Re: [ubl-lcsc] Re: UBL 0.81 CCT draft-9-mod

[Tim McGrath <tmcgrath@portcomm.com.au>]

i take your point Jon.

my reaction to this is somewhat akin to yours about list containership. 
 my experience makes me nervous about this idea, even though it sounds 
sensible.

In EDI syntaxes, X12 has similiar data types to XSD, such as ID 
(identifier), DT (date), TM(Time), R (percent), etc.  it is interesting 
to note that when EDIFACT came out it reduced these to three data types 
(alphabetic, numeric and alpha-numeric).  even so, i have lost count of 
the times applications needed to use numeric digits in elements defined 
as alphabetic or needed spaces in numerically-defined elements.  

i am not advocating we discourage schema validation of data types.  i 
just wondered if this was best left to the contexts of implementation 
and should be defined by extension to the 'vanilla' UBL types if the 
customer wants it.

finally, whichever way we go, we should be consistent - we utilise the 
precision of XSD datatypes and their derivations (such as dateTime and 
token) or we don't. at present we appear to be making arbitary decisions.

jon.bosak@sun.com wrote:

>| what is the problem with making code and identifier (and every
>| other data type) as 'string'? what are we trying to gain by
>| enforcing patterns in the data?
>
>Basically the same things you get by specifying a schema in the
>first place.
>
>1. The offloading of as much constraint checking as you can onto
>   the client in order to minimize the number of returned messages
>   from the recipient.  This becomes especially important when
>   trying to get away from the need for 24x7 connectivity, as in
>   the current RosettaNet Appliance effort.
>
>2. The ability of generic schema-aware XML editors to become
>   self-configuring data input interfaces.
>
>Jon
>
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>
>  
>

-- 
regards
tim mcgrath
phone: +618 93352228  
postal: po box 1289   fremantle    western australia 6160