OR) of the following values:
Example: an error-code value of 10 will indicate the use of a deprecated word and a syntax error.
- 1: warning indicating use of non-standard namespace (not ivoa:)
- 2: use of deprecated word
- 4: use of non-existing word
- 16: syntax error (extra space or unallowed character)
The official UCD1+ words have sometimes undergone changes.
This function will upgrade deprecated words within a UCD1+ (causing
error-code 2 in validate) to their currently valid expression :
This tool gives a plain-text explanation for a UCD1+ :