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Re: Attribute Order

• To: <xml-dev@l...>
• Subject: Re: Attribute Order
• From: "Rick Jelliffe" <ricko@a...>
• Date: Sat, 8 Dec 2001 13:21:58 +1100
• Cc: "Joe English" <jenglish@f...>
• References: <3549BAFD79A7D411A1CF00508B62B5BC0124B929@e...> <200112080133.RAA22805@d...>

 
> The tough constraint is that the 'units', 'min', 'max', and
> 'default' attributes must be dimensionally compatible.
> So for example
> 
>     <field
> name = "OMEGA"
> units = "radian/sec"
> min = "0 deg/sec"
> max = "1000 rpm"
> default = "10 hz"
>     >
> 
> would be legal, but 'units = "meter/sec", default="5 feet"'
> would not be.
> 
> I don't know of any schema language that can enforce this
> constraint (and if there were one, I doubt that I'd want
> to use it :-).  We use a combination of DTDs, Schematron,
> and Tcl for validation.
 
I think you can check these using Schematron. You can divide up
an attribute value into tokens and treat the tokens as numbers and
co-constrain them.

Cheers
Rick Jelliffe

• References:
  • RE: Attribute Order
    • From: Jeff Lowery <jlowery@s...>
  • Re: Attribute Order
    • From: Joe English <jenglish@f...>

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