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Re: analysis of YANG vs. RELAX NG

Andy Bierman <ietf@andybierman.com> Fri, 30 November 2007 19:54 UTC

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Date: Fri, 30 Nov 2007 11:56:03 -0800
From: Andy Bierman <ietf@andybierman.com>
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To: Martin Bjorklund <mbj@tail-f.com>
Subject: Re: analysis of YANG vs. RELAX NG
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Martin Bjorklund wrote:
> Hi,
>...
>> Defining new data types in YANG is completely gratuitous syntax.
> 
> I'm sorry, I don't understand what this means. Could you explain what
> you mean?
>

I am confused by this as well.
I think this means the extra types in YANG that are
not in RNG.  They are mostly NETCONF-specific, or
at least NM-specific.

The choice of builtin types is somewhat subjective.
Some of the 'extra' types could be derived types instead.

Almost all types could just be 'string', and we don't
need to bother with any data-typing at all.  Indeed,
that is a choice the data model writer could make, although
IMO it is bad SW design.

> 
> /martin
> 
> 
> 
> 

Andy

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