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Subject: Re: [ubl-lcsc] ASBIE semantics annotations (was Re: [ubl-lcsc] Re: Position Paper on List Containers)

** Reply to message from "Eve L. Maler" <eve.maler@sun.com> on Mon, 01 Sep 2003
19:12:51 -0400

> Don't our global elements have multiple uses necessitating multiple 
> references in different content models with different shades of meaning? 
>   This corresponds to the association BIE concept -- a "flavor" of an 
> aggregate BIE reflecting its use within a higher-level aggregate BIE. 
> My recommendation, quite a while back, was that we put the ASBIE 
> semantics in the <element ref=> annotations and the original ABIE 
> semantics in the <element name=> annotations...  It would be a shame if 
> this weren't possible with current tools, since otherwise those shades 
> of meaning have nowhere sensible to go.

Wanting to annotate element references is a perfectly reasonable aspiration,
and is supported by W3C XML Schema.  Unfortunately, of the two major XML Schema
editors (XML Spy & TurboXML, in no particular order), the latter will trash
element reference annotations if you open a Schema with it and then save that
Schema.  This is likely to cause confusion to a numerically significant
proportion of UBL users if UBL uses element reference annotations.

For my own part, I sometimes *fake* element reference annotations by annotating
element definitions with information about their children.  A little more
indirect, but technically equivalent, and a little more robust.  Alternatively,
this is another area where Schema Adjuncts would be useful, if OASIS could
bring that spec back from the dead.

Anthony B. Coates
London Market Systems Limited
33 Throgmorton Street, London, EC2N 2BR 
Mobile/Cell: +44 (79) 0543 9026
[MDDL Editor (Market Data Definition Language), http://www.mddl.org/]
[FpML Arch WG Member (Financial Products Markup Language), http://www.fpml.org/]
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