Re: [PATCH 1/4] DTD changes for mms, prepaid, wap

[Marcel Holtmann <marcel holtmann org>]

Hi Andrew,

> > > diff --git a/serviceproviders.2.dtd b/serviceproviders.2.dtd
> > > index d150a99..a0c5a31 100644
> > > --- a/serviceproviders.2.dtd
> > > +++ b/serviceproviders.2.dtd
> > > @@ -18,6 +18,7 @@
> > > 
> > >                 password?,
> > >                 dns*)>
> > >  
> > >  <!ATTLIST apn value CDATA #REQUIRED>
> > > 
> > > +<!ATTLIST apn type (mms|prepaid|wap) #IMPLIED>
> > 
> > I would propose "internet", "mms" and "wap" as types. That is really
> > what we care about. What can you do with this context.
> > 
> > The only tricky part is that in some cases some providers use the same
> > APN for Internet access and MMS. We could just list the context twice in
> > that case or have a list of types per context.
> > 
> > Android seems to use comma separated string for this. Where there also
> > have some custom defined types like special Assisted GPS contexts. That
> > seems to be Nokia specific detail in some countries with a total
> > different billing concept.
> > 
> > In addition to the actual type of the APN, I like to see an attribute
> > for the "plan". So we can differentiate between "broadband", "prepaid"
> > and others.
> > 
> How would you describe the association between MMS and internet APNs? For 
> example in the UK Vodafone has the following APN usage:
> 
> Contract Plan (MMS retrieval bandwidth is zero rated)
> ========
> internet access is via 'internet' APN
> MMS retrieval is via 'wap.vodafone.co.uk' APN
> 
> Prepay Plan (MMS retrieval bandwidth is charged too) 
> =======
> internet access is via 'pp.internet' APN
> MMS retrieval is via 'pp.internet' APN
> 
> So it's important to select the correct APN for your plan even when retrieving 
> MMS as either it won't function with your SIM, or you'll get charged for 
> bandwidth when you shouldn't

that is exactly my point in separating these:

	wap.vodafone.co.uk ==> type="mms" plan="contract"
	pp.internet        ==> type="mms" plan="prepaid"

So you can define a type with different plan details.

Regards

Marcel