Re: XML-like date/time support ?

[Richard Dawe]

Hello.

Nicolas Mailhot wrote:
[snip]
> W3C schema and relax NG are two grammars for specifying constraints on
> an XML document. W3C schema is the oldest one and the only one everyone
> supports. Relax NG is an newer alternative.
>
> http://www.oasis-open.org/committees/relax-ng/spec-20011203.html
>
> A lot of people are very very frustrated with W3C schema. However the
> frustration is not related to the datatypes part, as far as I know every
> single w3c schema datatype is reproduced as-is in relax NG.

My so far brief experience of XML schema vs. Relax NG comes down to this:

* It looks a lot simpler to express your document in Relax NG than XML 
schema. I haven't tried this myself, but a number of people at my work 
have and also say this.

* XML schema has no way of saying "allow this group of elements in any 
order". There are ways round that, but they produce a sub-optimal schema 
which can let errors through. Relax NG supports this natively.

* Relax NG's syntax looks a lot easier to remember. I keep having to 
look at "XML in a Nutshell"'s XML schema chapter, to write any XML schema.

Bye, Rich =]

--
Richard Dawe [ http://homepages.nildram.co.uk/~phekda/richdawe/ ]

"You can't evaluate a man by logic alone."
  -- McCoy, "I, Mudd", Star Trek