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Re: regex for media types

From: Mark Nottingham <mark.nottingham@bea.com>
Date: Mon, 4 Aug 2003 14:31:12 -0700
Cc: xml-dist-app@w3.org
To: "Amy Lewis" <alewis@tibco.com>
Message-Id: <F85C0A92-C6C2-11D7-94F1-00039396E15A@bea.com>

On Monday, August 4, 2003, at 08:11 AM, Amy Lewis wrote:
> Unless the working group/task force has reason to believe that the IANA
> is going to change its long-standing policy of conservatism in the
> approval of new types, this statement is not quite correct.
> One new type has been added since the publication of the four MIME RFCs
> ("model").  There is good reason to suggest that an enumeration of 
> types
> is preferable to an open content model: what are you going to do with a
> type you don't recognize?  The reluctance of IANA to approve new types
> is another factor, as is the reasoning behind it: new types are avoided
> because they require changes to deployed software.

Hi Amy,

While new top-level media types aren't added often, there is an 
extensibility point for them in the 'x-' convention. Enumerating them 
won't really improve interoperability, as many implementations won't 
recognize subtypes, and will require us to revise the specification 
each time a major type is added.

> So, I would think that it would be better to enumerate, with an escape
> to vendor-defined or random types.  But the enumeration is valuable,
> signalling the set of types that processors should (in some fashion)
> support.

What does it mean for a processor to support a type? The typing is 
useful to the application, not the SOAP stack, in MTOM.

Received on Monday, 4 August 2003 17:31:17 UTC

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