Re: [ubl] use of 'ID' in documents

[Betty Harvey <harvey@eccnet.com>]

I am not sure how you would handle this in the spreadsheets but W3C
schema is capable of modeling this situation:

<xsd:sequence>
 <xsd:choice minOccurs="1">
	<xsd:element ref="BuyersID"/>
	<xsd:element ref="SellersID"/>
 </xsd:choice>
<xsd:element ref="CopyIndicatory"/>
. . .
</xsd:sequence>

If the choice is optional, i.e., no BuyersID or SellersID, then the
"minOccurs" attribute would be set to 0.

Betty

On Thu, 11 Aug 2005, Tim McGrath wrote:

> this comes from trying to implement a rule that goes along the lines of...
> 
> "all documents must have an ID.  However with some documents (eg Order) 
> it may be either the BuyersID and/or the SellersID"
> 
> unfortunately we dont have schema (or spreadsheet) syntax for "either 
> are optional but one must be used" - which is actually a common rule in 
> the real world.  What we have don is the best we can.
> 
> Anne Hendry wrote:
> 
> > We notice that some documents contain an 'ID' element.  The 'ID' 
> > elements seem to be mandatory.  The documents that don't have 'ID' 
> > seem to have 'BuyersID' and 'SellersID', but those are optional.
> >
> > Is this an intended modeling aspect that assumes in the documents that 
> > don't have 'ID' the users would implement either a BuyersID or 
> > SellersID, even though they are both optional?  Do we want to 
> > duplicate this model for new documents?  When do you determine you 
> > want a mandatory ID vs. two optional Buyers|Sellers IDs?
> >
> > Thanks,
> > Anne
> >
> >
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> 

-- 
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Betty Harvey                         | Phone: 410-787-9200 FAX: 9830
Electronic Commerce Connection, Inc. |
harvey@eccnet.com                    | Washington,DC XML Users Grp
URL:  http://www.eccnet.com          | http://www.eccnet.com/xmlug
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